69 K20 6.2 Diesel Conversion Engine Mount Location - The 1947 - Present Chevrolet & GMC Truck Message Board Network

The Youngen · 12-10-2015, 11:57 AM

I just received my cab back from the paint shop to find that the 6.2 diesel is hitting the firewall.
Since modifying the firewall is out of the question, the engine must be moved forward. This is fine since the drive-shafts will be custom made and the transmission cross-member is still unbolted.
Since a 6.2 diesel is roughly the same dimensions as a big block, I assume i would move them to the "forward holes." F.Y.I. Im using the 69 engine cross-member with small block mounts and stands. Fits like a glove in the frame.
My question is the forward holes. There are three holes on the passenger side and 4 on the driver. Shouldn't they match on each side so the engine is moved equally forward, keeping it straight with the frame?
Do you use the forward most holes and the frame or cross-member compensates?
Thanks guys

andrewmp6 · 12-12-2015, 08:39 AM

The only options i see are a body lift or trying to push the motor as foward as you can.

**special-K** · 12-12-2015, 09:26 AM

I think moving to forward holes is what you want. The engine doesn't need to be as far back as GM put them in 4wds. Lots of room in front to allow it. On a '68 K/20 with a 700R4 I moved the 350 forward to compensate for extra length in trans and was able to leave the drive shafts alone

**kwmech** · 12-13-2015, 01:12 AM

I did a swap years ago and ended up having to drill holes in the frame rail to put the engine in a specific place so it cleared the firewall and also the radiator with the large fan clutch. This was after I changed over to a serpentine belt also.

12-10-2015, 11:57 AM	#1
The Youngen Registered User Join Date: Oct 2010 Location: Westbrook CT Posts: 81	69 K20 6.2 Diesel Conversion Engine Mount Location I just received my cab back from the paint shop to find that the 6.2 diesel is hitting the firewall. Since modifying the firewall is out of the question, the engine must be moved forward. This is fine since the drive-shafts will be custom made and the transmission cross-member is still unbolted. Since a 6.2 diesel is roughly the same dimensions as a big block, I assume i would move them to the "forward holes." F.Y.I. Im using the 69 engine cross-member with small block mounts and stands. Fits like a glove in the frame. My question is the forward holes. There are three holes on the passenger side and 4 on the driver. Shouldn't they match on each side so the engine is moved equally forward, keeping it straight with the frame? Do you use the forward most holes and the frame or cross-member compensates? Thanks guys Attached Images __________________ 71 Chevy C10 350/TH350 71 GMC C20 350 (donor truck) 82 Chevy K20 Suburban 6.2/TH400/NP 95 Chevy 4x4 1500 Tahoe 6.5T/4L80E 04 Chevy 4x4 3500 Silverado 6.6T Duramax/Allison 1000 (work truck) 09 Chevy Aveo 1.6L/5 speed manual

12-12-2015, 08:39 AM	#2
andrewmp6 Registered User Join Date: Jan 2009 Location: Louisville,Ky Posts: 5,811	Re: 69 K20 6.2 Diesel Conversion Engine Mount Location The only options i see are a body lift or trying to push the motor as foward as you can.

12-12-2015, 09:26 AM	#3
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: 69 K20 6.2 Diesel Conversion Engine Mount Location I think moving to forward holes is what you want. The engine doesn't need to be as far back as GM put them in 4wds. Lots of room in front to allow it. On a '68 K/20 with a 700R4 I moved the 350 forward to compensate for extra length in trans and was able to leave the drive shafts alone __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

12-13-2015, 01:12 AM	#4
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,713	Re: 69 K20 6.2 Diesel Conversion Engine Mount Location I did a swap years ago and ended up having to drill holes in the frame rail to put the engine in a specific place so it cleared the firewall and also the radiator with the large fan clutch. This was after I changed over to a serpentine belt also.



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