Oil cooler thermostat

Hi.

I´m going to fit an oil cooler on my Triumph T140 outfit. Since it´s getting used year around, I´m going to fit a thermostat as well. I´ve found this Jagg By-pass valve/thermostat. The Automatic one. http://www.jagg.com/by-pass.html The shop told me it opens at 103 degree C and is fully open at 108 degree C. Does this sound about right? These are are probably more made for HD´s, but wouldn´t they be okay for a Triumph as well?

Dan

Hi Dan,

103C sounded a little high to me; that calculates out to about 217.5F. That's around 5 degrees F above boiling point of water.

From the Jagg brochure http://www.jagg.com/pdf/instructions/4050-instructions.pdf they state:

"As the oil temperature approaches 185˚F the actuator begins to stroke. By 195˚F the actuator is fully stroked, closing the by-pass hole and directing all the oil to
the oil cooler (figure 2)."

The 185F - 195F sounds more like it.

Have you taken the oil temp? Does it really need a cooler?

I run a oil cooler on all my bikes that I have owned, I have done so for 39 years on my Norton and all my Triumphs I have owned without a thermostat, I have always had long life out of my motors and even run in winter with the cooler and have never had any problems with the oil being to cool.

Ashley

ashman said:

I run a oil cooler on all my bikes that I have owned, I have done so for 39 years on my Norton and all my Triumphs I have owned without a thermostat, I have always had long life out of my motors and even run in winter with the cooler and have never had any problems with the oil being to cool.

Ashley

Click to expand...

Dan, Where do u live and what are the temp variations.. Here in Oz, cold is +5c get the occasional -minus here and there.. If i was experiencing minus degrees, snow and freezing conditions (i'd take the bus :lol: :lol: ) But thermostat in oil flow circuit is questionable from where i veiw it..

How cold is it where you need to consider a thermo in the system ????

Hi.
DwS, Thanks for the link, I have bin looking at Jagg´s website, but didn´t finde the instruction. 185-195F is 85-90,5 C, sounds better to me.
I haven´t checked the oil temperature. We went on a 3 weeks summer Holiday last year, with the two of us and camping gear. We planned to do the first 600km (400 miles) in one day on the highway. It was on a pretty hot summerday, probably around 30degree C. The engine was getting hot, then we hit some heavy trafic jams and roadworks, then it got really hot and started leaking. I know an oilcooler isn´t going to help much if you´re in a trafic jam, but at least it won´t be overheated already before you hit it. The weight of the sidecar is 70kg (154 Ibs), but the Wind is the what gives the engine a hard time. You clearly feel if you have the wind in your face or in your back. In your face and it´s like going uphill, Wind in your back and it´s flying.
The reason why I want a thermostat is that I´m also using it in the Winter. Our Winters here in The Netherlands are colder then in Oz, we do get snow every so now and then. I usually go to a BSA Winter rally in january, I saw -8 degree C on the way there last year.

Thanks, Dan.

Dan instead of putting a thermostat in the oil cooler system when it comes to winter just put a cover over the oil cooler, here in my home state it only gets down to about 5c at the coldest of winter nights, when I was working I started work at 6am so I was riding in them temps with my oil cooler and the bike still ran the same as it does all year round, the idea with a oil cooler is to get your oil temp cooled down when it returns to your oil tank and before it goes back into your hot motor, after 39 years of riding my Norton with a oil cooler the cooler its runs the better it goes, in our summers we get day temps from 30c to over 42c and our nights come down to about 26c and our summers can last for 8 months sometimes like this year.

Ashley

The T140's have less oil capacity then oil tank T120's just to start with so anything that adds capacity can't hurt, such as an in line oil filter (either return or pressure side, your choice) and an oil cooler/thermostat and associated hoses. I personally like the idea of a thermostat so that your engine and oil will come up to temp quicker on initial start ups, especially considering that's when most of the wear occurs on an internal combustion engine. I think your use would be considered 'severe' so I would also be using a good synthetic 20w-50 made for motorcycles and changing it often. Don't install the cooler so that it blocks cooling air to your cylinder head like some do. I guess if a guy was clever he could include a shroud for his oil cooler that incorporated a fan from a Jap bikes radiator (downstream side) and have a temp switch (auto or manual) for when the going got slow...just trying to think of what could help...Mark