First of all, I would like to say thanks to Deisel Bombers for letting me be part of its community. I have done alot of reading, research but without hopefully sounding redundant, I have a question(s) i would like to ask.
I have a 93 K2500 6.5 Turbo Diesel (V.I.N. 8th being F) in which I am the middle of a total rebuild. The motor is low on compression and has alot of blow by, so I have purchased a 97 6.5 Naturally Aspirated out of a snub nose tool van; which I have completely torn down and planned to rebuild and replant into the 93.
I already had a very reputable machine shop look at the block and spec the crank out, which the crank is in very good condition. We decided to go 20 over, but right now that's where I stand.
I don't plan on building a motor to impress anyone except myself, but I would also like to rebuild it stronger, a lil more horsepower, but first, more longevity. I also plan on putting the Turbo back on the 97 motor.
Also, it will defianetly be driven daily, not a work truck, but occasionally used for towing.
So my question is, since I am at the point where my motor is completely torn down, what are your suggestions. Kinda a blank canvas to start. I already plan on a larger volume oil pump, marine injectors, but things like pistons. Where, what brand? ReMain kit, obviuosly.
Like head studs, what really is the difference between grades of OEM or ARP? I know my fuel pump was just rebuilt.
I am really open to all suggestions, but my final goal is to have a strong running 6.5, not a completely modded motor. Thanx

 

for one thig 97 was never N/A

sec marine injectors not going to do thing for you and that because the injector pump ony put out so fuel

Go with ARP bolts

now for ging 20 over don't it can happen there not lot you can do with the block it the add on that adds power to these motors

 

97 was never naturally aspirated? the 6.5 came out of a 97 snub nose Mac tool truck. what year would you assume that would put the 6.5 at?
as for the marine injectors, you're saying just go with OEM (Bosch)?
And Crazy, as for your last statement, going 20 over, I not being rude but I did not understand what you were trying to say. I have to go 20 over to clean it up.
Thanx

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Crazy, I just talk to the deisel mechanic who always serviced this motor and he told me that he had trouble running the V.I.N. before on this truck, but he told me it was a 96 motor left N/A because if its application. (?)

 

from what i have read the 97 was the worst of the blocks to own and something like 70% have had catastrophic engine failure due to cracking. if it needs 20 thou taken out to clean it up i would go with a different block. preferably older 6.5 or 6.2. if its a 96 your prob better off then a 97. but boring them over really will weaken if, id go ten thou max if it actually needs it and put block hardener in it and get the 2000+ cooling system and you should have reliable engine, also get it balanced as it will help a lot. thats my two cents.

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also, there are lots of options for internals its just dependant on budget. scat crank or forged from pennslieur. mhale makes ceramic coated pistons, you can lower compression slightly and add a bit more boost, I'm interested to see what 19:1 is like. arp is the best hands down would never replace with oem on any vehicle theres a reason they fail. and crazy is correct about marine injectors, i apparently got em and i doubt they do anything. if you want more power bosch makes ho injectors. take a peek at walking j designs as he makes some nice products swell as kennedy diesel and heath of course. do not go to ssdiesel.

 

Thanx WPG6.5!!!!
that kinda sucks, i already have the motor torn down but like I said, even with talking to the previous owner of the motor, I can't verify whether its 96 or 97. And, for the 20 over, I honestly wanted to just hone out the cylinders, but decided to go to a machinest, who told me that pistons weren't even listed 10 over, so I had to go 20.
Still, the motor I have in my truck is a 93 6.5 turbo, tired, but still runs. I was just hoping I could rebuild the 97 and swap out, but now its not looking so great I do have a complete 92 6.2 N/A, from my first K2500, thats has if I remember 197K.
But what your are saying is I should just pull the motor out of 93 and rebuild that instead? I know that motor is has low compression, what if it too needs to go over, are the 93 blocks prone to cracking too? What about a honing and over sized rings, is that an option?
Thanx

 

out of all your options if you do want to rebuild id go with the 6.2. they are strong and dependable, can be bored over and you can swap around parts on the 6.5 and 6.2 to get different power outputs and options. 6.2 yield better mileage and as long as you lower compression you could turbo it. its really based on your budget but the 6.2 block is the best option block wise. once u decide a general route block wise and turbo or not and a few other things give a general price range and your expectations and im sure a few guys including myself could help you design a build to suit your needs.

 

well i have say 97 is not that bad when i'll had over 375,000 miles on my motor never been rebuild and pull my 5th wheel that wgt over 16,500 lbs for many yrs

 

Sorry WPG6.5 and Crazy, didn't see your post, so wrapped up in X-Mas
U guys have given me very valuable info, in turn now I have to decide what to do. Of course, after recovering from too much spent on the holidays
Still, I was kinda thinking bout trying to sell my complete 6.2 to help cover cost in my rebuild, but now U have given me more to think bout.
Like I said before I am not looking for more than rebuilding to stock, maybe, hopefully a lil stronger and of course, longevity!!
I like my Turbo wpg6.5, what exactly would I have to do to lower the compression in 6.2 if I decide to go with that block. And would it be more or less cost effective in doing so?

And Crazy, I like hearing ur 6.5 has/had that many miles on it without rebuild I have a few buddies that their 6.5 are rounding 300,000 too. Have u ever had to rebuild a 6.5 and if so, was it just as good and as strong as before?
Thanx Both of U!!!!

 

No my motor ever been rebuild but just did blow my motor up but i'll had almost 400,000 miles on it pulling 16,500 5th wheel i 'll ended up cracking the block for as right now i have 7.3 idi ford as soon as get back to Fl. i will get me other 6.5 and start over

 

Thanx Crazy!!!!
It would take me many, many years to put that many miles on any vehicle. So it makes me alot more comfortable if I do decide to rebuild my one of the two 6.5(s) I have and sell the 6.2
I am kinda leaning that way since I already have one completely torn down and the other ready to swap out.