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Author Topic: MV6 - who says V6 Head Gaskets never fail?!  (Read 9189 times)

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Andy B

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Re: MV6 - who says V6 Head Gaskets never fail?!
« Reply #15 on: 31 May 2009, 19:07:52 »
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Shaddap you - everything is numbered  ;D  :y

 I was only trying to be helpfull .....  ;)  ;)  ;D  ;D :y
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JamesV6CDX

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Re: MV6 - who says V6 Head Gaskets never fail?!
« Reply #16 on: 31 May 2009, 19:10:18 »
I am amazed the manifolds weren't blowing actually - this car had cheap nasty pattern, composite exhaust manifold gaskets.

Baz has looked after the car well I have no doubt, but someone in previous ownership has certainly cut a few corners  ;D
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TheBoy

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Re: MV6 - who says V6 Head Gaskets never fail?!
« Reply #17 on: 31 May 2009, 19:51:05 »
Know what garage has done that work? One to avoid!
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Kevin Wood

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Re: MV6 - who says V6 Head Gaskets never fail?!
« Reply #18 on: 31 May 2009, 20:13:49 »
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With that much silicone I would drop the sump and check the oil pickup is clear. :o



Yep - I sure will, before it's run again!

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Bear in mind it can kill lambda sensors too.

Kevin

If it gets into the combustion chambers?


It gives off fumes while curing, which may end up in the crank case - or will, in the case of some cowboy plastering it with that much sealant. Then, when engine is run, it is drawn through the breathers, burnt and contaminates the lambdas on the way out.

Of course, you can get sensor safe RTV sealant - like the VX black stuff, but that stuff looks like it came from the back of a bathroom fitter's van.

The guy clearly didn't have much faith in the rubber seals. ;D

Kevin
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BazMV6

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Re: MV6 - who says V6 Head Gaskets never fail?!
« Reply #19 on: 31 May 2009, 20:30:36 »
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Baz has looked after the car well I have no doubt, but someone in previous ownership has certainly cut a few corners  ;D
Thanks for the vote of confidence.  :y  But the car had already done 111k when I picked her up - so no telling how she was looked after in a previous life...  :-/

Very interesting to see the photos.  I'm going to be very jealous when she's all back together and purring nicely...  8-)
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JamesV6CDX

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Re: MV6 - who says V6 Head Gaskets never fail?!
« Reply #20 on: 31 May 2009, 20:51:16 »
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The guy clearly didn't have much faith in the rubber seals. ;D

Kevin

Fair play though - that pattern gasket lasted 40k miles  ;D
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JamesV6CDX

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Re: MV6 - who says V6 Head Gaskets never fail?!
« Reply #21 on: 01 June 2009, 20:42:05 »
Update:

Both heads stripped, all valves and stem seals removed, and heads cleaned.

I'm now reassembling the 2-4-6 head - 7 stem seals and valves refitted, so far....

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JamesV6CDX

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Re: MV6 - who says V6 Head Gaskets never fail?!
« Reply #22 on: 01 June 2009, 20:46:22 »
Note the corrosion on the left hand of the picture..... note this is perfectly smooth etc, but I can't get it shiny....
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markey mark

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Re: MV6 - who says V6 Head Gaskets never fail?!
« Reply #23 on: 01 June 2009, 21:47:02 »
i would be tempted to have them skimmed or faced up at least james  :(
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TheBoy

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Re: MV6 - who says V6 Head Gaskets never fail?!
« Reply #24 on: 01 June 2009, 21:52:07 »
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i would be tempted to have them skimmed or faced up at least james  :(
skimming is issue due to coolant bridge etc
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markey mark

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Re: MV6 - who says V6 Head Gaskets never fail?!
« Reply #25 on: 01 June 2009, 21:54:07 »
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i would be tempted to have them skimmed or faced up at least james  :(
skimming is issue due to coolant bridge etc

no mate it is not have skimmed heads on mine no probs at all only needs a small amount taking off !
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albitz

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Re: MV6 - who says V6 Head Gaskets never fail?!
« Reply #26 on: 01 June 2009, 21:59:12 »
Looks like its coming along nicely, should be for sale by the end of June? ;)  ::)
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JamesV6CDX

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Re: MV6 - who says V6 Head Gaskets never fail?!
« Reply #27 on: 01 June 2009, 23:59:20 »
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Looks like its coming along nicely, should be for sale by the end of June? ;)  ::)

No chance - she's mine ;D

Markey - out of interest, why would you skim? No distortion or serious pitting etc - I guess after 150k miles, you won't be able to see your face in it?  :-/
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hotel21

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Re: MV6 - who says V6 Head Gaskets never fail?!
« Reply #28 on: 02 June 2009, 00:08:18 »
Was the area of failure the same as the area of dark grey?  If yes, then a very very light skim may suffice but remember the coolant bridge if the engine shop gets too keen. The head gasket is also designed to take up very minor imperfections by its very design...

Personally, if MDTM says dont skim then I wouldn't unless really neccessary....
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JamesV6CDX

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Re: MV6 - who says V6 Head Gaskets never fail?!
« Reply #29 on: 02 June 2009, 00:11:20 »
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Was the area of failure the same as the area of dark grey?  If yes, then a very very light skim may suffice but remember the coolant bridge if the engine shop gets too keen. The head gasket is also designed to take up very minor imperfections by its very design...

Personally, if MDTM says dont skim then I wouldn't unless really neccessary....

Hiya B

The failure area was indeed at the rear passenger corner of HG - which is encompassed by the darker coloured area.

It feels totally smooth and I can't detect any distortion. I feel the leak was due to lack of antifreeze perishing the composite gasket over time.... and personally not sure a skim is needed

That said - I welcome all opinions on the subject :y
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