I am about to put a head on my dad's 4.0. Valve job is $200 and mill the head flat is $75.

Distilled water picked up last night was 93 CENTS per gallon. I got 4 gallons for $4. Put two gallons of water with two gallons of coolant gives you 4 gallons...All for about $22 total for a clean motor.

I would say its the rear freeze plug. It has one on the back of the head. I don't need pics to see the head sitting on the bench. I just finished porting it for dad. It has a plug on the rear for certain.

 

$200 for one Head!!! Buddy just had both on his 350 done for that! It included Milling and valve work! It could be because your location.

 

Or it could be because the machine shop can probably do GM heads with their eyes closed, while the 4.0L heads aren't seen nearly as often.

$200 is a good price IMO.

 

Does anyone know for sure if there are freeze plugs behind the flywheel/flexplate? I would hate to rebuild that head and have the well water eat another plug in a week or two. I think to be safe he should replace them all. JMHO though.

 

I ain't worried about the others, well water ain't ever hurt any other cars of ours. So i'm thinking it is something else. But thank for the advice don't want anyone thinks I just because I'm young I think I know everything.

 

I can't remember about the block for certain. And I don't have a 4.0 on the stand.

Not the best picture in the world...

http://images.google.com/imgres?imgu...icial%26sa%3DG

It does NOT show a brass plug in the back of the block...only in the head.

I believe there is two pipe thread plugs in there on the rear of the block...but not a freeze plug.

The only plug I know of is on the rear of the head.

As for 200 for machine. The valve job around here includes. Removing valves...Cleaning them of all carbon. Hot tanking the head. Grinding the valves and head either 3 OR 5 angle. Then painting the head. Then they balance the load on the springs with shims...Then reassemble the head with springs, shims, NEW valve seals.

Honestly for 200 bucks...that is one hell of a deal. And like said above. 350s are a dime a dozen. Shops run 50 chevys a week and ONE jeep head a YEAR. Setup time takes money from their pocket...but chevy guys pay 200 also. Its a flat rate.

 

We went and check out a head shop today. They will do the valves for $75, pessure test for 38.50, and mil for 38.50. That doesn't include the seals but still cheaper than $275.

 

You can get a reman head for cheaper..Where I bought my motor the heads are $175 w/$115 core charge not sure what shipping would be but might be easier and cheaper..call city motor supply web site is citymotorsupply.com. Might be worth checking as you'd get a complete head..pop yours off put this on ship back and be all done..no need for any additional work behind the machine shop work..Anyways just another option and these guys do damn good work.

 

writeup about freeze plugs and there are two in the rear of the motor..

http://go.jeep-xj.info/HowtoWelshPlugs2.htm

 

It's the one on the head.

 

Someone with an FSM I need the torque Pattern for a 98 4.0L head A diagram would help.

 

I just checked a bookmark i had that had the FSM's available as a download... it seems they took it down.

I have a FSM in garage, if a 94 head has the same sequence i could post it up. Anyone know?

 

Please note that PDF FSM's are not allowed here on CF.

 

Understood. Was going to post a shot of the sequence, not a link to the download.

 

If you could give me an indepth explaintoin it would be fine.