I know they are not powerhouses but they seem like a better fit than the 6BT. It would be equal to a 6.2 GM that I was also considering.
Any input?
I know they are not powerhouses but they seem like a better fit than the 6BT. It would be equal to a 6.2 GM that I was also considering.
Any input?
I was talking to my friend Phil about the GM diesels. He has seen a lot of them with head problems. Brad the machinist says it is not if but when. They both hate them. They suggested if going diesel to use a Cummins or an old ford 6.9 or 7.3. Much better for longevity with less hassles and no known head problems.
I am definitely not in love with the idea of a 6.2. Don't care for the V8 config and the know issues (even though some people play it down). I was only really interested cause of the ease of swap.
The 6AT uses a chevy bellhousing and is smaller than the 6BT. The 4BT is not an option (for me) cause I just can see putting in a 4cyl - even if it does make more power.
I hear parts are hard to come by for the 6AT but can't be harder than the stock motor.
There is an easy and cheap fix for the 6.2/6.5 head cracking problem, and they can be good engines if treated like a typical SB Chevy, they cannot run with the IH/Ford diesels or Cummins.
The heads crack between the valves, through a coolant passage. Ream out the coolant passage with a reamer, press in a bronze valve guide liner secured with green locktite, and presto, even if the head cracks, it can't leak coolant or cylinder pressure. I did this on a 1990 Suburban I had, worked great. I got the stuff I needed from the Diesel Depot, I think. It was in Florida or Georgia. Great guys to work with.
And is it worth it? Is the 6.2 worth the effort or am I better off starting with a cummins? The install will be harder with the cummins but the end product may be way better.
A friend of mine had a 6.2 problem, but it was the head gasket that failed.
Running along about 55-60 and poof! Making TONS of white smoke (steam?).
The gasket let go from corrosion. He has a 4x2 duallie Cummins, now. And gets 22+ mpg.
A 4BT will easily match the HP output of a stock 6.2 (130HP?) and even a CPL 858 will surpass the torque of a 6.2 (240lb-ft according to wikipedia). The 4BT and the 6.2/6.5 family are in completely different families and have very different life expectancies. How many 6.2's have you seen driving industrial equipment?
Ok - so back to my original question. What about the 6AT? Seems a perfect match for the M.
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