Started the car up tonight just to let it warm up, warmed up slow. Once the car was warm some coolant vapor came form behind the intake manifold. So i shut the car off.
Whats the deal with this? My water temp gauge said 165F. Just to make sure its not seriously off this is where the sender is mounted. Had the a/c on low so both fans where going.


Its on the T-stat housing shown here.

So are my temp readings ok?
Where's the vapor coming from turbo coolant lines? TB lines?

 

Your temps are good. And yes it sounds like your TB coolant line is the problem. Have you pulled the UIM to check it out yet?

 

Actually there are other possibilities----heater hose on firewall.cooling water line to throttle body etc.you just have to check one at a time

 

From the picture it looks like you are referring to under the crossover pipe. The other side of the throttle body coolant line is there. Small rubber hose behind the alternator. Check that. There are no soft heater hoses across the firewall. It is a hard line. The only soft heater hoses are on the ends. Could also be the turbo coolant hoses as coolant dripping on the hot turbos would make a mist/smoke.

 

FWIW, having the sensor mounted in that location, I think you have to wait for the T-stat to open before getting good readings. Not the best location IMO.
If you have to replace the TB coolant line anyway, you might consider moving it. Instant and accurate readings.
---> https://www.rx7club.com/showthread.p...ghlight=sender

 

Alright, i didn't sleep good last night thinking the motor possibly blown a coolant seal.
Well it looks like i'm going to have to cancel my dyno tune on monday. I have to replace my twins and the turbo,heater and TB lines and move that sensor to the TB coolant line. -_-

 

You have plenty of time to get that stuff done by monday. BTW why are you replacing thw twins? IMHO all you just need to do is pull the UIM and check your coolant lines If it is your tb coolant line go to a parts store and get some straight coolant hose replace it. That will hold you over untill you can replace it with the proper molded peice from Ray @ malloy.

Your semptoms don't sound anything likea coolant seal problem. That would be an internal leak( and the coolant would be coming out ofthe exhaust)

Your problem "SEEMS" more you have a coolant line with a crack or pinhole leak. Andby your description i would check the tb line first. But all the lines should be checked/replaced to be on the safe side.

I will be switching from regular coolant to Evans before I take my car to get tuned, and i'll be replacing ALL ofthe coolant lines too. Just my$.02 hope it helps.

Good luck!

 

I have to replace my twins because they're pushing oil into the intake tract, which is clearly coming out of my BOV with a nice grease puddle on my intake lol.

Also theres coolant that overflowed under the passenger side, is that ok too? i'm worried this motor is super fresh so i dont want to ruin it.

 

IF you are talking about the coolant coming out ofthe recovery tank under the pass headlight, then you MAY have a problem. Start with checking/replacing all of your coolant lines inspect the line going to your recovery tank "VERY" carefully, Better yet just replace that one with a new one. Also you will want to replace both coolant caps. Start there and get back to us with an update.

 

Turbos went bad pushing oil into the intake. Also causing them not to cool taxing the coolant. Picked up new twins today. I went to AZRR and talked to Glen, he looked at the car the day i bought it and gave the motor a clean bill of health, theres no smoke out the tailpipe so no blown motor. I hope anyways. When i topped off the coolant, (the only time i had to) i also poured a little into the recovery tank so maybe it just sloshed out or something, who knows.

 

I created a thread with pics of when the throttle body coolant line broke on my car. That hose is a pita to replace...

You sound pretty paranoid overall. Pretty much all twins blow oil into the intake. Mine have been doing it for a number of years. Oil in the intake has nothing to do with the performance of your cooling system.

At some point you may want to do a cooling system pressure test to test what other locations you may be leaking coolant from. If your coolant hoses are original, you may be surprised by the results. I replaced all of my hoses and hose clamps with OEM parts. Ray discounts them when packaged together.

 

Hoses where all just replaced motor has about 1k on it Arizona Rotary Rockets aggressive streetport rebuild with new housings, lapped irons etc. This motor is robust as hell. When i mean oil into the intake i mean a lot, not the usual small amount, theres a puddle in front of the BOV heh.

I also purchased low mileage twins from Glen at AZRR and he hooked me up with all the gaskets for the swap. so W00t i guess.

 

An oil catch can will help get rid of the oil in the intake.

 

I doubt that the turbos taxed the coolant. That would mean the entire cooling system would have had to overheat. I can't imagine the turbos generating that much heat unless without seizing. Sounds to me like you just have a pinhole in a hose somewhere.

 

Thanks for all the re-assurance guys, stepping from an FC to an FD is a big expensive step for me and i appreciate the help.

 

Either the smoke was coming from an overfilled recovery tank (my fault) or the oil leaking inside AND outside the rear turbo >_>, started turbo removal tonight, canceling my dyno tune in the morning.