Cummins Big Cam 855 Lockplate Tightening Sequence Discrepancy

No Sir, lot more to it than that. Low flow & High Flow are 2 different animals including the radiator.

The front section of the water manifold is different as well, and the Low Flow manifold has restrictors under all 6 ports where it bolts to the heads. Finding the needed parts to convert would probably be a chore, not counting buying a radiator…

 

Took a side job once, guy wanted me to do an engine swap on a 1979 Transtar (this was a long time ago).

What does he bring me? You guessed it an 88NT Low Flow.

I told him it it will be very expensive and you will not be happy.

I got it done, a 9670 low flow radiator shimmed up about a half inch works.

Everything worked great until winter hit. Guess what? no heat! Not enough flow through the heater core.

That was the best "I told you so" ever.

 

When they worked properly they wasn’t bad, but they could be a bear when they didn’t. Those radiators have a divider in them, when the seal goes bad it can be hard to track down. That setup was Cummins stab at pleasing the e p a….

 

Never recall that being an issue with one, mine certainly doesn't suffer from it.

 

Cummins was trying to keep the OEM's from having to design and install a CAC in order to accommodate their engine. The "coldest" water circulates through the JWAC to reduce intake air temps. The problem is, every part in the system has to be performing near flawlessly when summer temps hit, because there simply isn't enough volume of water to displace heat if it isn't if you're gassing on it.

 

Can't help with the other stuff, but here is your dataplate off quickserve.