Adakar

Thanks a lot for the reply

Do you replace just the intake mainfold gasket or replace the head cylinder gaskets too???

Cheers

casamtb

The general consensus is replace them all while you are there. Each gasket is like $8.

Adakar

Where?? here the gasket kit cost 375USD .........
Actually I´m searching on ebay but many sellers don´t combine shipping and the global shipping program is very expensive.......
Any store can recomend me?


Cheers

Rednroll

I would suggest doing the inexpensive simple fixes before moving onto the lower intake manifold gasket repair. LIM is not a simple repair.
1. Replace your radiator cap.
Yes, the problems you're experiencing could be related to the cap. It could cause small coolant leaks and lack of pressure in the system, which will all result in air bubbles being in the cooling system.
So replace that cap, top off the coolant, and then properly burp the system to remove any air out of it.
2. Replace your thermostat.
I would recommend doing both the cap and thermostat replacement at the same time. You could do them individually but since both will require you to top off the coolant level and burp the system, you could kill 2 birds with 1 stone.

Then see where things are after those fixes. Next items to trouble shoot if still not fixed.

3. Pressure test the system to identify any leaks.
- Radiator end cap leaks are a common one. Might need to replace the radiator.
4. Inspect for coolant leaks around lower intake manifold gasket.

So that LIM although being a potential problem, should be on the bottom of your list of fixes.

ronjenx

If the OP's Jeep is the one in his avatar, I don't see much room for air to get through the grill.

Rednroll

In regards to properly burping the coolant system, there's a couple effective methods.

1. purchase a vacuum pump setup

2. The free method.
- Put heater on high, and blowers to full on.
- Raise the front end so that the radiator cap is the highest point of the cooling system (air always travels to highest point of elevation).
- Run vehicle with rad cap off.
- Squeeze top radiator hose to burp/push air out of the system.
- Continuously fill radiator to top with coolant

Rednroll

Excellent point as well!!!

Adakar

Hi
Thanks for the help
Yes is the one in my avatar, but never give me problems, install the front bumper and lights mmmmmm 2 years ago?
I´m gonna check all the simple fixes first
And gonna check for coolant leaks in the gasket.
I really apreciate the help.

Adakar

Hi Again
I found a video on youtube


Is this the lower intake manifold gasket?

Cheers

Rednroll

Yes, that's it.
Here's a couple additional 3.8L LIM replacement videos I followed when I replaced mine. When you do the lower, you might as well do the upper intake gaskets as well.