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[3Hummer]

What happened to the engine that it was replaced at 9,000 miles under warranty? And has it even been driven in eight years, that cant be good for the car either they need some exercise every now and then

[HemiDon]

I'm not positive, but I think it was because of the bad #8 cylinder problem on some blocks. It was done at a Hummer dealer shortly before the last owner purchased it. He has a copy of the work order, so when I get to see it I'll know for sure. I sure hope those replacement blocks were better than the originals. Does anybody have an answer to that ?

[frenzy1]

Great rides bro !! %Welcome to the site !

[ssgharkness020147]

Yes. They were better. As to what extent depends on the year. Some say that the No 8. was a problem til 2001, for the record most people saying that are trying to sell a truck. My truck has a 99/00 block in it, and over 70K on it, with no problems (JINX). IMO, You'll be fine, just dont go nut with power add ons. The 6.5 in stock form was not ment to be making 350 Hp, with 600 lb/tq. The main issue you could face with a newer block is headgaskets, which do tend to fail. I had mine fixed (both) for under 2K when one went.

Originally Posted by HemiDon

I'm not positive, but I think it was because of the bad #8 cylinder problem on some blocks. It was done at a Hummer dealer shortly before the last owner purchased it. He has a copy of the work order, so when I get to see it I'll know for sure. I sure hope those replacement blocks were better than the originals. Does anybody have an answer to that ?

[HemiDon]

Thanks for the positive news. I'm not planning to install a lot of engine mods, but I do plan to replace the stock exhaust system with a stainless steel system that removes the catalytic converter and maybe the muffler.

I also plan to install a rear cylinder head cooling kit. Do you guys have any of these installed ?

[JustinOK]

I installed the rear head cooling kit last month. I bought the kit from Chuck. I made a thread on the HML with some pics of my install job. Actually, most pics are from the doghouse teardown, which was a pain in the arse.

My 98 TD had 58K when I bought it, original engine.

[SELWA]

Where in Canada are you?? I'm in Milton, Ontario. I met up with 10 H1 owners yesterday for a meet.

Thanks,
Joe

[HemiDon]

I'm located in Saskatoon, Sask. There are a couple other H1s in town, but they are not too common in this part of Canada. Alberta has more because of the oil and gas industry.