Optic Bump Help

TurboJunkie · 03-06-2005, 02:37 PM

Well I have to change PMD so I thought I'd tackle this optic bump. I went to pictures but I can't tell where or what I'm looking at so I guess I must be an idiot but I need help. I have upper intake off to look for housing you guys are referring to but I don't see it? Can you help an illerate (< See) get through this. Go slow guys cause for some reason I could even follow the pictures.

Texas Diesel Guy · 03-06-2005, 02:53 PM

YOu should see 6- Torx25 head bolts that hold the top cover of the injection pump down. The top cover is where the optic sensor and fuel return hose plugs into the pump, it helps if you unplug both of these. Remove the 6 bolts, and hold the top cover of the pump over to the side, it won't go very far, there's wires going to the sensor inside. Inside the pump, you will see a large Torx40 head bolt, need a good bit that wont fall out or break on you to loosen it. Note carefully the position the optic sensor is in before you change it, even scribe a line with a screw driver on the side of the plate on the sensor so you know where you started. You want to slide the sensor to the pass side of the truck, just 1mm is plenty, then retorque the bolt to ~210in/lbs. Make sure the top cover gasket stays seated in the top cover, and replace the 6 bolts that hold it down, don't forget the ground strap to the PMD! plug in the optic sensor and replace the return line, put the upper intake back on and plug the IAT/MAP sensors in and your ready to go.

TurboJunkie · 03-06-2005, 05:12 PM

TDG,

Thanks again. Bump done. When fired up idled a little rough then seemed to do 3 little pulses in idle and it smoothed right out. Taking for a spin. Thanks again.

Texas Diesel Guy · 03-06-2005, 05:17 PM

Let us know what you think, once you get the hang of it, it can be done pretty quick and tuned to your liking.

gmctd · 03-06-2005, 05:48 PM

Is Stanadyne not marking the camring in the late IP's with the standard reference line?

Texas Diesel Guy · 03-06-2005, 05:53 PM

not 100% of them, I did an '04 pump last week without one at all, some of them are double scribed, and some of them the either the scribe mark or the bolt hole drilled for the bolt is a little off the mark. 90+% of pumps that have the updated cam ring have a scribe mark that is correct though.

Val · 03-06-2005, 07:33 PM

Just a curiosity, when I am done with adjustment, and after I re-torques the T40 bolt does the hole unit move to left or right if you help it with a screwdriver ?
I can rotate whole assembly on mine, is it normal ?

quantum mechanic · 03-06-2005, 07:58 PM

yes, your just moving the cam ring.

03-06-2005, 02:37 PM	#1
TurboJunkie Diesel Fanatic Join Date: Feb 2005 Location: Southeast Michigan Posts: 170 iTrader: (0)	Optic Bump Help Well I have to change PMD so I thought I'd tackle this optic bump. I went to pictures but I can't tell where or what I'm looking at so I guess I must be an idiot but I need help. I have upper intake off to look for housing you guys are referring to but I don't see it? Can you help an illerate (< See) get through this. Go slow guys cause for some reason I could even follow the pictures. __________________ 2000 K3500 CrewCab 4 x 4, 2.5 in Mandrel XOver, 3in DP,4in exhaust,6in tip , boost,EGT,Trans temp, Oil Temp, IAT(pre and post Water injection) gauges, PMD Cooler Relocated to bumper, Optic Bumped, Water Injection
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03-06-2005, 02:53 PM	#2
Texas Diesel Guy Diesel Fanatic Join Date: Jun 2004 Location: Ontario, Canada Posts: 2,950 iTrader: (0) Ontario Diesel Place Chapter Member	YOu should see 6- Torx25 head bolts that hold the top cover of the injection pump down. The top cover is where the optic sensor and fuel return hose plugs into the pump, it helps if you unplug both of these. Remove the 6 bolts, and hold the top cover of the pump over to the side, it won't go very far, there's wires going to the sensor inside. Inside the pump, you will see a large Torx40 head bolt, need a good bit that wont fall out or break on you to loosen it. Note carefully the position the optic sensor is in before you change it, even scribe a line with a screw driver on the side of the plate on the sensor so you know where you started. You want to slide the sensor to the pass side of the truck, just 1mm is plenty, then retorque the bolt to ~210in/lbs. Make sure the top cover gasket stays seated in the top cover, and replace the 6 bolts that hold it down, don't forget the ground strap to the PMD! plug in the optic sensor and replace the return line, put the upper intake back on and plug the IAT/MAP sensors in and your ready to go. __________________ *'95 VW Passat 1.9L Turbo Diesel 5-speed, fresh cylinder head, new turbo 1000km (~600mi)/tank!*
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03-06-2005, 05:12 PM	#3
TurboJunkie Diesel Fanatic Join Date: Feb 2005 Location: Southeast Michigan Posts: 170 iTrader: (0)	TDG, Thanks again. Bump done. When fired up idled a little rough then seemed to do 3 little pulses in idle and it smoothed right out. Taking for a spin. Thanks again. __________________ 2000 K3500 CrewCab 4 x 4, 2.5 in Mandrel XOver, 3in DP,4in exhaust,6in tip , boost,EGT,Trans temp, Oil Temp, IAT(pre and post Water injection) gauges, PMD Cooler Relocated to bumper, Optic Bumped, Water Injection
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03-06-2005, 05:17 PM	#4
Texas Diesel Guy Diesel Fanatic Join Date: Jun 2004 Location: Ontario, Canada Posts: 2,950 iTrader: (0) Ontario Diesel Place Chapter Member	Let us know what you think, once you get the hang of it, it can be done pretty quick and tuned to your liking. __________________ *'95 VW Passat 1.9L Turbo Diesel 5-speed, fresh cylinder head, new turbo 1000km (~600mi)/tank!*
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03-06-2005, 05:48 PM	#5
gmctd Diesel Fanatic Join Date: Mar 2004 Location: texas Posts: 6,872 iTrader: (0)	Is Stanadyne not marking the camring in the late IP's with the standard reference line? __________________ Look here-> GM 6.5 FAQ's <-Look here Welcome New Forum Member * 6.5 Diagnostic Checklist How to Search * Search Feature Please include your vehicle details in your signature line. Did you read the FAQ's and search before posting? tdp member #1505 - GMTDScan Tech, Autoenginuity help on-board...... 96 Dodge 3500 cc 2wd drw 3.54 6sp......89 GMC 3500 cc 6wd drw 4.10 4L80E 205 5.9CTD 12v TST#10 plt SBC 13"............6.5TD, EFI, DSG, Max-E-Tork v2.0 DODGE makes it - CUMMINS shakes it.....Charge-air cooled, 3.5" ss exhaust 6 in a row makes it go..........................5000"lbs torque to the ground
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03-06-2005, 05:53 PM	#6
Texas Diesel Guy Diesel Fanatic Join Date: Jun 2004 Location: Ontario, Canada Posts: 2,950 iTrader: (0) Ontario Diesel Place Chapter Member	not 100% of them, I did an '04 pump last week without one at all, some of them are double scribed, and some of them the either the scribe mark or the bolt hole drilled for the bolt is a little off the mark. 90+% of pumps that have the updated cam ring have a scribe mark that is correct though. __________________ *'95 VW Passat 1.9L Turbo Diesel 5-speed, fresh cylinder head, new turbo 1000km (~600mi)/tank!*
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03-06-2005, 07:33 PM	#7
Val Diesel Head Join Date: Feb 2005 Location: Minnesota Posts: 40 iTrader: (0)	Just a curiosity, when I am done with adjustment, and after I re-torques the T40 bolt does the hole unit move to left or right if you help it with a screwdriver ? I can rotate whole assembly on mine, is it normal ? __________________ Black '98 GMC K3500 Crew Cab, 4x4, dually, K&N, 4" exhaust, Remote PMD + #9 resistor, 2.50" mandrel crossover pipe, Heath Turbomaster, 4:10 gears === FOR SALE ===
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03-06-2005, 07:58 PM	#8
quantum mechanic Diesel Fanatic Join Date: Dec 2003 Location: heart of Texas is moving to new mexico Posts: 5,196 iTrader: (0)	yes, your just moving the cam ring. __________________ '96 K3500 srw CC, 4bt IC 929 cast .020" overbored, crank 3.794"' destroked, delta 202 cam, '98 WP, HO oil pump,OBDII/5068 IP '93 K2500 5spd 599 cast, ported dimond heads, ARP studs,Delta 206 cam, HO WP and Oil 4911 turned up '94 K3500 (repower?) '94 C2500 'brub, mostly stock ______________________________________ Need a scan or mechanic that knows the 6.5L EFI (505) 314-4335 in the ABQ
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