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Chevy/GMC 6.2L and 6.5L Discussion of Chevy and GMC Trucks with 6.2L and 6.5L Diesel Engines

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Ok withe thew great help from Crazy I finally got my starting and stalling problem fixed but now I have no oil pressure. I changed the OPS and now today I was heading out of town ans thwe oil pressure slowly dropped to allmost zero ... JOIN NOW TO REMOVE TRACER

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Old 01-05-2011, 10:04 AM
Mapleleafpete's Avatar
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Default low oil pressure!

Ok withe thew great help from Crazy I finally got my starting and stalling problem fixed but now I have no oil pressure. I changed the OPS and now today I was heading out of town ans thwe oil pressure slowly dropped to allmost zero or the red. Whwn ideling the check gauges lie came on but a shot of fuel and it went out. I'm heading back home in an hour or so and hope I make it back. Any ideas, ill pic up a oil pressue gauge and a T and see if I have pressure from amechanical gauge I guess mie even pic up a code reader

Mapleleafpete's Sig:1994 chev Silverado Off road package with a 6.5 no mods as of yet.
1993 chev with a 6.2 currently being parted out
1995 Dodge larami with a 12v shift kit/triple locker 4 inch exhaust, turbo kit.
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Old 01-05-2011, 12:56 PM
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First thing make sure you have oil in the motor sure you did that and check make sure oil cooler line didn't let go there good for it

you need to get some kind after market gauge to see for sure i wouldn't be driving intill you know what going on could be bad OPS not reading right could be bad oil filter i just had that happen to me few weeks ago i had oil pressure at idle but had good pressure going down the road other thing check is all grounds make there clean and tight

Crazy's Sig:Traded for 94 F-350 turbo blow the motor up little red
1997 3500 Ext Cab 2 Wheel Drive 300,000 plus miles New Trans with up grades for towing Rebuild Rear end 4:11 with
new axles,new injectors, 4" Exhaust , 5" tip, PMD Moved to front Bumper TM 18psi boost,,new LP,boost,EGT and trans gauges and Max E Tork T-Series
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Old 01-05-2011, 03:41 PM
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Thers lot of oil I just changed it and filter. The oil cooling lines were disconnected by the last owner, don't no why tho. Ill try the obvious 1st, the oil filter then move to the OPS its new but could be bad. What about the oil filter base,iset there a valve in it that can stick open and let the oil free flow without building up pressure. I was out of town and stop at canadian tire to get a mechanical gauge but they had none and was gonna get a code reader but they wanted 300 bucks. Want one tat does more than reads codes but not 300 bucks i
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Old 01-05-2011, 03:52 PM
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first was it ACDelco OPS if not it could have gone bad seen it many times

i have seen oil filter go bad

for code reader go to obd2 scan tool data log and diagnostics scanner for lap top
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Old 01-05-2011, 04:43 PM
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Where is the best place to hook up the mechanical oil guage
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Old 01-05-2011, 04:47 PM
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right where OPS is at just get brass fitting long enough with T and put OPS one side and gauge on the other side
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Old 01-05-2011, 04:56 PM
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I don't mean to sound stupid, OPS? And where is it located at?? Again thanks Crazy
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Old 01-05-2011, 05:06 PM
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OPS oil pressure switch and should be on of the head driver side rear on the inside head
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Old 01-05-2011, 05:08 PM
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is it a pain to get to?
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Old 01-05-2011, 05:25 PM
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it can be depending how big your hand are
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