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Old 04-01-2012, 06:16 PM
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Ram Jet 502 OIL leak Head?

I have a Ram jet 502 in my 38 coupe. I am seeing a oil leak which appears to be coming from the head/block mating surface near the rear on the left side. What is puzzling is if I clean everything up and start the engine there is no leak. But if I take the car out for a 'spirited' drive, then park the car, I have oil drips on the trans pan and off the oil filter.
I have re-torqued the head (all bolts were good). I check the rear of the intake and that seal is good very dry. Changed oil filter (PF-454).
Looking for ideas.......

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Old 04-01-2012, 07:23 PM
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might be coming from back bottom of intake manifold
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Old 04-01-2012, 07:37 PM
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Might check the oil galley plugs down the side of the driver side oil pan rail.

I had a loose front plug on my 454HO that took a while to find.
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Old 04-02-2012, 06:43 PM
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It is not the intake, the oil galley plugs are all dry. I started the engine again tonite a reved it a few times, and let it run for 10 minutes or so. Prior to all of this I had cleaned everything around that area dry.
After running the engine, the machined pad on the block at the drivers rear side had a small amount of oil seeping from the area where it meets the head. Blotting a clean paper towel on the pad showed oil. I really cant figure this out.
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Old 04-02-2012, 07:03 PM
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Here is a photo of the spot of the leak. It is the machined pad directly under the rear plug.
[IMG][/IMG]
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Old 04-03-2012, 07:31 AM
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I had leaks like that on my 496 with Cometic gaskets. I got a light and finally proved to myself that oil was leaking between heads and block. I pulled the heads and fixed it. Cometic engineering determined that the solid cylinder rings did not compress. Combustion was leaking and pushing oil that seeped between layers out between heads and block. It took several weeks but they built me a new set with multiple layer combustion rings at no charge. Bummer that it was a new engine. Not knowing the outcome I used felpro 1017-1 to get back on the road but would not be afraid of using the new gaskets next time.
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Old 04-03-2012, 10:30 AM
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I have resisted answering this thread as I don't want to spread false information, but since Head Gaskets have come up I will chime in here-

While not the same Heads, as I think you are aware, I believe your Heads are made by Edelbrock for Chevrolet(same as the Edelbrock #60459, except 2.25" Valves)-anyway, I am having a BBC built by a very knowledgeable BBC builder, and he told me of this same type of problem when using AFR Heads on a BBC (leaking Head Gaskets)-

After he experienced the same issue, he started looking at the Heads closely, and realized that they didn't cast or mill in enough Oil Return on the Heads-he told me that he has seen this with other Heads too-and after he Mills the oil returns into the Heads, magically the leak goes away-

I'm not suggesting this is your problem, but sometimes you have to look beyond the symptom to find the illness-
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