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 Post subject: 2000 GMC 2500
PostPosted: Sun Feb 08, 2015 6:38 pm 
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Location: Houston
So my neighbor a couple doors down is in his 70's....bought this 2000 GMC 2500 brand new.

He asked me to come over the other day to diagnose why it would be using a lot of coolant.

The oil isn't milky at all...and it's running/idling/accelerating fine. So I checked compression on all the cylinders and #2 builds up to 120, but as soon as you quit cranking, it all bleeds off.

I'm thinking a head gasket. He said he did get it a little bit hot a few weeks ago and had the thermostat changed on it.

So I showed him the compression leaking down and gave him my best guess and called it a night.

He called me over this afternoon and showed me the brand-new beautiful GMC truck in his driveway (that he just got back from buying at the dealership) and tossed me the keys to the 2000 model and asked me if I wanted it. I've fixed a lot of his stuff (cars, lawnmowers, etc) over the years and he offered to give it to me, but I insisted on giving him a few hundred dollars for it. Other than the engine issue, it's clean, has 113K miles on it, AC blows cold, has new tires, fresh inspection, etc. It's a great truck.

So what are yall's diagnostic opinions based on what I've said so far? I don't really want to pull the head on the thing. I mean, I can do it...I just DON'T WANT to. It's got that Vortec fuel injection and dang it, I just really don't want to spend a whole weekend buried in the thing. But maybe I'm imagining it worse that it'll actually be.


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Don
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 Post subject: Re: 2000 GMC 2500
PostPosted: Mon Feb 09, 2015 8:33 am 
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Joined: Sun Jan 03, 2010 9:06 pm
Posts: 952
Location: Jamestown, NY
Nice guys do get rewarded in life and it was very nice of him to think of you. What does the exaust smell like? Do you smell that sicky-sweet antifreeze smell in the air?
My guess is that you are on the money with the blown head gasket, but wait for a few more to chime in that are more knowledgable. Got any local shade-tree mechanics that could give you an analysis and perhaps do the job for you? You've got a lot on your plate at this point and changing a modern head gasket is not nearly as fun as working on a 60 year old engine. I don't know what the going rate is, but I've always found that there are a lot of younger motor-heads out there that would love to earn $300. Just a thought.

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