Jeep Garage  - Jeep Forum

Jeep Garage - Jeep Forum (
-   Grand Cherokee - WK (
-   -   Blown Head Gasket... (

Frankie 09-25-2009 11:56 AM

Blown Head Gasket...
I'm prob getting ahead of myself, but a couple people on the red site said that they think that I blew my head gasket!

Just wondering how I would able to tell for sure??


psycojeep 09-25-2009 12:01 PM

Re: Blown Head Gasket...
Water in the oil ( milky white ) alot of water / white smoke coming out the tail pipe

B.P.O.D 09-25-2009 12:04 PM

Re: Blown Head Gasket...
^^^ yeah frankie i saw ur other thread and saw the milky color. oil+ water mixed produce that. when my lower gasket on my boat engine leaked that's EXACTLY how my oil looked. take out your dip stick and see what color the oil is.

blackpepper 09-25-2009 12:48 PM

Re: Blown Head Gasket...
Thread link for everyone's reference?

scooter2131 09-25-2009 01:06 PM

Re: Blown Head Gasket...

blackpepper 09-25-2009 01:11 PM

Re: Blown Head Gasket...
O noes.. I've seen catch cans but that's new to me...

justa4banger 09-25-2009 01:55 PM

Re: Blown Head Gasket...
RUN A COMPRESSION TEST... Then run a leak down test. The leak down test is a bit more complex and will probably need to be done at a shop.

the compression test is easier and you can do it at home.
Here is the important thing to remember for a compression test.

FIRST pull all the plugs.
Wire the throttle boddy open (if DBW) then hold the accelerator down.
Do this when the engine is WARM or even hot (might suck to pull the plugs though)
Have a very good charge on the battery and crank for each cylinder for atleast 5 sec. on EACH cylinder.
Be sure to give the starter a break between cranks. it will get warm.

the ACTUAL numbers aren't as important as the difference in each number...
For example..... Take the lowest compression number and divide it by the other numbers. You should have less than 10% spread between cylinders. Basically if the LOWEST number is (example) 150psi, then 160psi is the HIGHEST number.
If you have ONE cylinder or 2 cylinders together that are low and the rest are higher, then theres a chance for a poped HG.

NOW with this explained... i'd be willing to bet your engine is fine.... the water and oil mixed in the catch can will happen in high humidity areas and given the right weather conditions. there was just condensation mixed up with the oil vapor. then it settled down into the CC and , now you have chocolate milk... I wouldn't sweat it.

Also 9 times out of 10 if you pop a HG there would be WHITE smoke HEAVILY pouring out the tail pipe.
Or there would be a coolant leak. Either way the coolant level would be dropping

If the coolant level in you ride is fine and has not dropped any... your engine is fine. Just keep on jeepin

sousa 09-25-2009 02:05 PM

Re: Blown Head Gasket...
First thing is drain the oil and see what color it is. Chocolate milk in the crankcase is almost a sure sign of a head gasket being blown.

B.P.O.D 09-25-2009 02:09 PM

Re: Blown Head Gasket...
^^^ that's exactly what i said too!!! you could also check your dip stick

5.7Unlimited 09-25-2009 02:40 PM

Re: Blown Head Gasket...
Hey OP< eventually all of the coolant will leak out and your temp guage will go up and down and up and down as air bubbles pass through, and your heat wont work. Also if you were to take off the rad cap there would be small bubbles or foam all in there expecially after driving it hard.

Scottina06 09-25-2009 06:09 PM

Re: Blown Head Gasket...
you can also have the oil tested to see if there are minute traces of coolant

Frankie 09-25-2009 06:16 PM

Re: Blown Head Gasket...
My coolant is almost empty!!!!!

Oil on the dipstick looks "normal" though!!!!

All times are GMT -5. The time now is 04:07 PM.

Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community