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Author Topic: head gasket  (Read 1223 times)

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gary

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head gasket
« on: 03 January 2008, 17:37:06 »
i have an omega cd 2.2. i have just had it converted to lpg and the head gasket has gone  would the lpg have anything to do with this .thanks gary
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JamesV6CDX

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Re: head gasket
« Reply #1 on: 03 January 2008, 17:39:29 »
Quote
i have an omega cd 2.2. i have just had it converted to lpg and the head gasket has gone  would the lpg have anything to do with this .thanks gary

Welcome mate.

1) What symptoms do you have that lead you to believe HG has failed?

2) LPG wouldn't make much difference. It burns a bit hotter, so isn't a good lubricant. It can wear valves over a VERY long time, but I doubt it would affect the HG.


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cem_devecioglu

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Re: head gasket
« Reply #2 on: 03 January 2008, 17:46:11 »
Hi
try compression test

ps: also your car must loose coolant..
« Last Edit: 03 January 2008, 17:47:36 by cem_devecioglu »
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Markjay

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Re: head gasket
« Reply #3 on: 03 January 2008, 19:53:34 »
Quote
Hi
try compression test

ps: also your car must loose coolant..

...not if the gasket is broken between two cylinders...
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Marks DTM Calib

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Re: head gasket
« Reply #4 on: 03 January 2008, 20:20:20 »
Quote
Quote
Hi
try compression test

ps: also your car must loose coolant..

...not if the gasket is broken between two cylinders...


Which VERY rarely happens on modern gaskets with metal fire rings.
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Andy B

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Re: head gasket
« Reply #5 on: 03 January 2008, 20:32:22 »
Quote
......
Which VERY rarely happens on modern gaskets with metal fire rings.
I suppose it depends how long it's been on the car. No6 cylinder fire ring rotted though, at the back though, on my Senator at around 150k & c10 years.
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Marks DTM Calib

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Re: head gasket
« Reply #6 on: 03 January 2008, 20:53:07 »
Quote
Quote
......
Which VERY rarely happens on modern gaskets with metal fire rings.
I suppose it depends how long it's been on the car. No6 cylinder fire ring rotted though, at the back though, on my Senator at around 150k & c10 years.


Thats unlikely to be cylinder to cylinder....they often fail when the coolant rots the supprting composite material away and the fire ring no longer has any support resulting in the fire ring pushing out towards the coolant ways.
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gary

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Re: head gasket
« Reply #7 on: 03 January 2008, 21:01:54 »
i have taken the car back to wear i had it converted to LPG, they have informed me that the head-gasket had blown (as it had white smoke coming out of the exhaust).  According to them, they have said that the LPG conversion has not caused this.  Has anyone else had the same problems?
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Andy B

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Re: head gasket
« Reply #8 on: 03 January 2008, 21:17:35 »
Quote
Quote
Quote
......
Which VERY rarely happens on modern gaskets with metal fire rings.
I suppose it depends how long it's been on the car. No6 cylinder fire ring rotted though, at the back though, on my Senator at around 150k & c10 years.


Thats unlikely to be cylinder to cylinder....they often fail when the coolant rots the supprting composite material away and the fire ring no longer has any support resulting in the fire ring pushing out towards the coolant ways.

It's not often you're wrong Mark, but, as usual you're right again! :y
« Last Edit: 03 January 2008, 21:18:34 by Andy_B »
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Elite Pete

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Re: head gasket
« Reply #9 on: 03 January 2008, 21:18:48 »
Quote
i have taken the car back to wear i had it converted to LPG, they have informed me that the head-gasket had blown (as it had white smoke coming out of the exhaust).  According to them, they have said that the LPG conversion has not caused this.  Has anyone else had the same problems?
Are you sure its not just condensation? Is the car using any water?
« Last Edit: 03 January 2008, 21:21:26 by Elite_Pete »
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Markjay

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Re: head gasket
« Reply #10 on: 03 January 2008, 21:32:56 »
Quote
Quote
Quote
Hi
try compression test

ps: also your car must loose coolant..

...not if the gasket is broken between two cylinders...


Which VERY rarely happens on modern gaskets with metal fire rings.

Yes but it can happen  >:(


lol  ;D ;D
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Taxi_Driver

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Re: head gasket
« Reply #11 on: 04 January 2008, 03:24:12 »
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i have taken the car back to wear i had it converted to LPG, they have informed me that the head-gasket had blown (as it had white smoke coming out of the exhaust).  According to them, they have said that the LPG conversion has not caused this.  Has anyone else had the same problems?

Not a good diagnosis if thats all they went on......this time of year any lpg car will chuck steam outa the exhaust esp when the engine hasnt fully warmed up. In this weather steam comes outa my exhaust on idle even with a hot engine.

What makes you think the head gasket has gone?
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Kevin Wood

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Re: head gasket
« Reply #12 on: 04 January 2008, 09:43:32 »
Quote
i have taken the car back to wear i had it converted to LPG, they have informed me that the head-gasket had blown (as it had white smoke coming out of the exhaust).  According to them, they have said that the LPG conversion has not caused this.  Has anyone else had the same problems?

As TD says, not a conclusive diagnosis for a start. Does the car misfire on both fuels? What other symptoms are present? Water loss? Poor compression? Fumes in expansion tank? They should have checked these...

I think it would be unlikely for them to admit to the possibility that the LPG conversion caused it because they'd know what's coming next.

However, they will have had to re-route parts of the cooling system to heat the evaporator. It's a possibility that they could have caused uneven coolant flow around the head or insufficient bypass flow during warmup. It's possible they didn't bleed the system properly when it was put back together. In addition, if it's running seriously lean on gas this might have contributed.

Problem is, proving any of the above is going to be a challenge. Head gasket failures are not uncommon on the 4 cylinder engines so it may well just be an unfortunate coincidence that it chose now to fail. :-/

.. assuming it has failed..

Kevin
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cem_devecioglu

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Re: head gasket
« Reply #13 on: 04 January 2008, 11:44:29 »
By the way gas combustion results with water steam also.. ;)
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