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Discussion Starter · #1 ·
I have a 1985 Ford 351w bored .060 over in a 1989 Mustang LX
It got hot (245 degrees F)
I let it cool down and then drove it home
It felt like it was running off 5 or 6 cylinders
I removed the engine and found that #4 and 8 cylinder were wet looking maybe with oil
I haven't had the heads checked for cracks yet
I thought I would try to find out the problem before I tore down the heads for magnafluxing
Any info on what might have happened would be great
Thanks for the HELP
 

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Discussion Starter · #3 ·
351W

The oil is normal (no water or gas) I run Castrol Synthetic
I didn't do a compression test before I tore it down
The engine has less than 500 miles on it
I bought a short block and assembeled it myself
(This is my tenth engine to build)
When ever I installed the engine in the car for the first time, it leaked oil from the rear of the oil pan(so I thought)
I remove the engine and replaced the oil pan seal
That didn't fix the problem
I removed it again and put the second oil pan seal on it
It still leaked
I drove it for a week with it leaking when it got hot in the parking lot
I let it cool off and drove it home(less than 2 miles)
I thinkk that my oil leak was coming from my stock sheetmetal valve covers
The back 2 cylinders were oily when I removed the head
Could a vavle cover leaking down the head cause oil in the cylinders soaking thought the head gasket?
Thanks
Roger
 

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351w

not for sure on those engines i have one but you might have blown the head gasket and all its letting in is to much oil or you cracked the head and its leaking in threw the top down to the cylender dont quote me but hope it might help bye
 

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Was the engine that dirty that you couldn't tell the source of the oil leak?


No, I don't think the head gasket would soak up the oil.


What did the head gasket(s) look like, especially around the two bad cylinders.


Need to find out the source of overheating of course, what do you think it was, faulty thermostat, fuel delivery, timing or assembly?
 
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