Ok I have had three seals put in. In less than 15000 miles please someone tell me what is going on. Is there something I'm missing. It has 116k I can feel air from the blow by tube at idle and then at 1500rpm it feels the same. I'm lost and am about to sell it yes yes because of a seal. Need input thank you chad

 

No ideas

 

u have a groove in the shaft

 

So.what do I do about that how do I get it to stop leaking

 

Not sure what it could be but a groove would cause that. After you replace the seal it holds for a while and then starts to leak. The only real way to fix it is pull the crank and have it polished out, unless it is too deep. I did this on a gasser V8 I built for my jeep. It was either try that and pray for no leaks or replace the crank.

 

If the seal area on the crankshaft is scored or undersized, a simple and acceptable repair would be to buy a rear main seal kit that includes a wear sleeve. Press the sleeve onto the crankshaft and install the oversized seal that comes with it. Problem solved.

However, on a 3rd gen truck, I believe there is an o-ring between the rear of the engine block and the adapter plate. Unlike the older engines, the adapter plate is contacted by engine oil, and this o-ring can cause a leak that resembles a rear-main seal leak. I would check this first.

 

That is a good answer I will look in to that one thank you

 

Are there any oil galley plugs on the back of the block that could be leaking? Craig

 

The mechanic is going to use a smoke machine and find the leak so we will see