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All those filters with the plastic plug have a groove on the side to allow the fluids to drain without removing the plug entirely. Under pressure it squirts to the side. I bought a brass drain fitting to replace it. Turn the handle, drain the filter and the fluids go straight down into an old...

I did just exactly that. No regrets.

How do you tell if they have been decked before? Mine has 1991 Tooele rebuild stickers on it.

OK, JT, get busy. A new product!:wink:

Where do you get the copper freeze plugs? What size are they?

I forgot to add: The mechanics doing the head work are race car builders. Locally, they are known for the quality of their work and the speed of the engines they build. Recently, they have built a number of diesel engines for tractor pulls around the country. But, they are really old friends...

I may just buy new heads and put them on. The engine has been a strong performer even while handicapped. It was up to 70 here today and just right for working on the truck. That is why I was in the court house.:-(

I am wondering what you guys are paying to have the head decked (flattened) and for valve job repairs on your multi-fuel. I am starting to find out who does this locally and needed some idea of how much I should be paying for it. Thanks.

There were two air packs for the G749. An early M135 version and another for later M135 and all other models.

I have a couple of projects with him. One is the M135 which we are putting to running again. This will take about ten hours. I expect about $500 for the labor. I also am paying for the valve work and flattening the heads. I expect that to be several hundred also. But, I may just buy a...

I am wondering what others who have replaced the head gaskets experience after the change? Normal running, shortened engine life or more problems?

The engine runs strong. There was some, not a large amount of AF in the oil. Perhaps half a pint total. When I drained the oil I felt better about driving it. But not too far! I do not drive it much, parades and such for the most part, and I think we may have gotten it when it finally...

Yes, I believe so. There are two o-rings in it. Mine were discolored and there was some AF in the oil. We changed it out and I drove it for a few months. Then in early November, when it cooled off around here I drove it and noticed what appeared to be some small amount of steam coming from...

I start changing out the head gaskets today. I thought I had the leak into the oil fixed with the oil cooler repairs. But, yesterday I noticed the radiator cap, new, seeping AF from over pressure when the engine was still cool. I figure the head gaskets are done. So, I take it to the...

Beware! I had one like that one time. It was a secret death trap. You are not save around it. I can offer you $500 cash right now to take it away so you will not be endangered. Honest.

Which TM has the head gasket replacement instructions?

I have the milkshake. But, I also had the cooler leak probably long before I got the truck. I got the cooler leak fixed. Now, to see if that makes a difference. If not, I will start pulling the engine down. I have a full gasket kit, so that is in place if needed.

I drove my M35 for about three months knowing I had AF in the oil. I fixed the problem, I think, and finally changed the oil just now. It had a small amount of AF in it. But, the radiator had pressure. I believe the AF was residue. I will know when I change the oil again in June.

Leaky wheel cylinder it appears.

This was the thread that convinced me to buy a coolant filter. I installed mine exactly as Bjorn did.