1985 - most common oil leaks?
Thread Starter
Instructor
Joined: Apr 2022
Posts: 181
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From: Oregon
1985 - most common oil leaks?
I recently purchased an 85 with 30,000 miles on it. It has been dripping a bit of oil. When I got under it on Tuesday, it was dripping pretty significantly from the clutch dust cover, and oil had covered the bottom of the trans. It looks like my oil leak has increased as I have put more miles on it. I did replace both of the oil sending units by the distributor, as they were leaking.
It is really hard to see the area by the rear china wall on the intake, so I am not sure if it is leaking there. Which area is most likely my issue, so I can concentrate my efforts there first - rear main, or intake? I should also note that there has been a small amount of coolant on the front of the intake by the water passage. I replaced the thermostat and gasket and that did not cure the leak. Checked the front two intake bolts near there and was able to snug them up a bit.
Right now, I’m thinking I may need to pull the intake and reseal it. Is it possible to determine if the rear main is leaking without dropping the trans?
It is really hard to see the area by the rear china wall on the intake, so I am not sure if it is leaking there. Which area is most likely my issue, so I can concentrate my efforts there first - rear main, or intake? I should also note that there has been a small amount of coolant on the front of the intake by the water passage. I replaced the thermostat and gasket and that did not cure the leak. Checked the front two intake bolts near there and was able to snug them up a bit.
Right now, I’m thinking I may need to pull the intake and reseal it. Is it possible to determine if the rear main is leaking without dropping the trans?
Team Owner
Joined: Sep 2001
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From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
2 piece rear main seal, valve covers, sometimes the back of the intake manifold. Usually its the first two.
Melting Slicks
Joined: May 2014
Posts: 2,897
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From: New Port Richey FL
Since you say you have the pool of coolant cut through the chase pull the intake and reseal it and, with it out of the way if the China wall was leaking you will have a good view. You may get a 2 for 1 repair out of it
Thread Starter
Instructor
Joined: Apr 2022
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From: Oregon
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