Moe Greene

iTrader: (2)

Hi guys,

I just finished my rebuild and noticed that coolant is coming out of my tubros

The coolant is literally inside my turbo exhaust housing, it's so bad that coolant is shooting out of my exhaust

Not sure whats going on, everytime I go to crank the car coolant just pours out of the turbos....

Can the issue be the turbos? They are brand new BNR stage 3 turbos which makes me think they may not be the culprit.

Any help is much appreciated!

Moe Greene

iTrader: (2)

Just noticed this, could this have caused any sort of damage? How would coolant end up in my turbos?

****My spark plugs came out wet with coolant*****

Redbul

iTrader: (26)

Hi MOe:


It may be a wild guess, but there is a hose that runs from just under you oil filler cap to the air pipe connector elbow just after/in front of your front turbo. It is supposed to recycle fumes from your crankcase. The hose runs generally in the direction of that coolant hose in your picture. It would be crazy that somehow the coolant hose has been routed back to the elbow.


Otherwise you may have a crack in your turbo manifold letting coolant into the turbo chamber.


If so, I pray for you.

Ceylon

iTrader: (3)

That's quite a normal mod to do, it bypasses the thermowax in the throttle body.

If the coolant is inside the exhaust and on the spark plugs I imagine it's an issue with the seating of the new coolant seals in the engine perhaps?

DaleClark

iTrader: (55)

First off, the coolant that goes to the turbos goes into a sealed water jacket inside the turbos then back into the engine. There is NO WAY NO HOW the coolant in the turbos can get into the turbo intake side or oil side, or the engine.

If you are getting coolant into the engine, you either have a coolant hose hooked up REALLY wrong or a bad water seal in the engine. That's not uncommon in new engines, if the seal pops out of its groove and gets pinched by another housing, there you go.

Dale

Moe Greene

iTrader: (2)

Would just cranking the engine, not actually starting it, cause coolant to spill into turbo and out of the spark plug holes?

Moe Greene

iTrader: (2)

Anyway I can test to see if my water seal is bad?

I was very diligent when putting my engine together, I really made sure to get the water seals in perfectly.
Also when I went to crank the engine this morning less water was shooting out of the spark plug holes, and as soon as I topped off the coolant and went to crank the engine it started to spew out a lot of coolant from the spark plug holes.

Redbul

iTrader: (26)

Is there evidence of coolant in your air pipes to the intercooler and from it to the throttle body?

Redbul

iTrader: (26)

What's hooked up to those two nipples?

Moe Greene

iTrader: (2)

I have vacuum lines hooked up to those, I checked and that inlet pipe and the vacuum lines are dry.

Redbul

iTrader: (26)

I believe one of those lines should be the fume purge line from the oil filler cap. But you likely mean that. So no coolant in the intake system from the turbo, eh.


My friend recently took several old turbos apart and remarked that he had seen internal cracking in one of them. That prompted my comment. However, Dale seems quite adamant that there could not be a leak from the water jacket.


If there is a bent water seal would you see exhaust blowing back into your coolant? Or will your car not even run?

Moe Greene

iTrader: (2)

Car will not turn on, I have yet to turn this car on since the spark plugs get so wet.

bajaman

Well...yeah. I mean jeebus man! You've got coolant in the turbos, in the engine, shooting out the spark plugs and exhaust...SOMETHING IS TOTALLY FUCKED, not to put too little emphasis on it.


You describe just cranking the car as totally flooding it with coolant, right? There are so few revolutions being turned in that scenario that it proves coolant is literally POURING into the engine with very little effort.


I feel for you, man...it's a helluva lot of work to do these rebuilds/installs.

KompressorLOgic

iTrader: (6)

Geez you need to find out where its all coming from. Take the turbos off completely and block off loop the coolant line. Rent a coolant pressure tester and try to pressurize the system. If it holds pressure than it was your turbos. If it still bleeds coolant in,take the uim off if it's not leaking there or amywhere external to the block then its the engine.

Redbul

iTrader: (26)

That throttle body coolant line partially pumps coolant through the throttle body, does it not? Perhaps block the line off on either side of the throttle body.

Redbul

iTrader: (26)

The coolant enters the throttle body from below and passes through chambers in the throttle body and out through an attachment that contains a thermo pellet. I believe this thermo pellet reacts to the coolant heat and moves a lever that can affect the throttle axle rotation. If the gasket (black area first picture) between the thermo pellet and the throttle body leaks, could it push coolant through the axle into the throttle opening ? (seems unlikely)


There also seems to be a brass plug that may connect to the chambers the coolant passes through the throttle body (black dot second picture).

What is that brass plug there for? To protect the throttle body from freezing coolant? Was your car ever in extreme cold for a prolonged period?

Moe Greene

iTrader: (2)

I found out the problem, my side seal got jammed between the center iron and front housing. Check out the thread I made about it, I posted photos.

https://www.rx7club.com/3rd-generati...o-now-1118684/