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Old 04-23-2012, 06:43 PM   #1
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blown head gasket

So ive come to the conclusion that my head gasket is blown. Its got chocolate milk on the dip stick and it overheated on me yesterday. What are the main reason for this to happen besides the gasket just getting old and worn? Is there other things I should start looking for that may have caused this. Im going to attempt to replace it myself and I dont want it to happen again so I wanna get a jump on any other issues that may arise. Thanks for everyones help. This forum is definetly the best Ive been on as far as knowledge and advice

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Old 04-23-2012, 07:31 PM   #2
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Usually overheating in the first place. Make sure you get the head checked and check the block for warping. It's not too to do a head gasket swap. If it's your first time going that deep, just take notes along the way. While you are in there you might as well change out the lifters too.

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Old 04-23-2012, 08:07 PM   #3
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Take the head into a machine shop and have it decked. Otherwise if it is warped, wich it probably is, you will be back in the same boat. Just like Kboles said usually from overheating, but other things can cause it as well.
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Old 04-23-2012, 08:20 PM   #4
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I read something about the timing being off can cause the head gasket to go out as well. I recently just rewired my electric fan because the temp control box fried on it, I also put a new thermostat in and the water pump is not leaking. Im kind of at a dead end as far as why it would overheat. I dont want to run my engine up to temp to see if there is another problem with the fan cause im sure the head gasket it toast so I cant really diagnos it until I swap a new one it.
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Old 04-23-2012, 08:22 PM   #5
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you can take it to a shop and get a leakdown test done and that will tell you if it is the headgasket or not
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Old 04-23-2012, 09:33 PM   #6
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Quote:
Originally Posted by Norcal_Chris
you can take it to a shop and get a leakdown test done and that will tell you if it is the headgasket or not
Just get a pressure tester for the cooling system. That is what a leak down check is. Don't pay someone if you don't have to. In the previous post i meant decked and checked.
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Old 04-23-2012, 10:46 PM   #7
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If you do tear it apart, you should at least do some basic things to ensure the head lasts a long time. Have a machine shop check the head, pressure test the valves, and if necessary replace the worn out ones. Then resurface it, should last a long time.

Take notes as you tear it apart, pictures help out a lot too.
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Old 04-23-2012, 11:34 PM   #8
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If you have bubbling in the radiator, that gas can be checked for burned hydrocarbons. Positive means head is jacked up. Negative means you have an air leak. You may be ahead of me on this one. Good luck.
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Old 04-24-2012, 07:57 AM   #9
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Quote:
Originally Posted by bt-dub View Post
Im kind of at a dead end as far as why it would overheat.
There's really only 2 causes if your timing is in the ballpark (& it will run horribly if not, way before it overheats).

1. insufficient airflow.....either from too small a fan, restriction at highway speed, or fan not working.

2. insufficient coolant flow. Faulty thermostat (new ones can be bad, too)......or clogged radiator. If you know your pump to be good, then I'd do a reverse flush on the rad/cooling system w/ the cleaner stuff they sell at most autoparts stores.
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Old 04-24-2012, 08:05 AM   #10
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I just went through this as well. All of the advice above is good advice:

- Have the head inspected and planed down by a shop that can check it within tolerances
- Use an OEM gasket. There's a lot of cheap kits out there to do it but go with OEM.
- If you can, replace or upgrade cooling components when you do this. For the few hundred dollars you spend on new radiator and hoses, thermostat, water pump, etc. you won't have to do a tear down again to replace them if they fail later.

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Old 04-24-2012, 08:42 AM   #11
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Thanks for all the responses. Ive got alot of work ahead of me. hopefully everything is solved by summer. Many plans for camping and wheeling
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Old 04-24-2012, 10:11 AM   #12
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Do a compression check, that should let you know pretty quick. You can also put the cylinder at TDC and put an air hose snug into the spark plug hole and leave the radiator cap off, you will see some bubbling.

With the head off, make sure you get a valve job too. Even around here where stuff is crazy expensive, it was only an extra $85 for the valve job. You won't get a better bang for the buck as far as power goes.
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Old 04-24-2012, 10:40 AM   #13
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Above advice is all good and you may already know this but, just incase. Don't let the engine sit with water in your crankcase or it will lock up. It don't take long for everything to rust up. Also, if you run it even just a little trying to find out overheating problen, it will lock up causing damage to the lower end. Basically your oil is now water and you have no lubrication.

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