Should I be worried about my 6.5 ?
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Newbie
Joined: Apr 2014
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Should I be worried about my 6.5 ?
Ahoy every one! Just joined the club today and I need some advise.
I just purchased a 2002 Chevy c3500hd w/utility body. It was government owned since new.
She only has 39k miles of use. It runs fantastic . Yesterday I did an oil change and noticed it only holds about half the amount of oil than my duramax 6.6.
That got me to do a little online research on this engine because I thought they were roughly the same. Turns out there is a ton of negative info out there about the 6.5 and I'm a little freaked out. I purchased this truck for my business and plan to fill it with equipment. Being that its a true hd iwith a utility body she's gonna be heavy. I need this truck to last me years and could use some advise on how to make sure my 6.5 lasts. Also the truck only has 39k and it looks and drives like new. Is there a way to check the hours? Just wondering since it was gov owned. Thanks everyone!
I just purchased a 2002 Chevy c3500hd w/utility body. It was government owned since new.
She only has 39k miles of use. It runs fantastic . Yesterday I did an oil change and noticed it only holds about half the amount of oil than my duramax 6.6.
That got me to do a little online research on this engine because I thought they were roughly the same. Turns out there is a ton of negative info out there about the 6.5 and I'm a little freaked out. I purchased this truck for my business and plan to fill it with equipment. Being that its a true hd iwith a utility body she's gonna be heavy. I need this truck to last me years and could use some advise on how to make sure my 6.5 lasts. Also the truck only has 39k and it looks and drives like new. Is there a way to check the hours? Just wondering since it was gov owned. Thanks everyone!
Diesel Fan
Joined: Apr 2014
Posts: 63
Likes: 1
From: Oklahoma
It's an 02 with a 6.5??? Are you absolutely sure it's a 6.5 and not the dmax?!
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And if you want it to be reliable just relocate the pmd, replace heads and head gaskets if you have the bank, and service it meticulously. These are good engines if they're taken care of or else the military wouldn't still be using them in the humvees today.
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And if you want it to be reliable just relocate the pmd, replace heads and head gaskets if you have the bank, and service it meticulously. These are good engines if they're taken care of or else the military wouldn't still be using them in the humvees today.
Last edited by TheBear; Apr 22, 2014 at 11:48 PM. Reason: Automerged Doublepost
Thread Starter
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Newbie
Joined: Apr 2014
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It's an 02 with a 6.5??? Are you absolutely sure it's a 6.5 and not the dmax?!
---AutoMerged DoublePost---
And if you want it to be reliable just relocate the pmd, replace heads and head gaskets if you have the bank, and service it meticulously. These are good engines if they're taken care of or else the military wouldn't still be using them in the humvees today.
---AutoMerged DoublePost---
And if you want it to be reliable just relocate the pmd, replace heads and head gaskets if you have the bank, and service it meticulously. These are good engines if they're taken care of or else the military wouldn't still be using them in the humvees today.
Yes 6.5 , the 3500hd came with a 6.5 super heavy truck has older body style with the extra panel between grill and bumper. Hope you didn't mean replace the head. If so replace with what?
Diesel Enthusiast
Joined: Jan 2011
Posts: 337
Likes: 17
From: South Dakota
have to agree drive it like it real easy and try not to get too much boost and you will be ok
I worked a a place in 98 and they had a service truck I could drive it for months and have no problem but let some hotrodder have it for a day and i would be putting an engine in it
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Newbie
Joined: Apr 2014
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Great , thanks for the responses .My fast and furious days are long gone . I laugh every morning watching everyone hauling a** while I'm driving like grandpa. Would like to do a detailed inspection and tune up just to be sure. I was expecting to get a bit more fuel economy , about 13 city right now. Any fuel treatments or any recommendations on what to check?
Diesel Enthusiast
Joined: Jan 2011
Posts: 337
Likes: 17
From: South Dakota
the 6.5 is just one more engine that gm made that should not have been made I have changed out more gm engines than I would want to and I don't have much good to say about them
if you want a real truck it has 35k on it start parts saving and put in a 5.9 12v cunnins then you will have something that will last a lifetime
if you want a real truck it has 35k on it start parts saving and put in a 5.9 12v cunnins then you will have something that will last a lifetime
Diesel Bomber
Joined: Oct 2010
Posts: 2,448
Likes: 311
From: TEXAS
the 6.5 is just one more engine that gm made that should not have been made I have changed out more gm engines than I would want to and I don't have much good to say about them
if you want a real truck it has 35k on it start parts saving and put in a 5.9 12v cunnins then you will have something that will last a lifetime
if you want a real truck it has 35k on it start parts saving and put in a 5.9 12v cunnins then you will have something that will last a lifetime
Diesel Bomber
Joined: Oct 2010
Posts: 2,448
Likes: 311
From: TEXAS
As with any engine, the best place to start would be to free up the exhaust and make it breathe easier. You will gain efficiency, a bit of HP and TQ, and likely a little boost in mileage. Dont expect alot though.
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I've heard a lot about the cummins swap. Haven't heard much about cost though . I think if heard a free breathing cummins under the hood of my truck I'd get a stiffy. Any idea how much custom fab is involved?
