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I have a question for all you good engine rebuilders out there(especially Charles). Although it's not an M-series, I'm in the process of rebuilding the Wisconsin engine on my air compressor, and although I've done a few engines before I've been thinking alot about this one. What's the best recommendation for gasket sealer to be applied to the gaskets during assembly. I always use copper-coat on the head gaskets and manifold gaskets, but what about all the other ones, ie. valve cover oil pump, etc. I have used the age old gasket shellac with good results, but it's messy and makes it a pup if the engine has to dissassembled again. Any suggestions?

Thanks again.

Paul

flobble wrote:I have a question for all you good engine rebuilders out there(especially Charles). Although it's not an M-series, I'm in the process of rebuilding the Wisconsin engine on my air compressor, and although I've done a few engines before I've been thinking alot about this one. What's the best recommendation for gasket sealer to be applied to the gaskets during assembly. I always use copper-coat on the head gaskets and manifold gaskets, but what about all the other ones, ie. valve cover oil pump, etc. I have used the age old gasket shellac with good results, but it's messy and makes it a pup if the engine has to dissassembled again. Any suggestions?

Thanks again.

Paul

NAPA Permatex anearobic gasket maker. It's in a blue tube, is red in color, & looks like grease when applied. It is the best we have ever used. Does not cure until out of the presence of air. We also use aerosol Copper-Coat in the high heat areas as well, a great product. Permatex high-temp thread sealer used on bolt threads where through holes are encountered will stop many slow oil seeps too. These are 3 products we are never without.

Thanks Charles, I knew I could count on you for the expert answer.

MSeriesRebuild wrote: Does not cure until out of the presence of air.

I have always wondered what keeps it from curing in the tube???

HOLZINGER wrote:

MSeriesRebuild wrote: Does not cure until out of the presence of air.

I have always wondered what keeps it from curing in the tube???

There is air in the tube also. It's a different type of tube than what is used for silicone, etc.

To add to what Charles stated there is a large amount of oxygen content in the liquid tube mix. Thus it being "anaerobic", it will cure only when confined between two mating flanges because that oxygen is dissapated and no new air can get to it.

Thanks for the information. I have only ever used conventional sealant. Now I must stock up on some of this!

HOLZINGER wrote:Thanks for the information. I have only ever used conventional sealant. Now I must stock up on some of this!

It ain't cheap initially, at about $14 per tube at NAPA, but I promise you will not be disappointed in its performance. Well worth every cent. I'm satisfied it has made us money over the long haul.

HingsingM37 wrote:To add to what Charles stated there is a large amount of oxygen content in the liquid tube mix. Thus it being "anaerobic", it will cure only when confined between two mating flanges because that oxygen is dissapated and no new air can get to it.

David, do you offer this type of sealant through your day job?

Charles,
Yes. I will send you an email with the Loctite and Perma-tex sealers we carry.