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fine · 08-11-2022, 09:23 AM

hello to all, my cat c9 is blown,wondering if anyone here has pulled c9 or c7 and re installed a c12 in its place, i have a c12 with a transmission,thinking about installing in my sportcoach everything is 2004,any comments

vito.a · 08-12-2022, 01:58 PM

I doubt a C12 will fit. And the C12 is 1000 pounds heavier than the C9. You would also have cooling issues.
"Blown" covers a pretty wide area. I'd pull the cylinder head and see what it really needs.

wolfe10 · 08-12-2022, 02:06 PM

Agree, impractical.

Different engine, different transmission, significantly heavier,

fine · 08-13-2022, 08:23 AM

Quote:

Originally Posted by vito.a

I doubt a C12 will fit. And the C12 is 1000 pounds heavier than the C9. You would also have cooling issues.
"Blown" covers a pretty wide area. I'd pull the cylinder head and see what it really needs.

well i had a blown head gasket,pulled head,cracked in 3 spots,the machine shop said look at the deck,we re prepped deck it was right at max wear 2,000 ths, we put a recon head back on with new injectors,radiator,inner cooler,water pump,end less list of parts, made it about 1,000 miles on, some short trips then a lot of exhaust gases showed up in coolant. took my brother and i 30 hrs to get to the head the first time,that is the depressing part, common man im looking for better news, thanks for the reply though

fine · 08-13-2022, 08:26 AM

Quote:

Originally Posted by wolfe10

Agree, impractical.

Different engine, different transmission, significantly heavier,

i have the engine and transmission together on a pallet

fine · 08-13-2022, 08:30 AM

my radiator shop built me a great new one to,but it is located in the rear also,he sait it should handle up to 425hp

vito.a · 08-15-2022, 05:38 PM

Trade your C12 for a C9.
Or, your reman head and all the other new parts should still be good. Find a C9 short block.

fine · 08-17-2022, 06:02 AM

thank you, i just might look around a bit,i measured out fit and would have to move every thing back about 10 inches with a c12 and its transmission

Hpozzuoli · 08-17-2022, 06:42 AM

I see all the infrastructure work as being too much. Like you said you will have to move everything back. This will mean many new parts and fabrication. Make sure the frame can handle another 1k in weight in that area. I understand the desire to use what’s right there, but a c9 will be much faster.