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Jeep Wrangler YJ
YJ General Discussion
Advice on Compression Test Results
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<blockquote data-quote="Gilaguy23" data-source="post: 429930" data-attributes="member: 19498"><p>JeepJoe is right on the money with his words. Been my experience when a valve burns it leaves a kinda pie shaped divot missing. The head needs to come off and a valve job performed to do it right. valves lapped,seats cut if needed or replaced,that kinda thing. Not sure about just buying a rebuilt head as an option. Again, generally speaking the 4.0's are pretty indestructible and 180K isn't that high of mileage, but it really depends on how its been maintained and used since day one. if your losing oil, and looking at the wet underside you should be able to judge if that's where its going. If the engine is tired,rings,bearings, freshening up the top end does little good for a weak/worn bottom end and oil consumption may increase. Kinda up to you pending funds and what you need it for. The only vehicle DD or a toy that gets romped here and there.</p></blockquote><p></p>
[QUOTE="Gilaguy23, post: 429930, member: 19498"] JeepJoe is right on the money with his words. Been my experience when a valve burns it leaves a kinda pie shaped divot missing. The head needs to come off and a valve job performed to do it right. valves lapped,seats cut if needed or replaced,that kinda thing. Not sure about just buying a rebuilt head as an option. Again, generally speaking the 4.0's are pretty indestructible and 180K isn't that high of mileage, but it really depends on how its been maintained and used since day one. if your losing oil, and looking at the wet underside you should be able to judge if that's where its going. If the engine is tired,rings,bearings, freshening up the top end does little good for a weak/worn bottom end and oil consumption may increase. Kinda up to you pending funds and what you need it for. The only vehicle DD or a toy that gets romped here and there. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
Advice on Compression Test Results
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