oil leak - Team Camaro Tech
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post #1 of 11 (permalink) Old Jan 8th, 05, 03:08 PM Thread Starter
 
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I had my 400 SB bored .30 over rebuilt last year. I am constantly getting oil out of almost all my plugs. Without having to pull the motor out again and have it broke down, where else can I start. It has been mentioned that it sounds like the rings were not lined up properly, but I was also told to look at valve stem seals. ??
I am not the greatest at this and need some breakdowns. Email me at [email protected].
Thanks!
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post #2 of 11 (permalink) Old Jan 8th, 05, 06:20 PM
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Jim
 
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need more details... often, oily plug threads are just because the plugs are too cold a heat range.

run a compression test. Does the motor ever smoke, and under what conditions? how much oil does it use? pull the pcv valve and check for blowby... let us know.





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post #3 of 11 (permalink) Old Jan 8th, 05, 07:27 PM Thread Starter
 
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The motor does not smoke. Only time it smokes is when you get on it. It does not go through alot of oil, just the constant leak and drips on the garage. Just about every plug drips with oil. What did you mean by too cold a heat range also?
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post #4 of 11 (permalink) Old Jan 9th, 05, 04:47 AM
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Plugs have numbers, they vary by manufacturer, that denote "how fast the plug transfers heat"

A "standard AC smallblock plug would be an R44. If I'm remembering corractly, an R45 would be a lil colder (transfer heat faster so the plug itself doesn't get as hot" and an R43 would be a lil hotter. If I got this backwards, I'm sure someone will be quick to correct me.

If the plugs heat range is correct for the application (and the motors not burning oil, the jetting and timing are correct, ect etc.) the plugs insulator will be a light tan color and the electrodes will be "clean."

If the plug is too "hot", the insulator will be white and it will (eventually) just burn up.

If it's too "cold" deposits that are normal for the cumbustion process will not burn off as they should, causing the plug to gunk up. Often, this will let oily stuff work it's way upthe threads.

*** spark plug heat range is only one of many variables in combustion. Using the wrong heat range can either mask or cuase other problems.





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post #5 of 11 (permalink) Old Jan 9th, 05, 05:05 AM Thread Starter
 
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So the temp of it would cause all the plugs holes to leak oil onto the block?
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post #6 of 11 (permalink) Old Jan 9th, 05, 05:31 AM
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could... especially if it's all 8, the valve covers aren't leaking, there's no blowby, and it ain't using oil.

Check the other stuff FIRST, compression and blowby check. Oil drain holes clogged in the heads can cause too much oil to pass the guides, too. What do the plugs look like?





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post #7 of 11 (permalink) Old Jan 9th, 05, 11:37 AM Thread Starter
 
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black, dripping oil
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post #8 of 11 (permalink) Old Jan 9th, 05, 12:07 PM
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That would be bad. All 8? Compression Test? u sure it ain't smoking & using oil? U said it'sa year old, how long has it been oiling the plugs?





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post #9 of 11 (permalink) Old Jan 9th, 05, 12:31 PM
 
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????

I have never heard of sparkplugs "dripping oil" on the outside of the motor???

They foul out and miss if they are too cold and you have an old oil burner/pumper for sure!

Are you sure you are using the correct plugs b/c the older heads use gasketed plugs and the newer ones tapered seat plugs.

I wonder if you have the wrong seated plugs in your motor and maybe that's why oil is getting past the sparkplug threads and leaking onto the ground?????

Do I even have this right??

pdq67

PS., 43 = colder, 44 = stock and 45 = hotter if I remember right?

AND as funny as this sounds, I always liked Autolites better the AC's!! It was as though they were a half heat number off sorta deal??? At least in my old motors years ago...



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post #10 of 11 (permalink) Old Jan 9th, 05, 01:06 PM
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I dunno, Paul. I've seen plugs oil up the threads and even all the way out sometimes. That's what I was figuring. Course we all remember one particuler incident, right? Like the guy who thought his car was hot sh*t and put 3 range colder plugs in it and it was jus pumpin oil out past the threads like there was no tomorrow, plug tips so cold the fire would hardy start, ya know?





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post #11 of 11 (permalink) Old Jan 14th, 05, 03:48 PM
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If oil is dripping off of the plugs onto the floor I don't believe for one minute that it is coming out the plug threads from inside the cylinders. I think that you have an external leak from the covers.

Bob
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