International Full Size Jeep Association
Home Forums Reader's Rigs Tech Library Trail Stories FSJ-List
International Full Size Jeep Association  

Go Back   International Full Size Jeep Association > Tire Kickin' > General FSJ Tech

Thread Tools Search this Thread Display Modes
Old 09-08-2018, 03:49 PM
Don S's Avatar
Don S Don S is offline
Geriatric Doctor of FSJs
Join Date: Feb 06, 2002
Location: Burleson TX
Posts: 5,609

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..
Sold our 1976 Wagoneer 406, MC4300, TH400, QT, TruTrac, 2" lift, 31x10.50s, duel Optimas,
It’s took us over 161 Colorado Mountain Passes, 3 Jeep Jamboree USAs & 2 Ouray Invasions from 1985 to 2010
Reply With Quote
Old 09-17-2018, 06:27 AM
fulsizjeep's Avatar
fulsizjeep fulsizjeep is offline
Señor Jackhead
Join Date: Aug 21, 2002
Location: Jubilee Jeeps.SWCO
Posts: 22,243
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.
Ran when parked.
88 GW, 401/727/208, 5" lift, D44s/4.10s/locked up, 35s and a few Evil Twin mods, and a few TT's Fabworks mods,
76 401 Wag, 77 401 Wag, 77 401 J20
Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Ready to build my 401 - where do I start - looking for input from 401 builders Jay-ten General FSJ Tech 3 02-21-2009 04:21 PM
Rehashing, err, re-confirming '78 401 into an '86 GW w/ 727 tranny gotchas SeanKHotay General FSJ Tech 2 05-04-2006 11:24 AM
401 swap/ balancing info justin'sbig7 General FSJ Tech 1 02-01-2006 02:11 PM
Hot 401 in 89 Big step in cooling!!! khurst General FSJ Tech 9 12-21-2002 08:06 AM
Help please Dan G General FSJ Tech 36 09-02-2002 08:47 AM

All times are GMT -6. The time now is 04:51 PM.

Powered by vBulletin Version 3.5.4
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
corner corner