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Freshening up a 4.0 OHV


.38spl

Member
Joined
Feb 10, 2018
Messages
55
Reaction score
46
Points
18
Location
Lake Barkley, Kentucky
Vehicle Year
1987
Make / Model
Ford
Engine Type
2.9 V6
Engine Size
2.9
Transmission
Manual
2WD / 4WD
4WD
Total Lift
6”
Tire Size
33x12.50x15
My credo
James 1:19
I’m swapping an OHV4.0 from an Explorer into my 87 B2. Im in no hurry, and although the engine was driving in the vehicle prior to tear down, I plan on pulling it apart to check out the bearings, bored, etc, and to re-seal it. It has about 140,000 miles on it. Anything else 4.0 specific that I should look for while im in there?
 


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Dirtman

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Supporting Member
Joined
May 28, 2018
Messages
11,558
Reaction score
6,732
Points
113
Location
41N 75W
Total Lift
It's up there.
Total Drop
It's down there.
Tire Size
Round.
They are pretty basic engines and not really any known problems that I know of...
 

19Walt93

Well-known member
Ford Technician
V8 Engine Swap
Joined
Nov 13, 2018
Messages
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Reaction score
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Location
Canaan,NH
Vehicle Year
1993
Make / Model
Ford Ranger
Engine Type
V8
Engine Size
351
Transmission
Automatic
2WD / 4WD
2WD
My credo
If you don't have time to do it right will you have time to do it over?
A few had problems with heads cracking under the valve covers and oozing coolant into the oil like 2.9's did. The worse problem we had with 4.0 OHV's was oil leaking from the cork intake and valve cover gaskets which Ford eventually fixed with better gaskets.
 

.38spl

Member
Joined
Feb 10, 2018
Messages
55
Reaction score
46
Points
18
Location
Lake Barkley, Kentucky
Vehicle Year
1987
Make / Model
Ford
Engine Type
2.9 V6
Engine Size
2.9
Transmission
Manual
2WD / 4WD
4WD
Total Lift
6”
Tire Size
33x12.50x15
My credo
James 1:19
Thanks Dirtman and Walt. I know my way around a 2.9 pretty well, and thought that it was just a big 2.9. As for leaks, where I come from RTV is free, but oil is not. So there’s that!
 


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