I just did some horsetrading for a 93 std cab 4X4 with 4.0 5sp. I knew the engine had some issues but for what I have in it, not a problem. When running, the exhaust is white steam and loaded with antifreeze.

My original thoughts are the head gaskets or possible cracked head. Is it possible that its the intake gaskets or something more simple than removing the heads?

I'm in the middle of tear it down. Well, just got the right valve cover off last night.

Any ideas??

 

The heads are known to crack between the valves into the water passages.

https://www.alabamacylinderhead.com/...ail.php?id=168

 

Could be the gaskets for the intake too

 

start from the top, work your way down till ya find the cause

 

I found one of the cause of the water leaks. The intake gasket back by cylinder 3 was green and the springs around the rocker arm shaft was coated with water. Turned the motor with out the spark plugs and water gushed from cylinder 2 and 3 (passenger side middle and rear).

This led me to believe that I had found the problem. GREAT!! Well for grins and giggles, I did a compression check. Cylinders 2, 3, 5 and 6 had between 105 to 110 PSI. That's good. But cylinders 1 and 4 are both around 50-60 psi. Being I've got the engine down this far, I'm gonna ahead and removing the head and check the valves and head for cracks.

 

Don't forget about warpage.

 

Warpage is the least of my problems. After removing the heads, I found that four of the six cylinders have this hair line crack between the valves.

Ya'll think it time for a set of new heads??

 

Check the link out in my first post, about the best price I have found for them.

 

Blhde, Thanks for the link. I looked today and can find a better deal either.

 

I smell clever spam. :) Bldhe Is that how it works?

Don, I don't know if you are looking for price or quality as the important factor here but there is different quality levels of the aftermarket heads. If you are looking for quality look at the "EQ" cylinder heads (ebay). I put a set on my 4.0 and the quality of the casting is superior to the standard heads.

Kevin

 

Maybe if I was in Alabama with 2 posts and no Sig.

You have to admit old man you looking fishy with no posts.

 

Guess I will have to work on that.
Been busy replacing cylinder heads and swapping suspension parts. :)

 

I can feel your pain, my moms expo is sucking coolant too.


Think im going to 5.0 my ranger, freshen my 4.0 and swap it in to hers.

 

Ya, I have the 5.0 itch too, but I need to get all my suspension mods done, so I just did the heads to keep it going for awhile. Let us know how the swap goes, always interested in hearing about them.

Kevin

 

I have had the expo parts for over 2 years now, I may do it this summer finally. My torque converter is forcing my hand in pulling the trans.
http://smg.photobucket.com/albums/v4...cpZZ1QQtppZZ36