View Full Version : cummins diesel Q....

07-12-2007, 06:35 PM
buddy just picked up a cummins, there is no intercooler, and in the cooling system there is about a 10" long canister, and he isnt sure what it is for. can he just bypass that or does it do anything important? does anyone have any ideas? also, the intercooler issue, could he not just run less boost, or is the intercooler completely necessary?(hes not worried about power loss but doesnt want to kill the motor)
this is a cummins 12v, and he is going to be putting it into an excivator(spelling).


07-12-2007, 06:50 PM
the early 12V's (pre '91) didn't have an intercooler, so I'd think he could run it without one with less boost. No idea if there were any changes that made them install the intercooler...?:dontknow:

07-15-2007, 09:58 PM
the intercooler is for 1990 and up and the big canaster might be for the air cleaner

07-15-2007, 10:24 PM
thanks for the help, he didnt figure out if he does or doesnt need an intercooler for his engine, but the canister is for the tranny cooler, which he doesnt need

m j
07-15-2007, 11:03 PM
I would run an intercooler
they are cheap on ebay http://cgi.ebay.com/ebaymotors/24-x12-X3-FMIC-TURBO-INTERCOOLER-ECLIPSE-Lexus-Corolla_W0QQitemZ290137546021QQihZ019QQcategoryZ33 742QQrdZ1QQcmdZViewItem

$84 usd

07-15-2007, 11:06 PM
fuck the intercooler you dont need it if your not worried about a power loss

m j
07-16-2007, 12:56 AM
I have yet to see an excavator without one
the motor sits at full scream for 8 hours not like a pickup where it is making power for 5 minutes on a hill

07-16-2007, 08:24 AM
the intercooler with lower the EGT's, less heat stress on the engine. There is no downside to intercooling an engine, aside from the fins can get clogged with dust like a rad( happens to our air compressors and excavators at work). If he keeps an eye on the cleanliness and silicone couplers, it will be better on the machine in the long run.

He might be tight for if hes got a rad, hydraulic cooler, intercooler in the engine bay.