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Home > General Chat > Aaand another head gasket failure... Water damage!

Asphalt

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Germini, black forrest

8th Jul, 2011 at 04:41:03pm

Don't know why, but there was only a very slight drop in top-end power notable...



What made me wonder were rusty and green spark plugs...



*surprised*

And, as thought but not hoped; disaster...



Late march, when I put the car back on the road, I noticed that over winter a bit of water had vanished in the rad. That was probably that. Cylinder 2, 3 & 4 have water damage, 2 & 3 are down to 7 & 8 bar compression, with a new gasket. So I suspect the rings have had it, as it also burns quite a bit of oil...

And this can't be a dodgy gasket - it's a NOS gasket from 1985! *hehe!*

Edited by Asphalt on 9th Jul, 2011.

[X] nail here for new monitor

BENROSS

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Resident Cylinder Head Modifier

Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem

8th Jul, 2011 at 05:23:50pm

Oh dear ........ *frown* those bores look very tierd ........... *Idea* time for a rebore new pistons etc..... there

usually 2&3 blown between is detonation cause................... but you want to be using a decent torque wrench most gaskets fail because most peeps use their grandads torquewrench........it was ok when he was a lad .....lol *hehe!*

sort the detonation and the torque figures

keep us posted *smiley*






Asphalt

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Germini, black forrest

9th Jul, 2011 at 12:57:13pm

Detonation could be a cause - I think that could be possible, as I indeed had - occasinally - problems with that. In low rev-high load situations. The engine made a 'pinging' noise (not unlike the noise when you would hit a manifold with a wire brush, a light, high 'pink'). Is this detonation?

Serves me right for not sorting that out in time, I guess... :(

I have another low-milage spare engine waiting for installation,as soon as I have the time to do that...

It's a n/a engine, btw. :) (1275, ~10:1 CR, MG cam, Inno large valve head, HIF6, ported manifold, LCB/RC40)

Torquing down the head; do you re-torque the gasket? Latest approach I heared was to torque it down as per manual, and tighten the nuts another 20° after one full heat cycle (adjusters out & all studs oiled). Without losening them first!

Cheers,
Jan

[X] nail here for new monitor

BENROSS

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Resident Cylinder Head Modifier

Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem

9th Jul, 2011 at 05:03:18pm

well in my book torque to 55ft pounds cold and leave it at that

RULE:- ... IF YOU HEAR A "PING" ...LIFT YOUR FOOT THE ENGINES LIFE IS THREATEND

keep us posted






NickG

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Australia oi oi oi!

10th Jul, 2011 at 08:22:31am

What about if it has been torqued down cold already? Just go back over it to check it's 55ft ?

pot_dan

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bradford, west yorks

10th Jul, 2011 at 10:51:50am

Jan, maybe consider getting a head modified to lower the cr and run the turbo on this N/A engine? I have done this for years with no problems and a Benross head *smiley*



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