Although this is not a MB question, with all of the aluminium heads running at high temps, what better forum to pose the question: What kind of sealant should I use when I change the head gasket on my '86 Alfa Spider? I have never done a head gasket before, but I really want to learn how to do this. (and I would much rather practice on the Alfa than the MB).

__________________
Eric
'88 300E
'00 Expedition
'86 Alfa Romeo Spider
'84 Harley Davidson FLH"X"
Special Edition
'70 FJ40 Land Cruiser (basket case)

I believe that in general, the head is torqued down onto the metal head gasket to such an extent that you don't need (or want) any sealant. All you need to do is make sure you have clean shiny (and flat) metal surfaces.

Not so easy to determine flatness, but if you have no reason to suspect warpage it shouldn't be a problem. If you had head gasket leakage it may be an issue - I think most people have a shop determine flatness in that case. Your block probably won't warp.

Ken300D

Most Alfa's use a WET sleeve engine so sealing technology can be different. You should always follow info that the OE GASKET manufacturer supplies.

"MOST" head gaskets on Benzes require NO extra sealant & can create problems if they are used!

Of course that doesn't apply to the new M112 & M113 engines as they are glued toghther with Loctite 5900.

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

Thanks for the responses! I appreciate the assistance.

__________________
Eric
'88 300E
'00 Expedition
'86 Alfa Romeo Spider
'84 Harley Davidson FLH"X"
Special Edition
'70 FJ40 Land Cruiser (basket case)