Author Topic: Is it time for a new head gasket?  (Read 945 times)

Nikolaj

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Is it time for a new head gasket?
« on: September 02, 2022, 07:57:58 »
Hi all,

I am in doubt if my head gasket is blown. The car has been parked for around 2 years without me driving it.
The engine is running fairly well – I guess there is always something to improve and finetune – but I have noticed that it consumes cooling water and I can smell gasoline when I open the water reservoir (no bubbles) and as you can see from the picture there is leaking cooling water from between head and engine block. I haven’t noticed any other symptoms – compression test is fine, no oil in the water or vice versa.
Is it possible to re-torque the head ? or is it a new head gasket?

Thanks for any good advice.

Nikolaj

WRe

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Re: Is it time for a new head gasket?
« Reply #1 on: September 02, 2022, 08:20:18 »
Hi,
I would try to re-torque the cylinder head first.
Bring the engine up to operating temperature. Slightly loose cylinder head bolts, one at a time, in the sequence shown in the tightening diagram (https://www.sl113.org/wiki/Engine/TorqueHead), starting with 1, and tighten to the specified torque (110 Nm/11 kg/80 ft.lbs).
Good luck!
...WRe


Charles 230SL

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Re: Is it time for a new head gasket?
« Reply #2 on: September 02, 2022, 11:09:05 »
..I would try to re-torque the cylinder head first..
I agree with WRe, re-torque the head first. Have you seen any coolant leaking from the reservoir cap (indicating over-pressurization)?

merrill

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Re: Is it time for a new head gasket?
« Reply #3 on: September 02, 2022, 20:03:55 »
hi
i had similar leaks on my 66.

i tried re torqueing the head,  with the guidance from Joe.
I went as far as to loosen the spark plugs in addition to removing the radiator cap.
but the re torqueing did not work.

purchased a new head gasket from metric along with a can of spray copper sealant, installed the new gasket and have no issues.
Matt
Austin Tx
66 230 sl - "white"
78 300 D - Blue
98 C230

ja17

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Re: Is it time for a new head gasket?
« Reply #4 on: September 04, 2022, 03:58:05 »
Yes try re-torqueing the head first. It may not always work as merril has indicated, but worth a try.  Don't forget to loosen the radiator cap first to relieve the pressure in the cooling system.
Joe Alexander
Blacklick, Ohio
1969 Dark Olive 280SL
2002 ML55 AMG (tow vehicle)
2002 SLK32 AMG (350 hp)
1982 300TD Wagon turbo 4spd.
1963 404 Mercedes Unimog (Swedish Army)
1989 flu419 Mercedes Unimog (US Army)
1998 E430
1974 450SLC Rally
1965 220SE Finback