Thread: Thermostat vs Moroso Washer

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I just finished dealing with a similar problem on my 289. I installed a new 190 t-stat, shroud and 6 blade flex-fan and solved the problem. My location is SE Texas and the dog days of summer also. Now it will idle under the carport at 190. I didn't notice what year your Jimmy was but is there room for a shroud in your set up? If so, I highly recommend it.

Also, when my t-stat opens the temp drops to 170 and then eases back up to between 185 and 190.

Originally Posted by MelloYello

.....,I didn't notice what year your Jimmy was but is there room for a shroud in your set up? If so, I highly recommend it.

Em,
On a mechanical fan or a puller electric mounted to the back side of the radiator a shroud is a necessary part of the cooling solution. However, on a pusher fan a shroud mounted in the front is going to block off about 50% of the radiator surface from direct velocity head (pressure from the car pushing into the air), and will severely restrict air flow through the radiator. A pusher fan runs without a shroud to allow maximum unrestricted air flow running down the road, and the fan mounted tight to the radiator to push air through the fan area when stopped, or moving slow in traffic.