1966 Ranchero Running Hot

11 posts 3 contributors 5,445 views

rnj1966OP

Member since Jun 2014
5 posts
Lincoln, CA, USA
1 vehicle in the registry

Jun 4, 2014 at 7:01 AM

I have a 1966 Ford Ranchero Inline 6 with 3 on the tree, we just replaced the thermostat but it is running on the hot side when going over 55, It runs at mid range temp when driving around town but as soon as you go over 55 it runs just under the line for hot.
Anyone have any suggestions?

edited Jun 4, 2014 at 9:43 AM

jdmeaux

Member since Jan 2009
525 posts
Lafayette, LA, USA
1 vehicle in the registry

Jun 4, 2014 at 10:06 AM

When was the last time the radiator was flushed? Over the years, the radiator may have build up minerals that are clogging the passages. You may have to replace it.

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rnj1966OP

Member since Jun 2014
5 posts
Lincoln, CA, USA
1 vehicle in the registry

Jun 4, 2014 at 10:37 AM

We just flushed it out and cleaned the radiator, seems to be circulating well, really appreciate the reply though

edited Jun 4, 2014 at 10:40 AM

CHUCK04

Member since Jun 2014
6 posts
Torrance, CA, USA

Jun 7, 2014 at 9:31 PM

Have you checked the radiator cap as to holding pressure?

rnj1966OP

Member since Jun 2014
5 posts
Lincoln, CA, USA
1 vehicle in the registry

Jun 9, 2014 at 10:49 AM

Yes we checked that also, Is it possible that the 65-70 speed limit is to much for the car and thats why it runs hot, do you know?

rnj1966OP

Member since Jun 2014
5 posts
Lincoln, CA, USA
1 vehicle in the registry

Jun 9, 2014 at 10:50 AM

By the way a very nice looking car you have there

CHUCK04

Member since Jun 2014
6 posts
Torrance, CA, USA

Jun 9, 2014 at 12:24 PM

Apparently no leaks under pressure? Are you using a recovery bottle?
Timing too far advanced? Valves to tight? Running too lean?
Thanks for compliment on car...22 year project,so far

rnj1966OP

Member since Jun 2014
5 posts
Lincoln, CA, USA
1 vehicle in the registry

Jun 9, 2014 at 1:24 PM

I believe the answer lies in the timing and carb adjustment as well and we are going to check all that this weekend and yes we have a recovery bottle

CHUCK04

Member since Jun 2014
6 posts
Torrance, CA, USA

Jun 9, 2014 at 3:49 PM

Hope you find the problem...I HATE overheating!

CHUCK04

Member since Jun 2014
6 posts
Torrance, CA, USA

Jun 9, 2014 at 5:17 PM

One last idea... What fan are you running, 4 blade?
You might think about a 2500 cfm electric puller fan.

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