Hey!,
I just got my 1990 TII running. it has a rebuilt motor with the stock (extremely worn out / screwed) turbo, and I'm using a Haltech E6K to control everything. Driving around town (like a grandma -- breaking in the motor) the temperatures stay around 200 - 210 degrees F. Why are the temperatures so high?! The intake temperatures also get up to close to 150 degrees F without getting into any boost.

The only reason i can think of for the hot running is that the undertray is still off the car as are the plastic panels in front of the radiator (next to the coolant overflow bottle).

I'm concerned because I'm getting a FMIC soon, and this is probably going to raise temperatures even more!

Help!,
Manolis

 

did you bleed your cooling system? maybe theres air in it

 

get those panels in!! thats enough to drop it 10-20F

 

do you have an Electric Fan?

You have water in the cooling system??? Air in the cooling system?

 

it's running the stock fan and shroud. The cooling system should be ok I believe -- I just filled up the radiator and the put some in the overflow tank -- does that sound OK?

i'm going to go out now and put the panels back in and drive it for a bit to get some gas -- i'll see what happens with the temperatures.

thanks,
Manolis

 

Manolis- you might have some air in your cooling system. Warm up the car and bleed it off by loosening the bleed off screw on the radiator.

 

sounds like you have something restricting airflow into the engine bay, your intake temps shouldn't be that high.

 

the car is an S5 TII (1990), so there's no bleed screw unfortunately. Can I just loosen the radiator cap (when cold of course) at idle and let it bubble? -- will that work?)

HWO - My turbo is really shot right now (you can hear the turbine hitting the housing on every exhaust pulse @ idle i believe...) -- could that have anything to do with the high intake temps? Also, the intake is right down near the turbo inlet right now; i should have that fixed by tomorrow hopefully.

Would the high intake temps affect the coolant temperatures much?

Thanks,
Manolis

PS - thanks for the hint on the plastic scott; I put just the underbody tray on last night at 1:00AM and went for a 24 mile drive, during which temps were always under 202 F (about a 10 degree improvement, like you said ). Granted it was cooler last night, but that was a big improvement.

 

Could it be from all the horsepower from the engine? Nope. Its just a cooling problem. Running the stock fan and shroud, aside from the aforementioned above, I would also check your fan clutch.
Also, check for hot spots in the rad. Maybe its clogged....

Also, get your plastic panel back on. It helps big time.

 

What about ignition timing? That will cause overheating if it is off too much.

 

With an E6K, we're assuming he's got it professionally tuned and running properly, and measured the EGT's, so ignition shouldn't be an issue.

Its not an issue, is it piston eater? Who did the install and tuning?

 

Hello. I am posting this for Manolis as he is outside right now tinkering.

He installed the Haltech himself, built a removable wiring harness that mimics the stock one, and got a map from Hitman's website. He wanted to know if he should post the current map for you guys to take a look at, see if you can tell if anything is up with that.

 

Hmm... I just finished checking the ignition timing (dead on as far as I can tell), and I put all the plastic back in the car. End result: still too hot

I'm going to run down to Crazydude's house later today and pick up his gutted thermostat to see if that is what's causing the problem.

Thanks,
Manolis

 

I've put a TurboII into the rear end of my kitcar(Kelmark GT). I had some very bad heating problems and did a couple of things. You must leave the stock mazda thermostat in as it has a little round block off for the hole that recirculates water back into the engine before it opens. I took and drilled small holes around the outside of the thermostat so that some water is always passing by it(engine in rear, radiator in front) I also bled a lot of air out of my system.
I also ran ducting to my radiator and intake, but you have it in front. My temps are great (185-195), unless I get boost, than the temps start to rise. my intercooler is in the rear, beside the engine and I'm going to modify it for better cooling later.(I also have a E6K, run hitman maps and my intercooler temps are way to high at boost.)
Just a side note. If your turbo is making a metal/ rubbing sound could it be also possible you might be sending metal particles into your engine?(I'm no expert, but I do work on marine diesel engines up to 5000hp and we take the clearance readings on our turbos religiously!) If your turbo is dragging and not turning freely it might be getting very hot because its not passing gas freely. I don't know if this would transfer heat over to the intake side on the turbo on the mazda, but on our large diesels its a major concern.
Have you tried waterwetter from your local parts store?(every little bit helps!) Also a large electric fan on the radiator would seem to me to be a very good add on.