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914World.com _ 914World Garage _ pesky oil leaks...

Posted by: crash914 Mar 19 2007, 07:18 PM

ok, so I started to pull apart the motor to replace the base shims..

where is all this oil coming from?
my head nuts were loose, I think the oil was coming from the head stud to the case?

anyone else run across this? Attached Image

it looks like my cylinder was leaking also...

Posted by: crash914 Mar 19 2007, 07:21 PM

ARP studs,

finger tight in case, I think I forgot to use sealant on them..

Attached Image

cylinder base shim looks good, no leaks,

oil pump looks good, no leaks,

galley plugs look good, no leaks..

I am running a little rich though...

Posted by: crash914 Mar 19 2007, 07:24 PM

head shot...

Attached image(s)

Posted by: Pat Garvey Mar 19 2007, 08:09 PM

Did you torque the heads in the proper sequence?

I didn't & have cylinder head oil leak after 20 years ( minor, but major on a CW car). Took a shortcut - got burned.

It DOES leak. It DOES make a mess. I AM stupid. I WILL fix it this spring.

DUMB, DUMB, DUMB. Got expert advice. Didn't listen. Paying for it now.

Anyone know if you can change this seal/gasket without removing the motor?

Apologize for hijacking this thread.
Pat

Posted by: crash914 Mar 20 2007, 11:34 AM

bump....

Posted by: Matt Romanowski Mar 20 2007, 01:20 PM

Herb, It can also be a leak somewhere about and just leave the trail there due the movement on of the air. Found my oil leak last year - the top of a valve cover! Make sure your's are flat.

Posted by: crash914 Mar 20 2007, 04:34 PM

Matt, mine are flat, I also welded in a support to the gasket on the inside...remember my trail at NHIS??

I for sure had a cylinder to head leak, I am thinking that due to this I might also have been leaking out of the head stud to case area.

It might be hard to see in the pictures..thanks,

Posted by: McMark Mar 20 2007, 04:39 PM

Welding can cause warping in the valve covers.

Pat: Save the headache and remove the motor. You have to pull all the injection/tin off, not to mention that I doubt you could remove a head with the engine in the car. Don't solve a shortcut with a shortcut.

Posted by: crash914 Mar 20 2007, 06:05 PM

mark, motor is already out....

I did talk to Charles about the torque...
he did mention doing a re-torque. I guess I never did that...

I also cc'd the heads...does 80cc seem right???

look in the picture above..pretty deep cuts and port work...very large valves...

Posted by: Brando Mar 20 2007, 08:05 PM

80cc per chamber doesn't sound right. Sure it's not 40 and 40?

Check your rings. I've taken apart a few engines (not alot, i'm still a noob) that showed leaks similar to yours that had broken rings.

Posted by: Aaron Cox Mar 20 2007, 08:10 PM

you cc'd to the bottom of the head?

you only measure to the lip where the cyl sits

Posted by: crash914 Mar 21 2007, 05:20 AM

cylinders are coming off to replace base shims...

cc yes to the bottom of the relief...80cc's I need to verify,

this is a 103 motor, but this drops my CR to around 7 or 7.5....no good...

Posted by: Headrage Mar 21 2007, 08:39 AM

I don't know if I'm comparing apples to oranges here, but my /6 leaked from between the cylinder and case when the head was loose.