another head gasket?

[muddeprived]

It never ends......

I just had the head and gasket replaced on the 01 xj and now my TJ has oil in the coolant and runs low oil pressure when you stop. I just switched to synthetic a few months ago and I'm thinking it cleaned out all the gunk and now the gasket is swiss cheese. Sound like the head gasket?

[Super Scout]

Impossible, synthetic oil is the greatest substance on earth and couldnt cause any problems on your jeep EVER. My pet Rabbit died, I soaked in Mobil 1 and it came back to life !!!!! No lie.

Sounds like a head a gasket to me.... That does blow.

[DMG]

It sounds like the head gasket but there is no way that synthetic oil caused it. Most automotive oil has the same basic detergent/additive packages, synthetic or not. And if gunk was holding your head gasket together it would be more likely washed out by a coolant flush.

What you are describing sounds more like a crack in an oil gallery in the block or head but a head gasket is possible. Has it been overheated?

[Azzy]

0331 head? Look for a crack.

[muddeprived]

It sounds like the head gasket but there is no way that synthetic oil caused it. Most automotive oil has the same basic detergent/additive packages, synthetic or not. And if gunk was holding your head gasket together it would be more likely washed out by a coolant flush.

What you are describing sounds more like a crack in an oil gallery in the block or head but a head gasket is possible. Has it been overheated?

Never overheated or passed 210.

[DMG]

0331 head? Look for a crack.

I think it is a 4 cylinder

[muddeprived]

Yeah it's a 4 cyl. I'm taking it to Whitey's in BF and they will put it on the machine and run some tests on Wednesday to see what's up.

[Azzy]

I think it is a 4 cylinder

There's the issue... go back to the spot where th e loud clunk happened and pick the 2 back up.

[muddeprived]

there's the issue... Go back to the spot where th e loud clunk happened and pick the 2 back up.

lol

[muddeprived]

Well the shop shot me an email today:

"Don put a mechanical oil pressure gauge in the Jeep. The lowest it reads is 10lbs. That's a little low, which isn't exceptionally abnormal. He recommends maybe changing the oil to a heavier oil.

No problem with head gasket.

Coolant is dirty, recommends changing the anti freeze."

I used mobil 1 synthetic 5w-30 high mileage oil during my last oil change and got the low oil pressure shortly after. I guess I'll just try some heavier oil. A coolant flush is in order as well.

[ridgerunner97]

Mobil Delvac 1300 Super in 15w-40 flavor. My 4.0 LOVES it and it is a quality oil. We run it in everything except my mother's new town and country and my brother's Honda Accord...

[muddeprived]

Mobil Delvac 1300 Super in 15w-40 flavor. My 4.0 LOVES it and it is a quality oil. We run it in everything except my mother's new town and country and my brother's Honda Accord...

This is what I just got from walmart along with a purolator filter. Gonna pour this in the xj but I got synth 10w-30 for the TJ. The XJ has worse oil pressure issues than the TJ so i'll see how it works in there. Both have 5w-30 in there now and prob why the oil pressure is low.