New to the board here is the rundown

[davisdrafting]

New to the board here is the rundown I was referred here from offroad.com



91 landcurser 3fe 4.0 I6

Compression results

..dry…wet....plug color on porcelain
1.155...........rusty look
2.115.130....Lt. gray
3.115.120....Lt. tan
4.140...........Lt. tan
5.110.120....Lt. tan
6.155...........rusty look


update:

cracks in cyl. no. 2 3 & 5 from gasket surface to ex. valve.
and crack in water port hence water in oil.

My rendition what happened
first of all I bought the LC at auction so I know nothing about it.
I believe that the radiator or water pump went out hence new pump an radiator
the 3FE was over heated, causing center 2 3&5 (probably 4 need a magnaflux) to crack in the head leaving cyl. no. 1&6 in good shape.
Strange roughness in cyl. no. 2 3 &5 noticed, caused by running with cracks.
happing on ex. stroke reliving internal pressure by crack’s letting coolant
spray across exiting hot gasses vaporizing coolant and cleaning a portion
of the cyl. wall in a line directly across from crack causing pitting.

does this sound correct ?

 

[landtank]

You might try the 60/62 board as well as they have more experience with the older engines. While the 80s had them in the first couple years we are more in tuned to the new 24 valve engine.

 

[sixsracing]

Your explanation/story sounds about right. That's not the problem. If it was overheated that badly then you need to go inside to determine what can be saved. Good luck.