Sideways Thermostat in my 350 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**73kay** · 08-12-2016, 12:37 AM

Title says all, its a 104 in Austin and I have been chasing down overheating issues in my 76 c10. At first I thought it was just because I was using a cheap autozone radiator that came with my 250. I upgraded to a 3 row ebay all alum. radiator and it was marginally better. Then I was thinking that my clutch fan was in far in enough into my shroud, but after removing the fan to install a spacer, I noticed when I looked into my intake water outlet that the thermostat was almost on it's side. I was like what the hell? The housing I got from advance doesn't seat on it and is too wide, the intake seats just fine. Im gonna go to the junkyard and get a real one and not the cheap crap. Wish I took a picture to show you guys. Any of you guy ever have that happen to you?

**MikeB** · 08-20-2016, 11:03 PM

A picture would be nice. But it's been over a week since your original post. Have you found anything yet?

BTW, my truck uses a $120 aftermarket aluminum radiator (Murray) that's listed for six cylinder and 305 trucks. It works just fine with a 350, even on 95-100 degree days. Typical coolant temps are 180-190 on the road, and 190-200 in traffic.

Also have a fan clutch with 17" fan, and the fan blades are 50% in/50% out of the shroud. Water pump is real GM, and t-stat is a high flow Robertshaw model.

08-12-2016, 12:37 AM	#1
73kay Senior Member Join Date: Jul 2014 Location: Indy, IN Posts: 637	Sideways Thermostat in my 350 Title says all, its a 104 in Austin and I have been chasing down overheating issues in my 76 c10. At first I thought it was just because I was using a cheap autozone radiator that came with my 250. I upgraded to a 3 row ebay all alum. radiator and it was marginally better. Then I was thinking that my clutch fan was in far in enough into my shroud, but after removing the fan to install a spacer, I noticed when I looked into my intake water outlet that the thermostat was almost on it's side. I was like what the hell? The housing I got from advance doesn't seat on it and is too wide, the intake seats just fine. Im gonna go to the junkyard and get a real one and not the cheap crap. Wish I took a picture to show you guys. Any of you guy ever have that happen to you? __________________ Andrew 1953 3100 292 T5 1985 K5 Blazer 350 700R4 208

08-20-2016, 11:03 PM	#2
MikeB Senior Member Join Date: Jul 2000 Location: North Texas Posts: 3,597	Re: Sideways Thermostat in my 350 A picture would be nice. But it's been over a week since your original post. Have you found anything yet? BTW, my truck uses a $120 aftermarket aluminum radiator (Murray) that's listed for six cylinder and 305 trucks. It works just fine with a 350, even on 95-100 degree days. Typical coolant temps are 180-190 on the road, and 190-200 in traffic. Also have a fan clutch with 17" fan, and the fan blades are 50% in/50% out of the shroud. Water pump is real GM, and t-stat is a high flow Robertshaw model. __________________ Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, recent AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then!



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