HOW DO I KNOW IF MY HEAD GASKET IS BLOWN OR THE SEAL IS BROKE

1998 Pontiac Bonneville

Tiny

ray9191

January, 15, 2012 AT 4:01 PM

I think my head gasket is blown but I cant tell for sure

11 Answers

Tiny

jacksprat

January, 15, 2012 AT 4:18 PM

What are the symptoms? Is it over heating? Is the oil mixing with coolant or vice versa?

Tiny

saturntech9

January, 15, 2012 AT 4:32 PM

You can use a chemical tester which you can rent at auto zone to see if you have a head gasket or cracked head issue.

Tiny

ray9191

January, 15, 2012 AT 4:34 PM

Its not over heating but I can see coolant come out the passenger everytime some one revs the car and I can smell it

Tiny

M_H_RITZEL

January, 15, 2012 AT 4:37 PM

If you don't have any water in your oil and vise versa auto zone also has a compression checker you can borrow to check the compression of each cylinder.

Tiny

saturntech9

January, 15, 2012 AT 5:10 PM

Where does compression come into play here?There talking about coolant. To find a blown head gasket you use a chemical tester to see if exhaust gases are entering the coolant from a bad head gasket. Where is the coolant coming from when you rev it up?If its just leaking coolant then I would use a coolant pressure tester to pressurize the cooling system. If you think its leaking coolant externally because of a bad head gasket or something like a cracked head you can use a cylinder leak down tester.I have used those to find exhaust ports leaking coolant from bad heads etc.

Tiny

ray9191

January, 15, 2012 AT 5:26 PM

Here is a pictue where it leaks from

Tiny

saturntech9

January, 15, 2012 AT 6:13 PM

What size engine do you have?

Tiny

ray9191

January, 15, 2012 AT 6:19 PM

It is 3.8l v6 3800 series

Tiny

M_H_RITZEL

January, 15, 2012 AT 7:20 PM

I see what your saying, After reading post again realized it was running all right just leaking fluid. Had one that kept missing from crack in cylinder wall.

Tiny

ray9191

January, 15, 2012 AT 11:53 PM

Yeah it does not over heat it just leaks and makes a little grinding but I replace the intake about 3 years ago this all started when my friend floored it going around a coroner

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