:help2: Techs,
'99 Tahoe, 350 Vortec, 80K miles

I need your help please. I had the intake manifold gaskets changed 6 months and 35K miles ago due to previous owner putting non-DexCool fluid in it causing a leak. Anyway, I have now developed a oil leak at the front mating surface of the intake manifold and block. The shop did use RTV at the front and back of the manifold leaving the 2 small gaskets out. What torque should the intake manifold bolts be and what sequence? I need to check tonight so the wife can take it the 1400 miles to Lakeland, FL and back for a wedding. Thanks.

11 ft/lbs. Start in on the center bolt on the passenger side, then go back and forth working your way out to the end...
It sounds to me like you'll be putting another set of intake gaskets in though....

Mixing coolant did not cause the leak, it is a common problem with those motors, they use a plastic gasket, with a soft rubber type inner seal. Nobody left any gaskets out, we dont use gaskets there anymore, GM stopped that many years ago, sealer actually works better, as long as the surface is cleaned properly. I dont know how much retightening the bolts is going to help at this point, but here is the info you requested.


http://service.gm.com/engif/000/000/500/500689.gif
http://service.gm.com/tif.gif (http://service.gm.com/servlets/RetrieveTif?pic=500689)

Notice: Proper lower intake manifold fastener tightening sequence and torque is critical. Always follow the tightening sequence, and torque the intake manifold bolts using the 3 step method. Failing to do so may distort the crankshaft bearing bore alignment and cause damage to the crankshaft bearings.

Install the lower intake manifold bolts.
Tighten<LI type=a>Tighten the bolts on the first pass in sequence (1-8) to 3 N·m (27 lb in). <LI type=a>Tighten the bolts on the second pass in sequence (1-8) to 12 N·m (106 lb in).
Tighten the bolts on the final pass in sequence (1-8) to 15 N·m (11 lb ft).

:confuzeld You guys are awesome, thanks for the help.:ro) I'll change it myself this time, at least if I muck it up, I'll just be mad at myself. Do you happen to have the part # for the gasket set and recommended sealant so I can get them from gmpartsdirect?

Sure...Intake part number 12529094, Valve cover gasket (you need 1 to do the job, or do both if you wish) 10046089...I recommend "The right stuff" sealant from permatex..works great...Or, get GM's silicone if you wish....
Also, keep in mind that you have to pull the distributor...Make sure you mark the housing before you remove it....Also, pull the cap and mark where the rotor is pointing before moving the distributor..Then, when you unbolt it, pull up...The rotor will turn a bit because of the gear....Mark where it stops (I usually mark both on the firewall, but do whatever you're comfortable with...With these marks, you should be able to put the distributor back in and keep your timing right....

Gm doesn't sell the gaskets in a "kit"..Everything is piece by piece....
Also, if you want to replace the distributor gasket, the GM # is 10475923...
Have fun with it :grd:

Thanks again.:beerchug: I have installed a distributor 180 out on my old 283, she didn't want to run for some reason....also blew the power valve on the Holley when that fireball came out of the throat.:idiot:

Cobra,
Could you post or send me the entire procedure for r/r intake manifold? I just want to make sure I don't miss anything besides the obvious.

<LI type=1>Disconnect the battery negative cable. Refer to Battery Cable (http://service.gm.com/servlets/CellHandler?CellId=37471&RefDoc=332389&evc=sm) in Engine Electrical. <LI type=1>Drain the engine coolant. Refer to Draining and Filling Cooling System (http://service.gm.com/servlets/CellHandler?CellId=37226&RefDoc=332389&evc=sm) . <LI type=1>Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls.
http://service.gm.com/engif/000/000/182/182853.gif
http://service.gm.com/tif.gif (http://service.gm.com/servlets/RetrieveTif?pic=182853)
<LI type=1>Remove the following coolant hoses: <LI type=1>Upper radiator hose. Refer to Radiator Hose Replacement (http://service.gm.com/servlets/CellHandler?CellId=37216&RefDoc=332389&evc=sm) . <LI type=1>Both heater hoses. Refer to Heater Hoses Replacement (http://service.gm.com/servlets/CellHandler?CellId=48199&RefDoc=332389&evc=sm) in Engine Cooling. <LI type=1>Water pump inlet hose. Refer to Hot Water Bypass Valve Replacement (http://service.gm.com/servlets/CellHandler?CellId=48200&RefDoc=332389&evc=sm) in Engine Cooling. <LI type=1>Disconnect all electrical connectors and secure out of the way. <LI type=1>Remove the distributor. Refer to Distributor Replacement (http://service.gm.com/servlets/CellHandler?CellId=37700&RefDoc=332389&evc=sm) in Engine Electrical. <LI type=1>Use a twisting motion to remove the vacuum brake booster hose, if equipped. <LI type=1>Disconnect the accelerator control cable and the cruise control cable, if equipped. Refer to Accelerator Controls Cable Replacement in Engine Controls. <LI type=1>Remove the drive belt. Refer to Drive Belt Replacement (http://service.gm.com/servlets/CellHandler?CellId=44166&RefDoc=332389&evc=sm) . Important: It is not necessary to discharge the A/C refrigerant.


<LI type=1>Remove the air conditioning (A/C) compressor, if equipped, and set the A/C compressor aside. Refer to Compressor Replacement (http://service.gm.com/servlets/CellHandler?CellId=49614&RefDoc=332389&evc=sm) .
http://service.gm.com/engif/000/000/317/317197.gif
http://service.gm.com/tif.gif (http://service.gm.com/servlets/RetrieveTif?pic=317197)
<LI type=1>Remove the PCV valve. <LI type=1>Disconnect the exhaust gas recirculation (EGR) pipe from the bracket and the front of the intake manifold. Refer to Secondary Air Injection (AIR) Check Valve/Pipe Replacement (http://service.gm.com/servlets/CellHandler?CellId=31381&RefDoc=332389&evc=sm) in Engine Controls. <LI type=1>Disconnect the fuel pipes from the rear of the intake manifold. Refer to Fuel Hose/Pipes Assembly Replacement (http://service.gm.com/servlets/CellHandler?CellId=31362&RefDoc=332389&evc=sm) in Engine Controls. <LI type=1>Disconnect the electrical connector from the power steering pump.
http://service.gm.com/engif/000/000/188/188295.gif
http://service.gm.com/tif.gif (http://service.gm.com/servlets/RetrieveTif?pic=188295)
<LI type=1>Remove the power steering bracket using the following procedure: <TABLE border=0><TBODY><TR><TD vAlign=top> • </TD><TD vAlign=top>Remove the power steering pump. Refer to Power Steering Pump Replacement (http://service.gm.com/servlets/CellHandler?CellId=54974&RefDoc=332389&evc=sm) in Power Steering. </TD></TR></TBODY></TABLE>
<TABLE border=0><TBODY><TR><TD vAlign=top> • </TD><TD vAlign=top>Remove the nut, then the bolts. </TD></TR></TBODY></TABLE>
<TABLE border=0><TBODY><TR><TD vAlign=top> • </TD><TD vAlign=top>Remove two nuts from the back of the power steering pump. </TD></TR></TBODY></TABLE>
<TABLE border=0><TBODY><TR><TD vAlign=top> • </TD><TD vAlign=top>Slide the power steering bracket forward, with the power steering pump still attached. </TD></TR></TBODY></TABLE>
<LI type=1>Disconnect the wiring bracket from the rear of the right cylinder head. <LI type=1>Remove the valve rocker arm covers. Refer to Valve Rocker Arm Cover Replacement (http://service.gm.com/servlets/CellHandler?CellId=44234&RefDoc=332389&evc=sm) . <LI type=1>Remove the intake manifold. Refer to Intake Manifold Removal .
Clean all surfaces. Refer to Intake Manifold Clean and Inspect .
<A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=332389&evc=sm&pubid=96&cellId=44227&mspsdsubkey=820#ss2-332389">Installation Procedure

<LI type=1>Install the intake manifold. Refer to Intake Manifold Installation . <LI type=1>Install the valve rocker arm covers Refer to Valve Rocker Arm Cover Installation (Right) and Valve Rocker Arm Cover Installation (Left) .
http://service.gm.com/engif/000/000/188/188295.gif
http://service.gm.com/tif.gif (http://service.gm.com/servlets/RetrieveTif?pic=188295)
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

<LI type=1>Install the power steering bracket using the following procedure: <TABLE border=0><TBODY><TR><TD vAlign=top> • </TD><TD vAlign=top>Install the power steering bracket onto the stud. </TD></TR></TBODY></TABLE>
<TABLE border=0><TBODY><TR><TD vAlign=top> • </TD><TD vAlign=top>Install the nut onto the stud finger tight. </TD></TR></TBODY></TABLE>
<TABLE border=0><TBODY><TR><TD vAlign=top> • </TD><TD vAlign=top>Install the three bolts finger tight. </TD></TR></TBODY></TABLE>
<TABLE border=0><TBODY><TR><TD vAlign=top> • </TD><TD vAlign=top>Install the two nuts to the back of the power steering pump.
Tighten
Tighten the nuts and the bolts to 41 N·m (30 lb ft).

</TD></TR></TBODY></TABLE>
<TABLE border=0><TBODY><TR><TD vAlign=top> • </TD><TD vAlign=top>Install the power steering pump. Refer to Power Steering Pump Replacement (http://service.gm.com/servlets/CellHandler?CellId=54974&RefDoc=332389&evc=sm) in Power Steering. </TD></TR></TBODY></TABLE>
<TABLE border=0><TBODY><TR><TD vAlign=top> • </TD><TD vAlign=top>Connect the electrical connector to the power steering pump. </TD></TR></TBODY></TABLE>
<TABLE border=0><TBODY><TR><TD vAlign=top> • </TD><TD vAlign=top>Connect the fuel pipes to the rear of the intake manifold. Refer to Fuel Hose/Pipes Assembly Replacement (http://service.gm.com/servlets/CellHandler?CellId=31362&RefDoc=332389&evc=sm) in Engine Controls. </TD></TR></TBODY></TABLE>
<TABLE border=0><TBODY><TR><TD vAlign=top> • </TD><TD vAlign=top>Connect the wiring bracket to the rear of the right cylinder head. </TD></TR></TBODY></TABLE>

http://service.gm.com/engif/000/000/317/317197.gif
http://service.gm.com/tif.gif (http://service.gm.com/servlets/RetrieveTif?pic=317197)
<LI type=1>Install the PCV valve. <LI type=1>Connect the exhaust gas recirculation (EGR) pipe to the bracket and the front of the intake manifold. Refer to Secondary Air Injection (AIR) Check Valve/Pipe Replacement (http://service.gm.com/servlets/CellHandler?CellId=31381&RefDoc=332389&evc=sm) in Engine Controls. <LI type=1>Use a twisting motion to install the vacuum brake booster hose, if equipped. <LI type=1>Install AIR check valve (crossover) pipe, if equiped. Refer to Secondary Air Injection (AIR) Check Valve/Pipe Replacement (http://service.gm.com/servlets/CellHandler?CellId=31381&RefDoc=332389&evc=sm) in Engine Controls.
http://service.gm.com/engif/000/000/179/179249.gif
http://service.gm.com/tif.gif (http://service.gm.com/servlets/RetrieveTif?pic=179249)
<LI type=1>Install the air conditioning (A/C) compressor onto the power steering bracket. <LI type=1>Install the A/C compressor bolts.
Tighten
Tighten the bolts to 50 N·m (37 lb ft).

<LI type=1>Install the drive belt. Refer to Drive Belt Replacement (http://service.gm.com/servlets/CellHandler?CellId=44166&RefDoc=332389&evc=sm) . <LI type=1>Connect the accelerator control cable and the cruise control cable, if equipped. Refer to Accelerator Controls Cable Replacement in Engine Controls. <LI type=1>Install the distributor. Refer to Distributor Replacement (http://service.gm.com/servlets/CellHandler?CellId=37700&RefDoc=332389&evc=sm) . <LI type=1>Connect all electrical connectors.
http://service.gm.com/engif/000/000/182/182853.gif
http://service.gm.com/tif.gif (http://service.gm.com/servlets/RetrieveTif?pic=182853)
Install the following coolant hoses. <TABLE border=0><TBODY><TR><TD vAlign=top> • </TD><TD vAlign=top>Upper radiator hose. Refer to Radiator Hose Replacement (http://service.gm.com/servlets/CellHandler?CellId=37216&RefDoc=332389&evc=sm) in Engine Cooling. </TD></TR></TBODY></TABLE>
<TABLE border=0><TBODY><TR><TD vAlign=top> • </TD><TD vAlign=top>Both heater hoses. Refer to Heater Hoses Replacement (http://service.gm.com/servlets/CellHandler?CellId=48199&RefDoc=332389&evc=sm) in Engine Cooling. </TD></TR></TBODY></TABLE>
<TABLE border=0><TBODY><TR><TD vAlign=top> • </TD><TD vAlign=top>Water pump inlet. Refer to Hot Water Bypass Valve Replacement (http://service.gm.com/servlets/CellHandler?CellId=48200&RefDoc=332389&evc=sm) in Engine Cooling. </TD></TR></TBODY></TABLE>
<TABLE border=0><TBODY><TR><TD vAlign=top> • </TD><TD vAlign=top>Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls. </TD></TR></TBODY></TABLE>
<TABLE border=0><TBODY><TR><TD vAlign=top> • </TD><TD vAlign=top>Fill the cooling system with coolant. Refer to Draining and Filling Cooling System (http://service.gm.com/servlets/CellHandler?CellId=37226&RefDoc=332389&evc=sm) . </TD></TR></TBODY></TABLE>
<TABLE border=0><TBODY><TR><TD vAlign=top> • </TD><TD vAlign=top>Connect the battery negative cable. Refer to Battery Cable (http://service.gm.com/servlets/CellHandler?CellId=37471&RefDoc=332389&evc=sm) in Engine Electrical. </TD></TR></TBODY></TABLE>

I appreciate it.:cool2:

One more for the boy just getting off the short bus, please.
http://service.gm.com/servlets/BlobShtml?ShtmlFile=332389&evc=sm&pubid=96&cellId=44227&mspsdsubkey=820#ss2-332389

what was the link for?

It was suppose to be for intake manifold installation.

"Installation Procedure

Install the intake manifold. Refer to Intake Manifold Installation ."

Ah ok, I cant just click the link and have it go to the page


Intake Manifold Installation


http://service.gm.com/engif/000/000/038/38512.gif
http://service.gm.com/tif.gif (http://service.gm.com/servlets/RetrieveTif?pic=38512)
Notice: Apply the proper amount of the sealant when assembling this component. Excessive use of the sealant can prohibit the component from sealing properly. A component that is not sealed properly can leak leading to extensive engine damage.

Important: The lower intake manifold must be installed and the fasteners tightened while the adhesive is still wet to the touch.


<LI type=1>Apply a 4.0 mm (0.157 in) patch of adhesive GM P/N United States 12346141, GM P/N Canada 10953433, or equivalent, to the cylinder head side of the lower intake manifold gasket at each end. <LI type=1>Install the lower intake manifold gasket onto the cylinder head. Use the gasket locator pins in order to properly seat the lower intake manifold gasket onto the cylinder head.
http://service.gm.com/engif/000/000/026/26744.gif
http://service.gm.com/tif.gif (http://service.gm.com/servlets/RetrieveTif?pic=26744)
Notice: Apply the proper amount of the sealant when assembling this component. Excessive use of the sealant can prohibit the component from sealing properly. A component that is not sealed properly can leak leading to extensive engine damage.

Important: All sealing surfaces must be clean, free of oil, dirt, or any other foreign material.


<LI type=1>Apply a 5 mm (0.197 in) bead of adhesive GM P/N United States 12346141, GM P/N Canada 10953433, or equivalent, to the front top of the engine block. <LI type=1>Extend the adhesive bead 13 mm (0.50 in) onto the each lower intake manifold gasket.
http://service.gm.com/engif/000/000/026/26743.gif
http://service.gm.com/tif.gif (http://service.gm.com/servlets/RetrieveTif?pic=26743)
<LI type=1>Apply a 5 mm (0.197 in) bead of adhesive GM P/N United States 12346141, GM P/N Canada 10953433, or equivalent, to the rear top of the engine block. <LI type=1>Extend the adhesive bead 13 mm (0.50 in) onto each lower intake manifold gasket.
http://service.gm.com/engif/000/000/066/66456.gif
http://service.gm.com/tif.gif (http://service.gm.com/servlets/RetrieveTif?pic=66456)
<LI type=1>Install the lower intake manifold onto the engine block and the cylinder heads. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

<LI type=1>Apply threadlock GM P/N United States 12345382, GM P/N Canada 10953489, or equivalent, to the threads of the lower intake manifold bolts.
http://service.gm.com/engif/000/000/500/500689.gif
http://service.gm.com/tif.gif (http://service.gm.com/servlets/RetrieveTif?pic=500689)
Notice: Proper lower intake manifold fastener tightening sequence and torque is critical. Always follow the tightening sequence, and torque the intake manifold bolts using the 3 step method. Failing to do so may distort the crankshaft bearing bore alignment and cause damage to the crankshaft bearings.

<LI type=1>Install the lower intake manifold bolts.


Tighten <LI type=a>Tighten the bolts on the first pass in sequence (1-8) to 3 N·m (27 lb in). <LI type=a>Tighten the bolts on the second pass in sequence (1-8) to 12 N·m (106 lb in).
Tighten the bolts on the final pass in sequence (1-8) to 15 N·m (11 lb ft).

http://service.gm.com/engif/000/000/317/317211.gif
http://service.gm.com/tif.gif (http://service.gm.com/servlets/RetrieveTif?pic=317211)
<LI type=1>Connect the evaporative emission (EVAP) canister purge solenoid valve harness.
Push the elbow inward until the quick connect snaps into place.
Pull the elbow outward in order to ensure proper connection.

Exactly what I was looking for. Thanks.