I dropped an LT1 in my RX7 and need to know a couple things. On th back of the heads are water lines. They go from one head to the other then to the TB. Where does it go after the TB? Does it just go strait to a coolant supply?

Here's my situation. My engine is sitting higher than my radiator. This is prone to waterlock and that's no good. Is there a way I can go from the back of the passenger head, get that line and instead of going to the TB have it go to an expansion tank. Then from there to the radiator?? This will cure any air in the system but I just don't know if anyone has done this. I'm assuming it's just a regular water line

 

Isnt it cheaper to get the hoses with the air bleeds like the LT1 in a Camaro does Have? You could place the hose in the back sitting higher than the engine (just as the LT1) and just bleed the air out.


Just my opinion

 

that would work but you have to remember that my radiator is lower than the heads. So how would I fill coolant up to the top?

 

Yeah same as my LT1. The radiator is actually sittin lower than the air bleeds... what you do is fill the radiator up, put the rad cap on... turn the car on, when the car is warmed up you bleed the air out. this will take two or three warm up cycles. Just the same as my 95Z28. the air will all come out. Check the Coolant change procedures for the Camaro with the LT1. That will do the trick.

The only problem I see with the air bleeds or the expansion can is that .....if you get an air pocket stuck inside the heads Its gunna be difficult to get rid of it not matter what.

Marvin

 

Oh I forgot... the way this system works is that the coolant expands when hot... you bleed the air out then when the engine cools down the decrompression of the coolant inside the sealed system creates a vacum and its this vacum that sucks more coolant from the overfill reservoir pass the radiator cap and into the radiator itself where it will remain sealed inn. You will need a radiator cap that lets coolant back in from the overfill reservoir.

I think all the rad caps do that anyways. The coolant wont flow out of the radiator until it reaches the test pressure of the rad cap and when the engine cools off it will suck the coolant back in again. It works the same on the camaro.


Marvin

 

Hum, I guess that would work. Probably going to take a few times cause my radiator is pretty low. The bleeder you're talking about, is it the one on the thermostat housing? I wonder cause that doesn't seem like it's higher than the heads

 

Doesn't need to be a ton higher on a LT-1 due to the fact it's a sealed system. Using a sealed system, you basically have the water pressure in the system forcing the air out the hole.
Now, on the rx, it may be different due to the fact you might have some different routing. There are companies that make necks that fit in line of your main hoses if thats the case. You would just have to get it higher than the heads. And that may not be easy on an RX. I'm just gonna blow rotary after rotary...lol

-Shannon

 

www.torquecentral.com has a conversion page for the rx's, you might wanna post up on there also.

-Shannon

 

OK the main question is your expantion tank pressurized? Does it have the Radiator pressure cap on it? If so yes that is a good place to run it

If not you need to run it back to the rad. It will bleed most of the air out through that tube BTW Once you bleed the pump you should be set. I always drill a 1.8 inch hold in hte T-Stat to make sure air gets out through the pump bleed(bleed on T-Stat housing. this make sure water is getting through and will operate the T-stat and not air lock the motor. then I start it and keep filling to get steady stream of Coolant through that tube. On an LT1 it is right by the Rad. cap so you can see it

Good luck!