Ok will try and snap pix tomorrow.

On a small block chevy, you need to silicone the inside of the balancer snout as well. Otherwise, the oil will travel between the crank gear and balancer snout, then out the snout.

You'd really need to explain that one to me..... :>)



What I've always done is to use a little gasket sealer (never silicone since it will not stand up to oil and gas) on the keyway in the crank/balancer.

Also - what a lot of people FAIL to do, is to put a little oil on the balancer exterior surface that meets the SEAL ---- fail to do that and you ruin the seal surface on the first fire up.

Check the crankshaft sprocket key. I had the same problem you describe. Replaced the key and no more leak.

We used gm gray rtv on the balancer key, always have. Its not leaking from there. I know it from the seal and I'm almost 100% sure its due to excessive crank case pressure just finding the easiest way out.

As per request the pix of the pcv hose hook up.

http://i281.photobucket.com/albums/k...913_085916.jpg
http://i281.photobucket.com/albums/k...913_090052.jpg

Goes from pcv to port on carb base

Well that part looks okay to me...


Remember though -- once you've established a path for oil --- unless you reseal them and start fresh.


Did you pull a vacuum measurement from under the carb?? 5 to 7 inches sounds like you might have a big azz cam? Otherwise I would be wanting to see 10 to 17 inches.

If you don't have a big cam --- then you might want to perform a LEAK DOWN test and see where the issue is.

As far as I know the cam isn't huge. Gonna have him pull me specs. We checked for vacuum leaks and found none. The engine does have low mileage, less then 1000mi. Once he gets back from vacation ill jump back onto his truck and see what else we can find. Thx for the help and direction.

I had a similar problem with a front seal leak and it all boiled down to a bad front crankshaft bearing.

Sounds like the engine is unhealthy.