Bad Oil Burn

[Thunder81]

Hey guys just wondering if you guys could help me troubleshoot something here. My AMC 258 i6 / 4.2l burns oil, a lot of it. Here's where it's at. On a cold start everything's ok. But after a minute or two she starts burning and keeps burning. It's not bad going down the road but at idle it's brutal. There isn't a whole lot of oil in my cylinders and they all test at 120 - 140 PSI for compression. My plugs get fowled after 1000miles or so with a lot of ash. What you think the problem most likely is? Rings? Valve seals? Guides? Any help would be great.

 

[Purple77CJ7]

You have good compression, so I would look at pulling the head and check valve seals and guides.

 

[CJim7]

With good compression, Im inclined to think its the guides.

 

[Old Dog]

Usually if the valve seals or guides are bad it will smoke at start-up.
I would check your pcv system to see if your sucking oil in there. Pull the hose off and see if theres oil in it.