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Mazmart actual detailed how they operate and they are "open" at all times. they just open more as heat increases. Mine restricts flow and routes the oil back into the engine until the oil temp reaches 180F.
Mazmart actual detailed how they operate and they are "open" at all times. they just open more as heat increases. Mine restricts flow and routes the oil back into the engine until the oil temp reaches 180F.
Yes, it is better to say that they close fully the cooler bypass way at the same temp.
Heck--why not just do a water/oil cooler? Oil is cooled by the engines coolant not air.
OD
Yes, I was thinking about it too, smaller dimensions, less weight, more possibility where to place it (a little better weight distribution of the car against front mount coolers).
and with that you would have a place for some little secondary coolant radiators.
I have a friend that has one on a fi s2000--sweet setup.
OD
Does he have the Mocal setup? I just wonder how efficient the liquid coolers are compared to air/air. I found a huge high dollar fluidyne liquid oil cooler on ebay for like $100.00 a while back. I regret not getting it.
Oil is hot, it does about 30% of the cooling in the car (if it flows through the cooler).
The current t-stats flow oil through the cooler at all times, what it adjusts is how much oil goes through cooler vs bypasses cooler. Coolers will get HOT, with just a little oil flowing. Especially without a fan on them. They will cool down quicker with air on them if the thermostat is closed, than if it is open. But, that test is a PITA.
Does this: Rotary Performance - Oil Cooler Thermostat Do what we want done? IE, drop oil temps, make oil last longer, maybe dump more heat from motor (oil cannot dump 30% of heat if not flowing through the cooler.
I looked at those years ago, they are pretty common on other platforms. If you live in a warm climate just get rid of thermostats all together, that is what I did. I never drive my car without a few minute warm up anyway so it's a non issue for me.
I have custom oil lines and used to run a true bypass oil thermostat but deleted it for simplicity and since I run one stock oil cooler (and one large center mount) on the drivers side, I cut that thermostat just leaving the threaded portion and reinstalled it.
Damn .. is it that hot over there? I installed a bypass thermostat for exactly the opposite reason. I have cold climate here and the engine does not warm up under cruising speed with the Original Oil Coolers and the integrated thermostats. Did not get oil temps above 70°C (158°F) in winter...
I have an extra set of coolers, so and extra set of thermostats. I see a modification coming. I just need to figure out if which direction directs the oil through the coolers, and not through the bypass.
I have an extra set of coolers, so and extra set of thermostats. I see a modification coming. I just need to figure out if which direction directs the oil through the coolers, and not through the bypass.
The coolers don't care what direction oil is flowing through them, neither does the thermostat really, but stock it flows in on the port with the thermostat.
You can just make a little plug for the bypass port if you want to use them at full flow all the time.
The coolers don't care what direction oil is flowing through them, neither does the thermostat really, but stock it flows in on the port with the thermostat.
You can just make a little plug for the bypass port if you want to use them at full flow all the time.
Yeah, I think, from looking at the ones cut up, that as the temp goes up, the thermostat covers more and more of the bypass hole. Once it is all the way open, the bypass hole is all the way covered.
Making the plug is what I have to figure out. Or, buy the lower temp ones. Once way is more fun, one way has a lower chance of dumping crap into the oiling system.
Well these are mine... I didn't really measure them, but the top diameter only has to be bigger than the bypass hole, and the lower diameter only has to be smaller. I'm 100% sure just a bolt that fits in the bypass hole would work just as well.
Yeah I mean I guess it is a bypass, but it cracks pretty early and is a small hole. I can't remember exactly but I want to say at like 110F and even when it is closed you still have the oil flowing thru the lines to both coolers and back to the engine. Where a true oil thermostat typically routes oil back to the engine before it hits the coolers.
I can tell that on mine, with the stock thermostat cut (no plug in the bypass hole, oil still flow thru the cooler. Path of least resistance I guess.
Pulled out one of the spare oil coolers. Oil flows through both the hole and the cooler when cold. The only thing pushing it through the cooler is the restriction going through the hole. The T-stat does not plug the hole until it opens (closes??). Is backwards from water thermostat. I tossed it in boiling water. Did not open at 210 degrees. I gently touched it with a torch, opened right up. Tossed it back in boiling water, still did not open. I got a feeling that 194 is conservative.
Legot, I think you just put that plug in and let the thermostat hold it in, right?
I am trying to figure out how to keep the pressure blow off function, with the factory thermostat but cannot think of a case where it would be needed. It would take an incredible quantity of gunk to plug the coolers, or an insanely low temp. Or, is that the purpose of the hole in the center, to allow pressure to push the stopper against the spring and open if necessary.
08-02-2010, 05:23 AM
My 335i's oil temp sits right a 250F in this weather.
