[TR] TR3A Radiator Fan

[Alex & Janet Thomson]

Retarded timing can make an engine overheat under small-to-medium loads such as simply climbing long grades. A worn rubbing block on the points of an early 60’s Chevy pickup with a 235 6 cylinder taught me that!

 

Alex Thomson

’71 TR6

’73 GT6MkIII

 

From: Triumphs [mailto:triumphs-bounces at autox.team.net] On Behalf Of TERRY SMITH
Sent: Sunday, March 11, 2018 3:23 PM
To: Jim Henningsen; Geo Hahn
Cc: Triumphs
Subject: Re: [TR] TR3A Radiator Fan

 

General question for all. To what degree (no pun intended) can the timing affect temperature if it's off?




On March 11, 2018 at 12:15 PM Geo Hahn <ahwahneetr at gmail.com> wrote:

On Fri, Mar 9, 2018 at 1:48 PM, Jim Henningsen <trguy75 at gmail.com> wrote:

 

1961 TR3A, stock motor setup, with stock radiator that includes crank hole.
My temp even on a 68 degree day in Florida today runs at the mark between
185 and 230.  Assume 200 or a little higher?...

 

In my opinion you have a problem that no fan will solve.

 

I routinely drive my TR3A (with a crank hole) in 100+ temps with no overheating or even the high temps you are seeing under much cooler conditions.  But I have cleaned out the block, re-cored the radiator, mostly blocked the bypass, have a Tropical Fan and added an air-dam.

 

Some of those steps may be uneccessary but I suspect the radiator core and/or accumulation of crud in the block may be at the heart of the issue.

 

Also worthwhile to verify that your gauge is being truthful - get a second opinion with an IR thermometer.

 

Geo


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