Top End Rebuild


srisitt

Member
Joined
Jun 1, 2019
Messages
58
Reaction score
8
Points
8
Location
Washington
Vehicle Year
1991
Make / Model
Ford Ranger
Transmission
Manual
So I have a leak at the cylinder head on a Ranger with 259k miles. Still runs well, fluids not mixing, compression feels good, and no smoke, so I think it’s just external. Still reliability is very important here, so I’m considering replacing the gasket.

It also has a tick when the engine is cold. Not a big deal, but if I’m replacing the head gasket I might as well replace some push rods and rocker arms.

Would it be worth going through the top end of an engine with this many miles? I’ve also heard that you don’t want to just rebuild top ends because it can cause issues like oil burning, is that true?
 
Last edited:


Rock Auto 5% Discount Code: 173A8B749AB83C Expires: January 1, 2020

Elutheros

Member
Supporting Member
U.S. Military - Veteran
V8 Engine Swap
Joined
Jul 11, 2011
Messages
504
Reaction score
24
Points
18
Location
Central Texas
Vehicle Year
1992
Make / Model
Ford
Engine Size
5.0
Transmission
Manual
I'm just ready to put the replacement heads on my 1991. My machine shop guy thinks the 4.0 is a multi hundred thousand mile engine so I'm going to press ahead with new heads and valve train. New rocker arms and pushrods are also being included. It costs about $350 plus to get bare new heads, a hundred $ to transfer all the valves and springs, another $275 in the parts and gaskets. Mine had remanufactured heads on it and they were patched up with incorrect size valve guides which resulted in leaking due to valves wobbling around--hence low compression and bad valve seats. Once I saw that I decided against remanned heads.
 

srisitt

Member
Joined
Jun 1, 2019
Messages
58
Reaction score
8
Points
8
Location
Washington
Vehicle Year
1991
Make / Model
Ford Ranger
Transmission
Manual
Also curious if there’s a way to check the condition of the bottom end without pulling the engine, or would a leak down/compression test be the best way to determine that?
 

black_demon69

Well-known member
Joined
Jun 30, 2013
Messages
1,307
Reaction score
52
Points
48
Location
AZ
Vehicle Year
1993 & 1994
Make / Model
Ford
Engine Size
2.3l & 4.0l
Transmission
Manual
just rebuilt my 4.0l ohv @about 206,000 because i was looking @ about $1000 too do the heads or $2000 to do the complete rebuild myself...

i could have just done the heads and probably been fine but I really don't want to go back into it for a very long time. lol
i am glad i did the rebuild it runs great..
 

sd359

New member
Joined
Mar 8, 2018
Messages
12
Reaction score
0
Points
1
Location
Rocky Mount, Va
Vehicle Year
1994
Make / Model
Ford
Engine Size
4.0
Transmission
Manual
I have 94 ranger 4.0 with 218,000 and have what seems to be head gasket or crack don't know which yet. I have a donor motor with 100,000. I can rework and switch heads but I think I am going to go through the spare motor and replace mine. I have been looking at prices depending on what all I change I will have to spend anywhere from about $1000-$2000 to rebuild the spare motor. If you have the cash I would do complete rebuild instead of top end.
 


Top