Austarion

Hey just wondering what thermostat housings people are using on remote thermostats? Cheers
Alex

Early front wheel drive corolla thermostat housing




This is the 90 degree pipe on the back of the head.

mine just has the stock vr4 housing monted in the same spot as above

no issues with it i just drilled a small hole in the thermostat to allow a bit of flow/any air to come through while closed

Can anyone let me know the diameter of their thermostat when open?

Ie, what diameter does the thermostat allow the fluid to flow?

The reason I ask is, I'm running my car with no thermostat, but I still need an in-line restrictor to slow the flow of fluid and allow pressure build-up in the block.

Cheers.

Lummy

I made one up out of 2 sigma out lets just machined one with a small counter bore for the thermostat to fit into and bolted them together

note you need to drill a small hole in the flange of the thermostat around 4 - 5 mm so some coolant will still flow or the thermo doesnt open till after the engine gets quite hot

yea thats what i did with mine, didnt have any issues
ill try take a pic of my piping as its out of the car at the mo

Cheers guys the corolla one looks good, I'm running the same setup out of the back of the vr4 head just used steampipe 90's, off to the wrecker I guess
cheers

siggy_gsr wrote:Cheers guys the corolla one looks good, I'm running the same setup out of the back of the vr4 head just used steampipe 90's, off to the wrecker I guess
cheers

Im using a N/A twin cam Galant thermostat housing (heaps of them in NZ) mounted next to the throttle body. And a home made elbow out of the back of the head.
Ive got a hose coming from the bottom of the thermostat housing that goes to the factory metal pipe that the heater uses and then goes back to the water pump. So the warm water circulates from the back of the thermostat to the water pump.
It works very well. It warms up fast and the raditor fan only comes on when Im sitting in traffic.

Show Image:

Show Image:

That's a neat engine bay JAS!!

My only concern with a setup like that is, you really shouldn't run a flexible pipe prior to a thermostat - the pressure difference between pre and post thermostat can be significant at high RPM and it's far more likely that a flexible pipe (or the hose clamps) will fail. Ideally, the thermostat should be as close to the head as possible, keeping all the high-pressure fluid in the head/block only (between the water pump and the thermostat).

Obviously with these TC's in Starions or Scorpions, it's quite difficult to do this.

I still haven't come up with a plan of attack for mine - at present I'm not running any thermostat, which is far from ideal.

my setup is basically identicl to JAS one except my heater was leaking so i bypassed it

one thing i did notice is that when doing big burnouts it would get up in the temps quite quickly possibly because my recirc hose was rather large
which meant a decent amount of water wasnt getting cooled before re entering the block

no issues any other time tho even heavy traffic

Lummy wrote:That's a neat engine bay JAS!!

My only concern with a setup like that is, you really shouldn't run a flexible pipe prior to a thermostat - the pressure difference between pre and post thermostat can be significant at high RPM and it's far more likely that a flexible pipe (or the hose clamps) will fail. Ideally, the thermostat should be as close to the head as possible, keeping all the high-pressure fluid in the head/block only (between the water pump and the thermostat).

Thanks!

The pipe that goes between the thermostat housing and the elbow is mostly metal. Theres only rubber hose where it bends 90 deg from the elbow to the rest of it. Ill see if Ive got another pic showing the metal pipe.

JAS wrote: Show Image:

What are the outlets on the back of the rocker cover? Some sort of PCV setup, like a SOHC one but done for both sections of the DOHC head??

enthuzed wrote: What are the outlets on the back of the rocker cover? Some sort of PCV setup, like a SOHC one but done for both sections of the DOHC head??

They go to my Oil/ air separator. Instead of having a PVC setup. Ive got two big ones cause the 4G's like to beather better with forged pistons.

Thort so JAS. Was their engine pics up of your finished artwork?

enthuzed wrote: Was their engine pics up of your finished artwork?

No dont think Ive put some good engine bay pics up yet. So heres two Ive just taken.
Not thats its finished yet...

Show Image:

Show Image: