I think i fucked up my motor PLease help
10-12-2007, 04:15 PM
#1
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I think i fucked up my motor PLease help
ok well yesterday i was cleaning and re mounting my intake and i forgot to reinstall my wastegate line and well i got on the freeway to head out to a car meet and i got on it and noticed my oil pressure started bouncing everywere so i glanced at my boost gauge and it was higher then my normal 7lbs so i let off the gas and stayed under boost till i could get off the freeway and when i stopped the car i kept it running for a bit to let it cool down but when i stopped my freinds said i started blowing smoke my turbo is fine no shaft play so im pretty certain its not the turbo but at idle it kinda seems rough it still idles at the set idle just seems rough. also there is oil in the engine bay. i did notice today looking at it in the light that when i removed my ac pump i didnt replace the bolt that i have heard holds the front part of the oil pump in place so im hoping the oil im seeing is just coming out there and when i replace that bolt it stops. so what all do you guys suggest i look for? im gunna do a compressioon test also im gunna replace my plugs and im hoping thatll fix the rough idle and im hoping the compression numbers are fine. so heres the help i need. please tell me anything else i can check without tearing down the motor also what is the bolt thread pitch and size i need to put back in. i think someone said 10x1.25 40mm is that correct?
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10-12-2007, 04:46 PM
#3
If there is smoke alot of smoke you could have fubarred a piston, wich would have presurized the crank case and, blown a bunch of oil into the intake. Do the compression test first becouse if that is bad then, there is no point in replacing the bolt just yet as the motor needs to be pulled and repaired.
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10-12-2007, 04:50 PM
#4
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The bolt you need is M8-1.25 x 45mm. I ran without it for almost a year, and the quantity of oil that came out was fairly small. Not nearly enough to coat the engine bay, just enough to make me pull my hair out trying to figure out where it was coming from. Thought it was from my oil turbo oil return fitting initially, since that's where it was running down towards.
Sadly however I think our comrades may be correct. If you were running with no WG signal, then who knows how much pressure and heat were being produced. 15 PSI? 25 PSI? Pretty likely that the pistons have suffered for it. A compression test will reveal all.
Sadly however I think our comrades may be correct. If you were running with no WG signal, then who knows how much pressure and heat were being produced. 15 PSI? 25 PSI? Pretty likely that the pistons have suffered for it. A compression test will reveal all.
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10-12-2007, 04:51 PM
#5
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well that is true ok so the bouncing oil pressure was most likely it pinging ok. but the smoke out the pipe only happened during that pull after that it was smoke out from under the hood which smelled like burning oil.. which made me look more for the oil leak today. ok i will do the compressioon test what should my numbers be? also does anyone know exactly what size that bolt is ill need?
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10-12-2007, 05:36 PM
#12
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For what it's worth, the factory spec for compression on a 1.6 is 135-192 PSI on all four, with no more than 28 PSI variance between highest and lowest. In reality, we like to see numbers towards the higher end of this range and much closer together.
When doing the compression test, remove all four spark plugs and disconnect the igniter module. Also disconnect the plug that drives the fuel injectors or pull the INJ fuse from the box under the hood. While cranking, either have someone hold the throttle plate fully open, or use some zipties to achieve the same thing.
When doing the compression test, remove all four spark plugs and disconnect the igniter module. Also disconnect the plug that drives the fuel injectors or pull the INJ fuse from the box under the hood. While cranking, either have someone hold the throttle plate fully open, or use some zipties to achieve the same thing.
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10-16-2007, 10:10 PM
#20
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well i just tried to do my compression check on my own and found out the stupid check valve to release the pressure leaks on my tester so im gunna have a freind check it while i turn over the motor. and its not oil that was leaking its all my powering steering fluid. so now i have to find out if its from the pump or from the rack. but i bought a 40mm bolt and its to short they have no 45 the next closest was 50 but they were all out so maybe someone could buy a bolt for me and send it to me and ill send payment. but ill report back in a bit with compression numbers.
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