I have a situation of excessive crankcase pressure. Like...massively excessive. popping out the dipstick, and/or blowing off the valve cover vent line (that feeds fresh air INTO the engine) with a sound like a semi-truck venting brake line air, type pressure. The PCV has been replaced, but I noticed that the hose going from the valve to the intake is collapsing under vacuum. My first step will be to get a stiffer hose and see if that solves the problem, but I'm not holding out much hope.

A compression test is forthcoming to see if it's pistons/rings/head gasket related (I hope it's nothing along those lines) but I was wondering if there might be other issues I cold look for?? I did a search, but didn't find anything that seemed to relate (other that pistons/rings/ HG).

It's early, and I'm stressed (broke down 250 miles from home) so my mind is muddled and having a hard time thinking straight. If anyone has any ideas please share.

Thanks

 

Extreme blowby. Bad rings, pcv valve, scored cylinder walls.

Sounds like you need a rebuild.

 

Yeah, that was my first thought too, but it seems strange that it would happen all of a sudden. It was fine two days ago, then yesterday everything went sideways on me. Of course it has to happen when I'm hundreds of mile from home too.

Can you think of any way I can limp it home (~250 miles) without it spraying oil all over the engine bay?

 

Well...problem solved...after a fashion.

After a brief commiseration with a couple of local gear heads, the consensus was a buggered engine.:doah:

So I bought another truck off Craigslist. $700 for an 84 Xtra cab 2wd. The 77 will get towed home and the engine gone through over winter. The 84 has fewer things wrong with it, so eventually the two will swap engines and the 77 will go up for sale next spring/summer.:waytogo:

 

Well...problem solved...after a fashion.

After a brief commiseration with a couple of local gear heads, the consensus was a buggered engine.

So I bought another truck off Craigslist. $700 for an 84 Xtra cab 2wd. The 77 will get towed home and the engine gone through over winter. The 84 has fewer things wrong with it, so eventually the two will swap engines and the 77 will go up for sale next spring/summer.

 

Kinda bitter sweat ending..... or is it a begining???