I'm having my head rebuilt on my 96 Jeep Cherokee Sport 4.0. The shop I dropped it off at did the vacuum test on it and said more then one valves were leaking or something like that. They also said that if they had to resurface the valves it might leak or burn oil...? It wasn't doing that before I dropped it off why would it do it after a rebuild? Im confused

 

Umm they sound stupid.. Unless they said you need new valve seals and you said no

pieced together on my iPhone using all the extra parts from my cherokee...

 

I no nothing about this process. I took it out, dropped it off and told them what was wrong and they said they would fix her up. I stopped by there today and been stressing what they told me.

 

The usual is to have the head resurfaced (milled, shaved), valve job (cleans and resurfaces to ensure good seal) and new valve seals (keeps oil from getting into combustion chamber) All this makes it as good as new. Almost forgot magnafluxing (checks the head for cracks) HTH.

 

yeah, exactly what im having them do. just don't know why he said it might leak or burn oil after lol.

 

It shouldn't. That's why they put new stem seals in.

 

Thank you sir.

 

Your welcome.