Ls1 oil leak
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Teching In
Joined: Mar 2016
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Ls1 oil leak Hi everyone my brothers 99 has a massive oil leak out of no where. It started smoking while driving and burning oil oil pressure dropped to under 30 and now it pours out it’s a manual car with 75k. Weird thing is the clutch went from being pretty much on the floor and very hard to light and sitting at a normal height after the leak. Does the rear main blow enough to cause a massive leak? Oil is all over the back of the motor. Going to put it up tomorrow to look just was trying for some suggestions.
Joined: Nov 2003
Posts: 6,216
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From: Wichita KS / Rancho San Diego
Sounds like the rear main. When mine went it formed a puddle of oil under the car, the bellhousing full of oil, oil everywhere.
Edit: This happened on my automatic car, so no slave cylinder as described below - which very well might be the case with your car.
Edit: This happened on my automatic car, so no slave cylinder as described below - which very well might be the case with your car.
Last edited by RevGTO; Feb 23, 2020 at 02:31 PM.
How is the level of the clutch hydraulic fluid???
I just went through a similar situation and it turned out to be a bad throwout bearing on the clutch. The odds of a "massive" leak sprouting out of our slave cylinder is much more likely than something going bad in the rear of the engine. (IMO) Either way, step #1 (if the fluid is coming out of the bell housing) is to drop the transmission.
My leak started slow and I assumed it was a leaking rear main. Over time the leak got much larger and continued to spew forth even then the engine wasn't running.
We all have Oil Pressure Sending Unit issues. This could be a normal thing that you are just now noticing. ...Or it could be an accurate indication of a problem.
This would not be weird for a leaking slave.
I don't drive my car very often and see that there have been people who have had issues with dirty hydraulic fluid. I never flushed my fluid and expect that my infrequent driving on top of that led to abusive treatment of the seals on my throwout bearing. (It almost lasted as long as my clutch. I probably had another 10K miles on the clutch when the bearing gave out.)
I just went through a similar situation and it turned out to be a bad throwout bearing on the clutch. The odds of a "massive" leak sprouting out of our slave cylinder is much more likely than something going bad in the rear of the engine. (IMO) Either way, step #1 (if the fluid is coming out of the bell housing) is to drop the transmission.
My leak started slow and I assumed it was a leaking rear main. Over time the leak got much larger and continued to spew forth even then the engine wasn't running.
We all have Oil Pressure Sending Unit issues. This could be a normal thing that you are just now noticing. ...Or it could be an accurate indication of a problem.
I don't drive my car very often and see that there have been people who have had issues with dirty hydraulic fluid. I never flushed my fluid and expect that my infrequent driving on top of that led to abusive treatment of the seals on my throwout bearing. (It almost lasted as long as my clutch. I probably had another 10K miles on the clutch when the bearing gave out.)
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Joined: Jan 2002
Posts: 877
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From: Poway, Ca. where GOD and the sun always shines
Pardon my French but it sure the hell would, I've seen oil pressure sensors fail quite a few times where they start to come apart leading to a massive oil leak and pressure loss.... That's the reason I suggested that it could be the problem.
