Gonna pull the motor or pull the head?

 

Probably neither if we can do it! I'm goin Thurs. after my driving thing. Has anyone do one on the back of the head?

 

I seriously doubt you'll get the necessary clearance to install a new one. It's pretty tight to the firewall.

 

I know. If we pull the motor I'm goin to look for a JY one with lower miles. Mine has had a blown head gasket, burnt valve(still has it), replaced the water pump twice since we have had it(3 years), and two altenors. It has about 250,000 on it so a swap might be in order.

 

Ok just talked to daddy and he said if it is the freeze plug we are goin to go ahead and replace the fellowing: Freeze plug, Water pump, Rad. cap, and thermostat. To besure we have everything taken care of!

 

That's going to be the cheapest route until you figure if anything else was damaged. Get the head to the machine shop while you have it off to see if it warped when it overheated. Let them change the freeze plug while they have the head.
Blue

 

Might just want to pick up a good used cylinder head and eliminate the bad valve issue while your at it.

Having 250K miles on a 4.0L is generally nothing to worry about if it's seen routine maintenance.

Once the head is replaced you could do a compression and leak down test to get an idea on the lower ends condition.

 

May not pull the head! I know daddy doesn't want to! But we may just cant a good used head! IDK!

 

Unless it got hot enough to crack that head it will probably be Ok if you have them check it for warpage. They can mill it to get rid of the warpage if you have any. And have them put the freeze plug in while they have it. If you buy a JY head you may not end up with one any better that the head you have. Unless it goes to a machine shop anyway, you will never know what you are slapping on your motor.

 

i wouldnt go jy I would get one already checked and millied!

 

Am i the only one who caught the "burnt valve" issue?

Why put money into a head thats been possibly overheated and needs a valve job unless you planned a rebuild?

I'd be hitting a local yard and pulling valve covers. Find one that has minimal sludge buildup, grab a head gasket set and install it. Then you have a running engine again and can then diagnose it's condition to decide if further work/money is better spent on a replacement long block.

 

If it is a freeze plug I think Autozone had rubber ones you wedge in and then turn a bolt to make it expand. Get the plugs just in case. Then when you get to the Jeep pour water in and then feel where it's coming out. You'll probably need to get the old plug out because chances are it's still there. If there's any room at all to get to the plug that might be a way to at least get a temporary fix and get it home? The concept of the plug is a round disk of rubber in between two washers. Thw washers compress the rubber when its bolt is tightened. I don't know if I would trust it forever though. Then again my Toyota Supra (1988) is a non turbo. All Supra engines were plumbed for the turbo option. When the turbo option wasn't purchsed they put a rubber boot over the plumbing ay the block. That's all they put! It's like a rubber boot that would go on the end of a cane! It needs replaces every 3 years and always lets loose at the worst time. The boot is far less than the rubber freeze plug though! So if that rubber freexe plug is installed correctly I would trust it! Good luck!

 

Arleady got two plugs like that.

 

if i remember right, there are a total of 6 freeze plugs on the 4.0. there are 4 on the side, and 2 in back(one on the back of the head and one of the back of the block. the 4 on the side aren't 2 hard 2 get 2. just pull off the exhaust manifold, and intake. u will have plenty of space. since u say u can see it pouring from the passenger side, that would be the first place to look. it should be pretty easy 2 see, just look under where your exhaust manifold is, and u can see the freeze plugs. o and spend the money on real freeze plugs, those rubber fake ones are just if u are in a pinch, getting brass ones will last! i have over 265,000 miles on my motor, and i've had 2 change one freeze plug. it had a hole in it, but i never overheated. i changed it since i was putting on a header.

 

He is leaking on the passenger side.

Dude the exhaust manifold is on the Driver's side not the passengers. I don't know what kind of 4.0 you had but it wasnt from a Jeep Cherokee.