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I had a head redecked recently and I noticed one of the pre cups is loose and can be removed with my fingers. I'm guessing they put them back in the head in no particular order and one ended up in a different hole. I'm not thinking this will be a problem as its still sitting about .002" above...

its below zero now. Will I have problems getting my new head gaskets to seal? I'll be putting the engine back together this weekend or next and I am concerned with the dropping temps (negative teens next week) that I might not be able to get my felpro head gaskets to seal up well. The heads have...

The last time I changed my heads I opened up my head gasket coolant passages before putting in the heads. The theory was that I would get better coolant flow and prevent a cracked head. I ended up with another cracked head anyway about 15000 miles later. I didn't open them up much but I don't...

How prone to cracking are the main bearing webs when removing the main cap bolts? I have been informed by two machine shops which wont touch my 6.2 for a rebuild that this is a really common problem with the 6.2 I want to check with you guys on this before I pull the bolts to put in new bearings.

It turns out that the head on the same bank of my 6.2 which was emitting a cloud of oil and fuel smelling smoke on start up was cracked in each of the middle two intake valves. The leak was so small that I didn't notice coolant burning at the rate I experienced the last time I had a cracked...

I am planning on reringing my 6.2 pistons while I have the heads off. This is because of three reasons. 1 I am trying to eliminate a smoke on start up issue out of the left bank and two no shop in town will touch my block because they are afraid of cracking it and three because I don't have the...

For the last couple weeks I have been noticing that my M1009 emits a fairly large cloud of white smoke from the right bank on start up. I trouble shot the glow plugs and everything is ok. I know my valve train is worn as I blow more blue smoke in general than I did a few years ago. I think...

My original power steering and oil cooler lines leak in the winter up here in Alaska and I need to find some new replacements. If someone can help me locate some, preferably steel braided that would be great.

So have a M1009 that I have used off and on over the last 5 years as a daily driver. I recently moved up to Fairbanks, AK from central MT and I have noticed some new leaks I have never had before. The clamp fittings on the uppermost power steering line are leaking. I am guessing that line is the...

I have an issue that has been perplexing me for months now. I have a leak on the inside side of the left side coolant cross over pipe on my engine that no matter how diligently I try to seal won't stop leaking. I originally tried to seal the leak about 24 months ago with new gaskets and red...

I'll be moving to Alaska in september and and wondering about winterizing my M1009. Right now I'm in central MT and am no stranger to operating this bad boy in -20 or lower temps. I need to prep it for -60 though. I currently have an oil pan heater but want to add a coolant heater (either block...

I am wanting to do the Stanadyne FM100 fuel filter upgrade on my 1009 but I want to make sure I get all the parts I need the first time I order. I want a set up with the heater and the removable clear water trap. I will also need the brass fittings. If someone can tell me who supplys all these...

My oil pressure light on my m1009 is now flickering. I went through some deep puddles today and the whole truck got wet and the light came on and then started to flicker on an off. It’s the first time since I've owned the truck that this has happened. I have 20k miles over two years and plenty...

What does the timing advance solenoid actually do? It looks like the plunger actually connects or contacts anything in the lower part of the fuel pump. If I'm right it looks like when the solenoid is energized the plunger pushes up and either opens up the check valve on the fuel return connector...

Sooo. I have the newer engine in my truck now. I have gotten it to fire up (after I had to swap the lift pump out) and it will run for 3-5 minutes and then die on me and I cannot get it restarted until I re purge the system. I'll re purge the fuel filter first even though when I open up the...

So my engine swap is going well. I took the oil pan off the 6.2 that I got from Boyce equipment. (They said that the engine came out of a truck with 18k original miles, which I believe due to the total absence of oily residue on the front of the engine like my blown one has after 110k miles...

So I decided to just buy a Boyce equippment 6.2 to replace the one I have with a cracked block. I am wondering what might have caused the one that is in my truck now to develope a cracked block. Only thing I can think of was starting the truck all winter at work when it was below freezing. It...

So I know that a lot of this is covered in other threads and I am fairly familiar with the CUCV configuration of the 6.2l Detroit but not the HMMWV one that I will want to put in my M1009 CUCV to replace my current blown engine. If you have been following my other threads you have read that I...

I am going to buy an engine from white owl surplus and I am wanting to get input on what others think of their 6.2's I know they are pull outs with low mileage but is there anything I need to be concerned with. I.e. the contractor who was doing the engine swaps on these hummers removing blown or...

I have coolant leaking into the crank case some how on my m1009. Its not the head gasket like I thought since I replaced them and had the heads rebuilt. This is really frustrating because it was a lot of work and money. Basically here is what was happening before and again now. So at first...