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08-22-2011, 10:36 AM
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#1 (permalink) |
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Diesel Specialist
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please help, crankshaft position sensor 8.1l
I have an 2002 8.1 and I finally got my old crankshaft sensor out and purchased a new one from a NAPA store. The new one looks a little different, it has one o-ring at the top, instead of two like the original one and the part where the plug goes in turned in a different direction, just wondering if this is what its supposed to look like, I really don’t want to put it in if it’s the wrong one. Also did you guys put anything on that bolt that holds it in place, like a glue or anything, I thought I read that somewhere. thanks
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2002 Silverado 2500HD 496 BB ZF-6-speed BROTHERHOOD OF HANDSHAKERS CLUB #121 REG CAB CLUB MEMBER #69 John Deere 4640 John Deere 6620 Turbo Farmall 200-grandpa's A lot of other GREEN equipment 
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08-23-2011, 12:29 AM
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#2 (permalink) |
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Diesel Specialist
Join Date: Jan 2009
Location: Missouri
Posts: 602
iTrader Score: 0 reviews
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call gm and have the PN cross referenced. i know the CKP sensor was updated. and i believe you use blue loctite on the bolt.
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02' Chevy 2500HD 496/Ally,EC/LB,4x4,3.73,07 tow mirrors,3" lift, 33" BFG,EFI LIVE self-tuned, AirRaid CAI,180' t-stat, .045 A/C Irridiums,MSD plug wires,Comp Cams 1.72:1 Roller-Tip rockers,Trick-Flo push rods,SW 1 7/8 LongTube Headers,Magnaflow Tru-X muffler,Magnaflow high-flow cats,dual 3" with 4" Silverline tips,Mag-Hytec diff cover and tranny pan,Detroit Trutrac Posi in rear, BBK TB back in the box-for now New 8.1 with Raylar heads: build in progress 94' Chevy S10 2.2L/5spd RC/LB 2WD 71' Chevy C-10 402BBC/T400 RC/LB 2wd 72' Chevy C-20 402BBC/T400 RC/LB 2wd Cheyenne Super Bigger Bore. Longer Stroke. Chevy Big Block  U.S. Marine Corps 0331 Infantry Heavy Machinegunner 06'-Present OIF VET |
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08-23-2011, 01:31 PM
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#3 (permalink) |
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Diesel Specialist
Join Date: Mar 2006
Location: Magnolia, TX
Posts: 955
iTrader Score: 0 reviews
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This is the one you should have from NAPA:
https://www.napaonline.com/Catalog/C...215905818&An=0 If it has the same overall size and the plug connects the same you can use it. There's only one sensor in GM like the 8.1's. Some things on this particular sensor like number of o-rings and angle of connector aren't critical as long as it still fits properly and works right. Make sure the harness is clear of anything after installed and pluged in allowing for 1 inch of movement in any direction. Vernon
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2001 Siverado 2500 HD SBCC in Black GM Vortec 8100, Allison, 3.73, 4X4 Show mods: Goodmark SS cowl hood, Ranch Hand bumpers, black toolbox, full tint, 10" subs, amps. Go mods: E85 fueled, Volant with home made ram air, BBK 80mm TB, Granetelli MAF, Marine Injectors, Hypertech, Bosch Fusion Iridium Plugs, Magnaflow 3" dual in X-path dual out muffler and tail pipes, Goodyear Wranger ATS 275's on 17" H2's, Velvet Ride Shackles, Helwig rear anti-sway bar. Complete frame up front end rebuild with Cognito: Leveling Kit, HD tie-rods, P&I arm braces, sway-bar links. Rancho shocks, Energy suspension control arm bushings, Napa Chassis steering components, Specialty Alingnment Products pins & adjusters, GM torsion crossmember bushings. Last edited by Manic Mechanic; 08-23-2011 at 01:33 PM. |
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08-24-2011, 09:23 AM
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#4 (permalink) |
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Diesel Specialist
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Thanks guys, I got it back in last night and it started right up and ran fine on my test drive. Ive seen on other forums that they say you have to get it re-flashed by a dealer. Is this true? if so can a local auto repair shop re-flash or do I have to take it to a dealer. It seems to be running fine and there are no warning lights on or anything so Im wondering if that has to be done?
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2002 Silverado 2500HD 496 BB ZF-6-speed BROTHERHOOD OF HANDSHAKERS CLUB #121 REG CAB CLUB MEMBER #69 John Deere 4640 John Deere 6620 Turbo Farmall 200-grandpa's A lot of other GREEN equipment
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08-24-2011, 10:57 AM
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#5 (permalink) |
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Diesel Specialist
Join Date: Jan 2009
Location: Missouri
Posts: 602
iTrader Score: 0 reviews
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when you replace the CKP sensor you are supposed to do a crankshaft variation relearn. but most dont and get away with it. if the shop has a tech II scan tool or efi live, those can do it.
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02' Chevy 2500HD 496/Ally,EC/LB,4x4,3.73,07 tow mirrors,3" lift, 33" BFG,EFI LIVE self-tuned, AirRaid CAI,180' t-stat, .045 A/C Irridiums,MSD plug wires,Comp Cams 1.72:1 Roller-Tip rockers,Trick-Flo push rods,SW 1 7/8 LongTube Headers,Magnaflow Tru-X muffler,Magnaflow high-flow cats,dual 3" with 4" Silverline tips,Mag-Hytec diff cover and tranny pan,Detroit Trutrac Posi in rear, BBK TB back in the box-for now New 8.1 with Raylar heads: build in progress 94' Chevy S10 2.2L/5spd RC/LB 2WD 71' Chevy C-10 402BBC/T400 RC/LB 2wd 72' Chevy C-20 402BBC/T400 RC/LB 2wd Cheyenne Super Bigger Bore. Longer Stroke. Chevy Big Block U.S. Marine Corps 0331 Infantry Heavy Machinegunner 06'-Present OIF VET Last edited by CHEVYHD496; 08-24-2011 at 10:57 AM. |
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08-24-2011, 11:02 AM
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#6 (permalink) | |
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Diesel Technician
Join Date: Feb 2010
Location: Broomfield, CO
Posts: 358
iTrader Score: 0 reviews
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Quote:
A CASE Relearn is required. EFI Live can do it. Scan tools that are capable of sending commands to the ECM/PCM can do it (ones that monitor or retrieve stream information only cannot). The dealer can do it for sure; but you'll pay for an hour of labor if you go there. You need to get it done though. Although it won't cause any problems per se, failure to do so can result in less-the-optimum misfire detection by the emissions system. Last edited by freecableguy; 08-24-2011 at 11:02 AM. |
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08-24-2011, 01:01 PM
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#7 (permalink) |
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Diesel Specialist
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My buddy says he has a tech 2 scan tool, so hopefully that'll do it. I really dont want to pay the stealership to do it, since it shouldve been recalled in the first place!
__________________
2002 Silverado 2500HD 496 BB ZF-6-speed BROTHERHOOD OF HANDSHAKERS CLUB #121 REG CAB CLUB MEMBER #69 John Deere 4640 John Deere 6620 Turbo Farmall 200-grandpa's A lot of other GREEN equipment
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08-24-2011, 11:29 PM
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#8 (permalink) | |
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Diesel Specialist
Join Date: Mar 2006
Location: Magnolia, TX
Posts: 955
iTrader Score: 0 reviews
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Quote:
Ha, it was. Vernon
__________________
2001 Siverado 2500 HD SBCC in Black GM Vortec 8100, Allison, 3.73, 4X4 Show mods: Goodmark SS cowl hood, Ranch Hand bumpers, black toolbox, full tint, 10" subs, amps. Go mods: E85 fueled, Volant with home made ram air, BBK 80mm TB, Granetelli MAF, Marine Injectors, Hypertech, Bosch Fusion Iridium Plugs, Magnaflow 3" dual in X-path dual out muffler and tail pipes, Goodyear Wranger ATS 275's on 17" H2's, Velvet Ride Shackles, Helwig rear anti-sway bar. Complete frame up front end rebuild with Cognito: Leveling Kit, HD tie-rods, P&I arm braces, sway-bar links. Rancho shocks, Energy suspension control arm bushings, Napa Chassis steering components, Specialty Alingnment Products pins & adjusters, GM torsion crossmember bushings. |
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08-25-2011, 11:07 AM
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#9 (permalink) | |
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Diesel Specialist
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Quote:
__________________
2002 Silverado 2500HD 496 BB ZF-6-speed BROTHERHOOD OF HANDSHAKERS CLUB #121 REG CAB CLUB MEMBER #69 John Deere 4640 John Deere 6620 Turbo Farmall 200-grandpa's A lot of other GREEN equipment
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08-25-2011, 12:16 PM
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#10 (permalink) |
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Diesel Specialist
Join Date: Mar 2006
Location: Magnolia, TX
Posts: 955
iTrader Score: 0 reviews
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If I remember correctly somebody on the forum said it was 2001-2002-1/2. I just looked it up and you're right, it was a 2001 only recall. How many miles did yours have on it? They all should be replaced every 100K in my opinion as maintainence.
By the way, your truck with 8.1 and ZF 6-speed is really rare. Enter your VIN at this web site to see what I mean. It's a GM VIN decoder with production figures. I don't know about 2002 but on in 2001 less than 800 6-speed HD's were built with the majority being 6.0's. Hang onto it. http://www.compnine.com/vid.php Vernon
__________________
2001 Siverado 2500 HD SBCC in Black GM Vortec 8100, Allison, 3.73, 4X4 Show mods: Goodmark SS cowl hood, Ranch Hand bumpers, black toolbox, full tint, 10" subs, amps. Go mods: E85 fueled, Volant with home made ram air, BBK 80mm TB, Granetelli MAF, Marine Injectors, Hypertech, Bosch Fusion Iridium Plugs, Magnaflow 3" dual in X-path dual out muffler and tail pipes, Goodyear Wranger ATS 275's on 17" H2's, Velvet Ride Shackles, Helwig rear anti-sway bar. Complete frame up front end rebuild with Cognito: Leveling Kit, HD tie-rods, P&I arm braces, sway-bar links. Rancho shocks, Energy suspension control arm bushings, Napa Chassis steering components, Specialty Alingnment Products pins & adjusters, GM torsion crossmember bushings. |
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