Hi everyone, as some of you know im in the process of fitting a ej22 into my 85 caravelle which is going well and hopefully the motor will be bolted in next weekend.
I was told by a mechanic to remove the little valve thing from my thermostat and enlarge the hole a bit. Ive herd about this before but im unsure if i need to do it for mine, and if i do im unsure exactly how much i should enlarge the hole by? Any advice would be great,
Thanks,
Alex.

Is your mechanic a Subaru powertrain engineer? Might be an idea to leave it as Subaru intended for now...

Tell him to stop loking down the eye of his dick & tell him its a Subaru & not a ford XF

because the engine and radiator are much further apart then in a subaru I drilled 3 2mm holes in the thermostat to decrease the drop in temperature once the radiator is used and it seems to work pretty good

big big discussion on that here...

http://forums.aussieveedubbers.com/viewtopic.php?tid=61265 

lol... I was hoping you'd chime in, Pete!

just so you know. I know have the stocker 85deg one in place. NO extra holes. Flipper valve still in place. Keeps the engine nicely warm without getting hot from what I can see. And subaru designed that way...

I gave it a try with a 3 mm hole. And I would not do it!
The only thing it did, was that it took three times as long to get the engine up to it´s operating temps. I use a stock thermostat without a hole.

Thanks for the advice everyone, gona leave it standard for now with no hole and see how it goes. If i want to try a hole its not hard to pull the thermostat out and put one in.

I have not run a thermostat for about 1 1/2 years.......whoops!:duh

Thought I had one until I checked the other day.

I hope you have super thin oil.

Pete,

Going to Suby today with your part no. for a thermostat

Quote:

Originally posted by pete wood I hope you have super thin oil.

Good man,

I hope enjoy bleeding the cooling system up.

Dunno what happened to my post yesterday.

Use the thermostat as is

Use a flow through header tank. Mine's just connected between the H2O manifold and the matrix lines - works a charm on the bleeding. I had a single feed from the bottom of the tank before and it gave me slight problems
(forgot to look at where you are, mine's from a UK Vauxhall Fronteria)

In Helbus' thread he's used flow through (custom made) between the main water outlet and rad

HTH

Just make sure that your bypass hose is connected correctly from the outlet manifold to the nipple on the thermostat housing. That provides the signal to open the thermostat. A hole in the thermostat will actually delay warmup by forcing the engine to warm up all of the coolant rather than just the coolant in the engine.

If you're running a big heater like the Canadian Vanagon folks there is a bypass mod to keep the engine cool while the heater is running.