Oil cooler on 20v

**limbo** · 26-01-2006, 12:27 AM

mate my 20v didn't have any problems warming up in the morning. I only noted that if i cruised at 100km on the freeway for about 1/2hr then it would drop to about 1/4 temp. That's the worse that happned.
Anyway getting a thermostat should be good. ANyone recommend where to get one?

**Dom-AE71** · 26-01-2006, 12:29 AM

what sandwich plate was your mate using with his 20v setup? was it in an AE86/AE71

if so, its most likely he was using an AE92 oil cooler and sandwich plate which utelises a bypass method and is not a full pressure type setup im enquiring about in my post.

**oldcorollas** · 26-01-2006, 04:06 AM

Originally Posted by limbo

mate my 20v didn't have any problems warming up in the morning. I only noted that if i cruised at 100km on the freeway for about 1/2hr then it would drop to about 1/4 temp. That's the worse that happned.
Anyway getting a thermostat should be good. ANyone recommend where to get one?

so what was happening to the oil temp?

oil temperature is arguably more important that water temp... since the oil is usually hotter than the water, the water is just there to keep oil cool enough

the result of cold oil is too high viscosity and poor bearing films, but in the long term, a build up of shite that would usually becomevapour at operating temp (ie fuel and water that both condense in the oil)... oil will last longer from both lack of overheating (and burning) and lack of undercooling (boils off volatiles) when you have thermostat

both Permacool and Mocal make nice thermostats..

**limbo** · 27-01-2006, 09:10 AM

Main reason that your oil cooler is different from you Radiator is that the radiator is taking the whole front side of your engine bay so its cooling is efficent. Most oil coolers are not more than 30cm x 20 cm at most. If you look at the 16v setup its only 15x10cm and it does not have a thermostat. I'm sure toyota would have provided one if there was a requirement for the thermostat or if it effected the enine's performance/lifespan

Originally Posted by -GT-

I'd be more worried about the temp of the oil, not so much the engine. Yeah, the water thermostat will keep the engine at temp, but if you're running full flow at cruise in cold conditions, the flow rate through the cooler will be slow enough to ensure the oil gets max cooling, and it will drop well out of operating temp range.

I heard the same things that you don't need a thermostat but with the big range of operating conditions my car goes through and the large oil cooling capacity of my system i just felt it was the best option to keep things steady. For it to be big enough to handle hot track days its going to cool way too much at low load cruise at speed in cold temps. For not much more money its peace of mind, and it helps the oil come up to temp quicker at startup too.

If your water cooling system needs a thermostat why doesn't your oil???

As for the photos, i've taken some and spent 1.5 hrs trying to upload them but photobucket is being a bitch. I'll try again later...

**Dom-AE71** · 27-01-2006, 11:14 AM

Originally Posted by limbo

Main reason that your oil cooler is different from you Radiator is that the radiator is taking the whole front side of your engine bay so its cooling is efficent. Most oil coolers are not more than 30cm x 20 cm at most. If you look at the 16v setup its only 15x10cm and it does not have a thermostat. I'm sure toyota would have provided one if there was a requirement for the thermostat or if it effected the enine's performance/lifespan

your still completly missing the point here tho. a standard 4AGE 16v oil cooler setup IS NOT a full pressure system there fore it doesnt require the use of a thermostat because the sandwich plate uses a bypass method and bleeds the oil out to the cooler rather than channeling all the oil from the filter, to the cooler and back to the block.

im soooooo tempted to give you neg rep becuase your contribution to this thread is totally uselss and you are continually going away from the point with every post you make. read my original question and if you cannot make a true and accurate statement in regards to what im enquiring about then dont post!

**4agte** · 27-01-2006, 11:47 AM

Originally Posted by -GT-

As for the photos, i've taken some and spent 1.5 hrs trying to upload them but photobucket is being a bitch. I'll try again later...

cheers dude whenever you get a chance

**monkeymajik** · 27-01-2006, 12:48 PM

I think your 20v will be fine without an oil cooler.

If you are going to do a bit of track work (a few 5-6lap sessions back to back) then it would be advisable to fit one.

On a side note: Can someone recommend a good oil cooler? I have one of those 19row ebay/justjap ones and it appears to be leaking.

**-GT-** · 27-01-2006, 11:28 PM

Ok, i think dom, limbo, stu and i have pretty well covered the key points here in the last 10 or so posts...

I think the main thing to remember when considering factory setups is that many hours of research and development have been put into perfecting the setup used on each particular system. They have the luxury of testing and modifying, adjusting flow rates, cooler size, ducting etc until it all works like a, well, an oem one.

Different setups are used, examples that come to mind are the ae92 4age 16v bypass system, and the rx7 full flow setup, which i believe has a thermostat built into the core.

What we are discussing (and i have done) is very different to that; i have bought an aftermarket, off the shelf, generic sized system and matched it up to my engine and driving habits. I'm well aware that going to a 250hp rated, full flow system will mean to keep my oil up to temp when i'm meandering about town i need a thermostat.

As to recommendations for coolers/thermostats etc, see my earlier posts. I'm really happy with what i've got.

Speaking of which, i still can't seem to upload my photos. If you're getting impatient, go to www.perma-cool.com and picture a 10189 fitted snugly against my ac condensor behind the front bar of my sx, and a 1070 mounted inline just after the lines from the sandwich plate pass through the radiator support.

Besides, without me pulling the headlights, trim etc to get the bar off its not overly clear and pretty. I'll continue to butt my head against the photobucket wall for you lot, unless somebody wants to put their hand up to host and i'll email them?