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#1 |
Registered User
Join Date: Jun 2009
Location: Fort Erie , Ontario
Posts: 525
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I am in the middle of doing a conversion on my, which once was a 1976CC C30 and now a K30. Origanally it was a non a/c cab but want to convert it to an a/c cab. I have a 6.2 diesel with a 6.5TD top end. Has anyone fit the 6.5td in with the a/c in their 73-87/91. I understand that it will not fit without some modification. Any modification info would be nice. Pics would be even better. I have read before an s10 a/c box needs to be grafted on? Also read a possibility of a van a/c box. But I have not really found any solid info or someone with the experience on doing this conversion.
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#2 |
Registered User
Join Date: Jun 2009
Location: Fort Erie , Ontario
Posts: 525
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Re: 6.5TD with a/c.... pics/info
No ones has put a 6.5td top end on a 6.2 diesel and had to deal with the a/c accumulator box.
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#3 |
Registered User
Join Date: Dec 2007
Location: Palmer, Alaska
Posts: 13,821
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Re: 6.5TD with a/c.... pics/info
I have read all the same info. From looking at pics of the 6.5 turbo I don't know how you could mod the underhood air box to clear. The downpipe wants to occupy the same space as the stock a/c box. You could go with an aftermarket A/C setup for around $1000 or pick up a used Banks set-up for a few hundred more...
I'm picking up a 6.5 turbo set-up in the next few months, but my trucks are non a/c so I won't have that issue. Posted via Mobile Device
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![]() ![]() Last edited by joe231; 02-12-2012 at 02:29 PM. |
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#4 |
Registered User
Join Date: Jun 2009
Location: Fort Erie , Ontario
Posts: 525
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Re: 6.5TD with a/c.... pics/info
Yes I have thought of the banks sidewinder setup. But to find one... and at a resonable cost at that. Aftermarket a/c was a thought also, but still to costly for me. There must be a little cheaper route. I have thought about makeing a custom exhaust manifold or there must be a way to mod the a/c accumulator box a little. I think that I may go to the wrecking yards and look at how much different the van accumulator a/c boxes. I would think they would be a little more compact.
I don't have a tube bender so what are your thought on a square tube exhaust manifold. I could use a cutoff saw for some 45*. Or just purchase a tube bender so I could make some tube manifolds to move the turbo forward. Another thought of mine would to modify a set of military 6.2L headers which I have. Cut a hole for a turbo pipe at the front and weld back up? |
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#5 |
Senior Member
![]() Join Date: Apr 2001
Location: Alexandria, MN
Posts: 1,462
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Re: 6.5TD with a/c.... pics/info
i Helped a student of mine swap a 6.5TD into an 82 K10 this summer and fall, and yes the turbo and downpipe want to occupy the same space as the AC box....HE decided to make it a summer cruiser and delete the heater/ac altogether, cuz him bein 18, the turbo meant more I guess... I dont look at things the same way now at 38.. hahah.... again what was said above is true, the banks kit will be needed or a bit of fab work to the top end of the engine.... hope that helps...
--Mike
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63 C20 2WD, 230/SM420/4.11 73K 68 C30 dump truck, 327,SM425,4.56 66K original 68 C10 2WD SWB Stepper, 250/3-tree/3.73 66K.... Wifes 68 Buick Skylark Custom Conv., 350/TH400/2.56 In our family since '79 69 GMC 1500 SWB 2WD, 350/TH350/3.73 posi... 70 K10 SWB 4X4 4-sp,ps, pb, tilt, buckets, console, sliding back window (Need AC parts) WIP 72 Chevy K20 4x4 350/350/205/4.56 donor 72 Vette 350/M21/3.70 posi, triple black and super fast 84 Olds Cutlass Brougham 350/2004r/4.11 was Dad's |
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#6 |
Registered User
Join Date: Jun 2009
Location: Fort Erie , Ontario
Posts: 525
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Re: 6.5TD with a/c.... pics/info
Let me ask this does the exhaust manifold touch the a/c box? If not I might be able to move the turbo forward or toward the intake. With a little fabricating.
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#7 | |
Registered User
Join Date: Dec 2007
Location: Palmer, Alaska
Posts: 13,821
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Re: 6.5TD with a/c.... pics/info
Quote:
I'm not familiar with the 6.5 stuff, but I wonder if you could flip the turbo assembly around 180* and bolt it back to the manifold and maybe reclock the driven side housing? That would help with both the clearance at the A/C box and maybe give enough room to snake the downpipe inside the frame? I'm also not familiar with the hummer headers. If they are individual tubes it wouldn't work very well. There is a company online that sells pre made header flanges for the 6.2/6.5 diesels. http://www.stans-headers.com/gm_flanges.htm I have thought about building my own manifolds but I would have to pick up a bender as well. I would love to build a custom center mount set-up... Posted via Mobile Device
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#8 |
Registered User
Join Date: Jan 2009
Location: Tomball,Texas
Posts: 42
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Re: 6.5TD with a/c.... pics/info
What about a vintage air set up? Then you won't have the big a/c box. It's not the cheapest way, but you get new a/c parts that will probably cool better and a cleaner firewall.
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#9 |
Registered User
Join Date: Aug 2010
Location: White City, SK
Posts: 411
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Re: 6.5TD with a/c.... pics/info
Iirc, 4bt.com has a couple conversions where an s10 a airbox has been used.
Posted via Mobile Device |
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#10 |
Registered User
Join Date: Jun 2009
Location: Fort Erie , Ontario
Posts: 525
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Re: 6.5TD with a/c.... pics/info
I must look for the s10 airbox conversions.
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#11 |
Registered User
Join Date: Feb 2012
Location: WI
Posts: 13
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Re: 6.5TD with a/c.... pics/info
I converted my 83 6.2 auto suburban to a 93 6.5 nv4500 5 speed. This is an ongoing progect for me and if my body work and paint turn out good i plan on getting the vintage air setup... I know what your going through and i ended up cutting the ac off the box and throwing some duct tape on it for now to get by with a working heater. I like the way the vintage air setup looks and more room for the turbo and exhaust with it all off the firewall.
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#12 |
Registered User
Join Date: Jun 2009
Location: Fort Erie , Ontario
Posts: 525
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Re: 6.5TD with a/c.... pics/info
Yes mine has been an ongoing project also 1976 CC 4x4 conversion 93 6.5TD and soon to be nv4500 also. I have just recently purchased a a/c cab setup for my truck and want to convert it from a non a/c cab to a/c cab. I no the gen air is there but don't really want to purchase it. I am more into modifying what I have.
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#13 | |
Registered User
Join Date: Dec 2007
Location: Palmer, Alaska
Posts: 13,821
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Re: 6.5TD with a/c.... pics/info
Quote:
Posted via Mobile Device
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#14 |
Gentleman Jim owner x2
![]() Join Date: Oct 2010
Location: West Des Moines, IA
Posts: 464
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Re: 6.5TD with a/c.... pics/info
Factory A/C is a b*tch to get it to work right. I had to hybrid a square body S-10 box into my original one by cutting, gluing, and bondo-ing. It makes for an extremely tight fit, but it works. Only problem then was that I had to use the S-10 accumulator and dryer, so I had to have custom pressure and return lines built for my truck. Still, it was cheaper than a vintage air set up.
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1975 GMC Gentleman Jim #1 -357 / 700r4 1975 GMC Gentleman Jim #2 -350 / TH350 |
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#15 |
Registered User
Join Date: Jun 2009
Location: Fort Erie , Ontario
Posts: 525
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Re: 6.5TD with a/c.... pics/info
Is it possible to run a custom made spacer between the turbo and exhaust manifold to push turbo closer to the intake lets say a couple of inches. Doing this may give more clearance for the a/c accumulator box. The 6.5TD exhaust manifold itself does not touch the a/c acculator box? Just the Turbo right?
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#16 | |
Gentleman Jim owner x2
![]() Join Date: Oct 2010
Location: West Des Moines, IA
Posts: 464
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Re: 6.5TD with a/c.... pics/info
Quote:
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1975 GMC Gentleman Jim #1 -357 / 700r4 1975 GMC Gentleman Jim #2 -350 / TH350 |
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