6.5 dual stat cooling upgrades back in stock!

[Kennedy]

Just like the title says, we now have the kits on the shelf once again. There are some "out in left field" vendors out there who seem to think that a single stat and restricting the bypass is the answer, but I'll say it point blank nothing could be further from the truth.

[ronniejoe]

I have also advised several people (who have asked me) to avoid the bypass restrictor that is out there. This is a horribly bad idea.

[Robyn]

These clowns with the ANTI DUAL STAT BS have got to be Smoking something...

I agree 100% with John and RJ...

The better coolant flow with the dual stat setup is likely the single most beneficial change in the 6.5 cooling system ever made. (PLUS THE HO PUMP)

The new heads produced by AMG are certainly a game changer when it comes to having better flow in the heads.
When I built the last engine for the Dahoooooley I used an AMG block and AMG heads and then reused the single stat xover and the standard pump (Pump was new)

The rest of the cooling system was fresh. The AMG engine has always ran much cooler than the GM iron ever did..
GOTTA BE THE FLOW THROUGH THE CASTING ?????

[sctrailrider]

Yea once my P400 is done I will be looking into this more...

[trbankii]

There are some "out in left field" vendors out there who seem to think that a single stat and restricting the bypass is the answer

Yet I'll pretty much guarantee that not a single one of them feels that downsizing your exhaust is the answer to better performance. You know, by the same reasoning, holding the exhaust in the engine longer should make more power, shouldn't it?

[Robyn]

There has been lottsa snake oil fixes for the 6.5 and nearly all of them are worthless wastes of time and $$$$$

The 6.5 has always been a problem child when it comes to keeping the temp in check in hot weather and when the rig is worked hard.

Every truck we have had here has to some extent been fussy in hot weather, even when new.

The best fix was to get the fan clutch working before the coolant was at 230 F and then the beast was OK.

[arveetek]

The 6.5 has always been a problem child when it comes to keeping the temp in check in hot weather and when the rig is worked hard.

Every truck we have had here has to some extent been fussy in hot weather, even when new.

With the dual thermostats, HO water pump, modified fan clutch, and all-aluminum radiator, I finally feel comfortable when towing and no longer have to keep my eyes glued on the temperature gauge. I still have to back off the throttle some on mountain passes, but now the engine stays pretty much a constant temperature under load: right in the middle of the gauge.

Casey

[Robyn]

Pretty much how it's done.

Why did GM release these trucks with such a sketchy cooling system ????

Even the New 6.5 rigs I have had were marginal in the hot weather...

[Yukon6.2]

Why did GM release these trucks with such a sketchy cooling system ????

Bean Counters R the Devil.

[More Power]

With the dual thermostats, HO water pump, modified fan clutch, and all-aluminum radiator, I finally feel comfortable when towing and no longer have to keep my eyes glued on the temperature gauge. I still have to back off the throttle some on mountain passes, but now the engine stays pretty much a constant temperature under load: right in the middle of the gauge.

Casey

A better turbocharger is the final piece of the engine cooling puzzle.

All of the cooling system upgrades promoted here through the years did solve the engine temperature problems, but only a better turbo can reduce EGT (which indirectly affects ECT in a max power setting).

Try a Holset HX-35 (1994-98 Dodge Cummins app) for a step up from the GM-x series turbos or install a Holset HX-40 for a more dedicated heavy hauler.