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Blow by and vapor leak

Posted: Sun Mar 19, 2017 10:25 am
by Pj_Marsh
Started me truck this morning, as I do, just to listen to it, and noticed a bit of white smoke being pulled around by the fan. It's coming from the front in the middle of the pulleys, and it looks like it's been happening for a while as that area is now shiny with oil. When I pop the oil cap off I get a lot of blow by and the smoke from the bottom stops- What do you guys reckon? Motor is a 12h-t that's been sitting for about 5 years before I popped it in me '40. Other things it does is smoke enthusiastically when cold

Re: Blow by and vapor leak

Posted: Tue Mar 21, 2017 4:17 pm
by Crash bandicoot
Valve stem seals or worn rings. if cold once they warm up the tolerance closes up

Re: Blow by and vapor leak

Posted: Wed Mar 22, 2017 8:15 am
by Pj_Marsh
I'll price up some rings, cheers crash. Reckon I should do a compression test first?

Re: Blow by and vapor leak

Posted: Wed Mar 22, 2017 7:31 pm
by Crash bandicoot
Pj_Marsh wrote:I'll price up some rings, cheers crash. Reckon I should do a compression test first?

Yep.