More questions! Which Chevy thermostat to cut down?

[John Larkin]

I keep reading that a Chevy 350 thermostat can be trimmed to fit but what year and model should I ask for? I guarantee if I guess I will get the wrong one.

I have to increase my coolant temperature. I failed emissions this morning on CO and am pretty sure the 160 thermostat is not helping my situation. That and I may get a fresh O2 sensor just for giggles since I have not replaced it in 15 years.

 

[whitehot1]

I keep reading that a Chevy 350 thermostat can be trimmed to fit but what year and model should I ask for? I guarantee if I guess I will get the wrong one.

I have to increase my coolant temperature. I failed emissions this morning on CO and am pretty sure the 160 thermostat is not helping my situation. That and I may get a fresh O2 sensor just for giggles since I have not replaced it in 15 years.

I have a few Buick turbo v6 thermostats for our 86-87 engines. 180 or 195 degrees if you want to try one out to see if it helps let me know and i will send it out today. PM me your address and it's yours.

 

[John Larkin]

I sent PM, thanks alot!

 

[novaderrik]

use cardboard to block enough of the radiator that it runs at your desired temp long enough to pass the test..

 

[whitehot1]

I sent PM, thanks alot!

Got the PM. I will be going to the post office shortly.

 

[whitehot1]

PM sent

 

[John Larkin]

Someone suggested put a manual cutout switch on the fan to accomplish the same thing.

 

[1KWIKSIX]

I cut down a small bl0ck Chevy 170 deg thermostat.

 

[Coelacanth]

I had to cut down my 160-degree T-stat too...even though it was supposed to be the exact correct part number. I think most current replacement T-stats, excluding the expensive repro units, will need to be cut down.

 

[John Larkin]

Stock size thermostat 180° = Duralast 15848. OEM fit, no cutting needed. Bought one after work. Piece of cake.

Car idles with A/C on @ 187°, A/C off about 182°, smooth as silk. I posted this for the search function.