TR2/3/3A Overheating 1957 TR-3

I have a 1957 TR-3 with a upgraded engine; 87mm pistons, oversized valves, Isky cam, Mallory ignition headers and a Monza exhaust system. The car went through a complete restoration in Ottawa, CA in 1988. The original owner set it up to race, but never did as he was transferred out of the country. The car passed through two additional owners before I purchased in in 2012.During this time period the car accumulated 7k miles.
Since I have had it, I removed the Webers, water injection system and mecca oiling sytem; all of which leaked like a sieve. I had a new set of headers built for it, re-built and re-installed the SU's, installed a new Hayden fan and a Monza exhaust system.
The temp down here in Orlando this summer has been brutal! It is now Fall and we are still in the 90's. I recently returned from a car function and got caught in bumper to bumper traffic. I slowly watched the temp gauge go up between 208-230. It never really boiled over, but was doing alot of hissing. I flushed the radiator last week and put new antifreeze in it. On a drive to another car function it seem to stay right between 185 and 208

Is there some additive I can add to help the heating situation? I was looking at buying these radiator air deflectors?

Suggestions almighty GuRu's ???

Dick Vinal

No guru here, but I see you do not mention the radiator -- probably the single most important component of the cooling system.

It is possible that (being in Ottawa) it was never given much attention in the 'complete restoration'?

Even if it does not leak several things can happen to the rad over time that impede performance, including blockage due to sludge and mineral build-up and also loss of good contact between the tubes and the fins.

A good radiator shop (getting harder to find these days) should be able to help you assess the condition and suggest what course to take if it tests out as less than ideal (rodding, re-core, replacement).

From my experience, these cars are prone to overheating in slow conditions, worse in hot weather of course. They usually cool right down at speed. Certainly cleaned or re-cored will help fix the problem as will an upgraded fan or an additional electric fan.
https://www.macysgarage.com/myweb6/Parts/triumph_accessories.htm
https://www.englishparts.com/produc...ml?partner=googlebase_adwords&kwd=&origin=pla

Tom

Does your car have the cardboard radiator shroud? Every little bit helps....

The best way to prevent a TR3 from overheating while sitting still is with an electric fan. The stock fan does not move enough air to cool the engine on a hot day if the car is not moving. There is also a tropical fan option, but it is hard to find. If you go electric, then you may need to convert to an alternator to handle the extra electrical load.

Although I also replaced the radiator and added the shroud to my TR3 at the same time, I haven't had an issue at all since adding the Macy's Hurricane fan to my car.

Bill
TS63273L

I have ordered one, assume it will work with the electric fan on back side of radiator?

Did upgrade to a 100a alternator and I have a total Mallory ignition.

Redoakboo,

If you're talking about the Macy's Hurricane fan, when I spoke to Mark Macy before buying it, he told me I wouldn't need the electric fan that I had just bought so I didn't put it on. It still sits in its original box with along with the wiring harness. I've been stuck in 90 degree bumper-to-bumper Boston traffic for an hour and the needle barely moved.

Bill

Thanks for the recommendation, BillyB, now I know what to ask Santa for in a couple months!

I used an electric pusher fan for extra cooling in slow traffic, up mountains, long traffic lights etc. It did the job but I suspected it also blocked a lot of airflow when the cvar was at speed.

Eventually I got a tropical fan and ditched the electric. Now the engine is fine under all conditions and even looks correct.



I would expect similar results with the Macy fan.

Except the Macy fan won't look correct. Of course, the electric ones don't either but they are hard to see. The only problem with one like yours is finding one and if you do then paying for it. Here's an interesting earlier discussion:
https://www.britishcarforum.com/bcf/showthread.php?93557-TR3-Tropic-Fan
Tom

https://bellingham.craigslist.org/pts/d/triumph-tr4-parts/6311440081.html
Here is a tropical fan sitting in a pile of early tr4 parts. I tried to buy it separate, but the guy would not have it. I told him I was Randall, still no sale. It might just be worth the 300.00 if you need any of the other stuff!!!
steve

They come up on eBay regularly, there are a few there at the moment:

https://tinyurl.com/ydc6lg92

https://tinyurl.com/y7vzzaz9

https://tinyurl.com/ydeq6ft8

Probably cost more than some electric fans, about the same or a bit less than the Macy fan.

All options are reasonable, just saying that availability and cost are not necessarily obstacles.