1979 401 cooling issue

[Don S]

..

401's seem to run a little hotter. Mine was punched out .030. It Ran cool enough when every thing was up to snuff.
One time I bought a new water pump. The 401 ran hotter. Apparently it was a pump for a 360. It did check out like my 81 360 pump.
I still had the old pump. the shaft was an 1/8th inch bigger and the old worn down impeller looked like it was more heavy duty in it's younger day.
Some cars rely on full time hot water through the heater core to help cool one of the banks of the V-8s.
Age has allowed me to forget who's V-8s You can mount a tranny cooler between the rocker and the frame on Passenger side to help with the cooling.

BTW I timed at 8*

Good Luck.. Don S..

[fulsizjeep]

Originally Posted by FSJunkie

It's probably lean and/or timed poorly.

It's also a 401 in Arizona. One of the many reasons I like 360's.

My .030" bored 401 runs 195-200 all day long in Arizona, New Mexico, Utah and Colorado.