87 4.0 Rebuild
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Member
Joined: Jan 2012
Posts: 113
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From: Centeral Valley CA
Year: 1987
Model: Cherokee
Engine: 4.0
Well she got 306783 miles on her and 3 lbs oil psi at 1k rpm. Time for a rebuild. I want to do a cam and valve job on her as well. Any good sugestions on a mid range cam and valve options?
Trick
Trick
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CF Veteran
Joined: Nov 2011
Posts: 2,433
Likes: 6
From: Northern MN
Year: 1990
Model: Cherokee (XJ)
Engine: Renix 4.0
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Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
I haven't a clue actually. I'm going stock Renix cam and ditching the Comp cam and associated valve springs in my build. 26,000 miles and the lifters were shot, cam had chatter marks on it and the lower parts of the cam bearings were mushed out. For 15 HP and 15 lb/ft of torque sacrificed, I'll go back together with a stock cam.


