FML...fudge my luck! need opinions
Thread Starter
Seasoned Member
Joined: Jul 2009
Posts: 462
Likes: 0
From: mendocino County, CA707
Year: 91
Model: Cherokee
Engine: 4.0
was going to rebuild this engine....


but than i ran into this taring crap off.



funny thing is i kinda expected this.
should i ditch this one and wait for another cheap engine? idk but what i was thinking of just replacing what i have to inside the engine and just gring down everything that has rust on it


but than i ran into this taring crap off.




funny thing is i kinda expected this.

should i ditch this one and wait for another cheap engine? idk but what i was thinking of just replacing what i have to inside the engine and just gring down everything that has rust on it
CF Veteran
Joined: Mar 2009
Posts: 2,750
Likes: 3
From: Visalia, Kalifornia, ussa
Year: 1996
Model: Cherokee
Engine: 4.0
Whats the problem? Rust in a dried out coolant passage is normal. Dump the coolant from a brand new motor, let it sit for awile you will find the same thing.
Throw some atf in each cyl and let that sit n for awhile so when your turning it over it doesnt score the cyl walls to bad. Also if you have an air copressor you can get a cyl leak down tester and run a testr on each cyl to see how bad it is. Beside its just work and a little money to pull the head have it magna fluxed for cracks. It all depends if your trying to do it right or half way just to get by. if your doing it right as long as the crank is good the head has no cracks and the rods are good then the engine will work fine once its bored and surfaced, and the heads rebuilt. If you're just trying to do a garage job definatly buy a leak down tester and test it. That will tell you exactl whats wrong with that engine.
if you are doing a complete rebuild, the rust is nothing. have the block hot tanked. and like "new toy" said have all the other stuff done as well. do it once and do it right, you'll never have to go back in it.
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