HOW TO KNOW IF I HAVE A BLOWN HEAD GASKET

  • Tiny
  • ray9191
  • 1998 Pontiac Bonneville
  • 240,000 miles

How can I tell if I have a blown head gasket in my 1998 pontiac bonneville

Tuesday, January 24th, 2012 AT 7:26 PM

14 Answers

  • Tiny
  • saturntech9
  • Expert
  • 28,434 posts

You can rent a chemical tester from auto zone and its really easy to use if it changes color you have exhaust gases in your coolant.

Was this
answer
helpful?
Yes
No
Tuesday, January 24th, 2012 AT 10:20 PM
  • Tiny
  • Wrenchtech
  • Expert
  • 19,586 posts

It can be very difficult to confirm. There are a number of test that can be performed including, chemical block test, cylinder leakdown test, coolant pressure test, exhaust analyzer to sniff for HCs at the radiator, observing white smoke out the exhaust or constant bubbling in the radiator. You would need to confirm it through a few different tests.

Was this
answer
helpful?
Yes
No
Tuesday, January 24th, 2012 AT 11:23 PM
  • Tiny
  • rasmataz
  • Member

Have it block and pressure tested

Was this
answer
helpful?
Yes
No
Tuesday, January 24th, 2012 AT 11:32 PM
  • Tiny
  • Wrenchtech
  • Expert
  • 19,586 posts

I posted a fairly log answer to this earlier but apparently it never posted although it did start sending me notifications of other responses.

Was this
answer
helpful?
Yes
No
Wednesday, January 25th, 2012 AT 2:10 AM
  • Tiny
  • ray9191
  • Member

I see a coolant leak and I only see white smoke when I 1st start my car than it goes a way here is a picture of where it leaks from

Was this
answer
helpful?
Yes
No
Wednesday, January 25th, 2012 AT 4:17 AM
  • Tiny
  • Wrenchtech
  • Expert
  • 19,586 posts

I don't see the actual leak but your picture is of a plastic elbow attached to the belt tensioner that carries coolant. This elbow rots and leaks all the time. When you remove it you will have to dig out the broken pieces from the engine and tensioner.

Was this
answer
helpful?
Yes
No
Wednesday, January 25th, 2012 AT 10:45 AM
  • Tiny
  • ray9191
  • Member

Ok because I though it was my intake manifold because it had a crack but I replaced it and the gasket for it but I only see it shoot out when I rev my car could there be some coolant still down there and its just blowing out the coolant that was still in there

Was this
answer
helpful?
Yes
No
Wednesday, January 25th, 2012 AT 7:33 PM
  • Tiny
  • Wrenchtech
  • Expert
  • 19,586 posts

Pressure test the cooling system as you should have done first.

Was this
answer
helpful?
Yes
No
Thursday, January 26th, 2012 AT 3:33 AM
  • Tiny
  • ray9191
  • Member

How do I pressure test my cooling system

Was this
answer
helpful?
Yes
No
Friday, January 27th, 2012 AT 5:07 AM
  • Tiny
  • rasmataz
  • Member

Its easy just get a cooling system pressure tester and read the operating instruction-it will walk you thru-

Was this
answer
helpful?
Yes
No
Friday, January 27th, 2012 AT 6:10 AM

Please login or register to post a reply.

Similar Questions