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bad valve and what else?

lixar420

New Member
Joined
Jun 2, 2012
Messages
1
Reaction score
0
Points
0
Vehicle Year
1990
Make / Model
Ford
Transmission
Automatic
I swapped a 4.0 from a 92 explorer into my 90 bronco 2.
when i started it for the first time it was extreemly hard to start and smoked ALOT of white. i decided to take the heads off and see whats going on, i found a burnt exhausr valve in one cylider and tan colored cylinder walls in another. Iwas told that the valve is caused by a fuel issue but what caused on cyl to be a tan color and the rest to be shiny?
 


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rochhound

Member
Joined
Apr 30, 2010
Messages
53
Reaction score
0
Points
6
Location
arizona
Vehicle Year
1988
Make / Model
ford
Engine Size
4.0
Transmission
Manual
had the same issue with my 4.0 installed in my 1988,befor you go any further i suggest
you have the heads maged for cracks and checked for warpage. these heads are notorious for cracking and warping when over heated.
 

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