6nz cat 175 thermostats

Not 100% on these numbers,so check on them, but i believe they are numbers your looking for???


4W4011- 170F
2485513- 180F
2477133- 190F
7W0371- 200F

 

Why would you want a truck to run that cool?

 

you don't want it to run too cool. put a 180 and a 190 t-stat in, it works great! also if you have the $$$ install an a-cert high flow water pump. it will pull the hot water away from the liners faster. you will have to change the outer t-stat housing and the back plate on water pump for this to work. and maybe the oil cooler neck if you have clearance issues.

 

Have to agree. I got my first real start turning wrenches on demo derby cars so I got instilled in my young brain that heat's the enemy. Ran those cars with no thermostats just trying to keep it going till the final round. Now fast forward 8 years to my truck driving / owning / mechanic career and 'heat' isn't nessecarly the enemy but overheating is what you wanna get worried about. Driving older trucks with lower designed operating temps I got real concerned whenever I would drive my old man's new truck around all day at 180. But I finally had to figure that those engineers at CAT might just be smarter than me. Keep your cooling system in it's entirety up to snuff is the biggest deal, clean A/C radiator, charge air cooler, engine radiator, oil or trans coolers that may be mounted up front. Fan clutch, fan clutch air hoses and solenoids. Few months ago I lost my fan clutch pulling up a hell of a mountain loaded and got my truck up to 230 got me real concerned. After replacing solenoid, hose and clutch (we think it was a deteriorating air hose that took out the clutch) for about 3 days driving it I could swear my Pete sounded different, I was all worried thinkin I took out my head gasket or messed up a liner or something. Then a ol boy told me about the 'penny trick', which I wish I knew when I lost my clutch, and also I quote 'A Cat ain't runnin right unless it's runnin hot'. Amazing how advice from good ol boys who have been truckin forever can put your mind at ease.

I can see your situation though, last summer we had to haul a backhoe up to the top of that same mountain pass by our house and got all sorts of warning lights on my dad's 07 (has a C-15 Acert MXS) and It would've been nice to be able to cool it down to 150-120 before starting the climb. Weren't even heavy as per over the road, but heavy for that pass it has a 60,000 weight limit and we were close to that if not a bit over. I'd try getting in touch with Mr. Haney. I know that dude makes bookoo power with Cat's and would sure know anything you'd need.