thermostatic oil bypass

[Edward]

Hello,

I have a oil radiator on my Fulvia. The engine is completely new and I have the original Lancia bypass.
When I drive, the oil temperature is always around 70 degres, which I think is not very good, and sometime if I push a little bit in the revs, it reaches 90° but never more.

Do you think it's a real problem for the engine (I would say that the oil needs to be warmer) and Do you know any possibilities to change the bar (wax ?) in the bypass to delay the opening ? (and to keep the Lancia bypass)

Thanks a lot for your help.

Regards

Edward

[P. de R. Lelercq]

Edward,

Yes, I have often felt this way; modern oils are designed to run at quite high temperatures - around 100°. There is a similar type of thermostat fitted to Evos and 16v Integrales - I assume that the temperature is a bit higher. I fitted one to my own car and it did make a very slight difference - but not much!

I imagine that it would be best to contact the makers to see if there is a range available.

Paul

[Huib]

Or consider to take the cooler out.

[Thomas]

Why was I expecting this comment? )

[ecoangel]

why not leave the cooler in place in summer without thermostat and remove cooler in winter?

[Ed Levin]

removing the oil rad every winter seems like a lot more trouble than finding a bypass with a correct t-stat

[lucas]

If you lower the airflow through the cooler, less heath is taken away.
In winter I used to cover part of the radiator with a sheet of cardboard.......................
There are gril covers, in the same way you could partly(or total) lower the airflow through the cooler.

Lucas

[Edward]

Yes it's true that you can lower the efficiency of the radiator but I would prefer to find the good thermostat.
I dismantled my thermostatic base plate and on the thermostat, which is a Savara, it's write70°-80°, which is really low...

[tim]

Yes but is it working? You need to do a bench test in pan of oil heated up and see it open at c80deg which mine did. Interestingly having fitted it to the car it does not open on normal driving as evidenced by the oil rad staying cold oil temp guage also stays half way from 60 to 100 so I suspect my car runs cool anyway. If we have a heat wave I will go out for a blast and report further - or strip the bloody thing down again!!

[tim]

I am pleased now that the weather has warmed up I can report that the HF oil thermostat does work allowing oil to pass to the oil radiator at a oil temp guage reading just under 100.

Before the oil rad stayed cold. Prrof that it only needs cooling on exceptional circumstances.....