Wierd place for an oil leak? - Team Camaro Tech
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post #1 of 11 (permalink) Old Dec 26th, 08, 07:23 PM Thread Starter
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Tim
 
Join Date: Apr 2007
Location: Oklahoma
Posts: 137
Wierd place for an oil leak?

I'm in the middle of breaking in my new 383. It now has about 500 miles on the engine. I have a 2004r transmission. I have noticed a small amout of oil dripping off of the aft side of the flywheel (the side nearest the transmission).

I have felt around the valve covers and back of the intake which are both clean. From under the car I can see the one piece rear main seal which seems clean. I have an aluminum oil pan, but the car has been sitting for about a week (since it got cold and icy) and it continues to show a small amout of leakage despite removing it just a day or 2 earlier. The oil pan is on the front side of the flywheel and the leak is on the other side.

I know that the rear brass freeze plug was leaking a little antifreeze, but as the builder of the short block said, it appears to have stopped.

I just hate leaks!

Any thoughts or suggestions?

Tim
'68 RS 383 10:1 HR282 2004r Borla 3.73 posi

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post #2 of 11 (permalink) Old Dec 27th, 08, 06:21 AM
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clayton hicker
 
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Re: Wierd place for an oil leak?

mabe a front seal on the tranny? leaking down the input shaft.

clayton hicker
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post #3 of 11 (permalink) Old Dec 27th, 08, 09:13 AM
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Ted
 
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Re: Wierd place for an oil leak?

Could it be coming from the oil pressure sending unit port? Located on the block behind the intake manifold. Are you sure it's oil and not tranny fluid. Is the leak on the outside of the bellhousing or behind the flywheel with the dust cover off? If it's tranny fluid maybe a front seal.
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post #4 of 11 (permalink) Old Dec 27th, 08, 09:25 AM Thread Starter
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Tim
 
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Re: Wierd place for an oil leak?

Definitely oil and not tranny fluid. That's why it is so odd. The leak is running down the back side of the flywheel with the dust cover off. The side opposite the engine. That's why I'm confused. It's hard to see above that area and also from below but when it sits for a day or 2 a small line of engine oil develops and drips on the floor. It actually creates a small pool on the flywheel where the teeth are welded to the flywheel. Definitely oil!

Tim
'68 RS 383 10:1 HR282 2004r Borla 3.73 posi

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post #5 of 11 (permalink) Old Dec 27th, 08, 09:30 AM Thread Starter
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Tim
 
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Re: Wierd place for an oil leak?

Ya know, I am using the port near my oil filter for the sending unit. It was one of those electric rather than pressure style gauges. I'll have to check the original sending unit hole again. I do remember checking that spot a while ago and it was dry, but that was just after my initial break in.

Tim
'68 RS 383 10:1 HR282 2004r Borla 3.73 posi

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post #6 of 11 (permalink) Old Dec 27th, 08, 09:41 AM
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Ted
 
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Re: Wierd place for an oil leak?

Could it be coming from the base of the dist. (new gasket installed)? I had a similar leak around my oil pressure sending unit. If the intake or valve covers are alum., go around and retorque everything since the engine is just breaking in. I had alum. valve covers and one piece gaskets and still had a leak. I managed to get one of the engine bay wires to get caught under the valve cover. I hate leaks too.
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post #7 of 11 (permalink) Old Dec 27th, 08, 09:55 AM
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Alan
 
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Re: Wierd place for an oil leak?

When I went thru my dist., I installed a new gasket and it still leaked. A dab of silicone mounting the gasket to the dist. solved the leak.

alan
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post #8 of 11 (permalink) Old Dec 27th, 08, 12:14 PM Thread Starter
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Tim
 
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Location: Oklahoma
Posts: 137
Re: Wierd place for an oil leak?

MSD ready to run distributor. New gasket. Will check again.

Thanks Guys

Tim
'68 RS 383 10:1 HR282 2004r Borla 3.73 posi

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post #9 of 11 (permalink) Old Dec 27th, 08, 07:09 PM
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Tom
 
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Re: Wierd place for an oil leak?

It could be the cam plug on the back of the block.
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post #10 of 11 (permalink) Old Dec 27th, 08, 07:28 PM
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Re: Wierd place for an oil leak?

some 2 part rear seals are not a good design. could result from a little play in the crank if it was milled harsh. or been re faced in the back (too much taken off) but prob not, im just a beliver in murphy's law around my projects. good luck
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post #11 of 11 (permalink) Old Dec 28th, 08, 07:36 AM
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Patrick
 
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Re: Wierd place for an oil leak?

Quote:
Originally Posted by Oldrocker View Post
It could be the cam plug on the back of the block.
Just what I was thinking. Big cam plug or the 3 little plugs above the cam. I bet it's the big one though.

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