BC

Have a 928 (32V) here that blew the ubiquitous heater hose. The short one.

At about 90mph, after accelerating from a stop, on the highway, the coolant smell came, the car stopped, and the coolant came out - all basically at once.

The car would not restart immediately following this event, but starts fine 30 min later and continues to seem fine.

All that coolant coming out of one place, leads me to believe it disturbed the crank sensor enough to stop the engine. What do you think?

I'm going home from work to investigate, and change the timing belt and tensioner, but I wanted to see if anyone here had more places to look.

FredR

The only way it could have been the crank sensor would be if the one installed has well degraded insulation somewhere I would suggest.

Hopefully you were able to shut the engine down before any serious overheating occurred.

Regards

Fred

PorKen

If you haven't already, check/replace the heater valve.

Also check that the steel tube is still epoxied properly into the aluminum piece which bolts to the head.


In short succession, I had the short hose, the heater valve, then the tube blow out during WOT runs.

After refilling with coolant each time, of course.

BC

Yes, not that the final arbiter is the gauge, it never even had a CHANCE to get hot. There is probably still some coolant in the engine, just not in the core and the reservoir. I'm going to change it all to the mercedes red coolant everyone likes.

The engine shut down abruptly on its own.

What I am confused about is why it shut down and why it wouldn't start back up right away.



I will check these things, thanks.

Rob Edwards

What year 32V? 5-speed or auto?

Sounds like gamey insulation on the CPS wire (?) Or gamey insulation on something else at the rear of the valley that got wet and gave up the ghost till it dried out.

BC

S4 auto. Its a quite strong one too. Can't wait for Porken's S4 chip.

FredR

The trouble with these cars is that the wiring looms are getting very old and decrepit and whilst they are dry can function OK'ish. Get them wet suddenly with a pressurised spray of hot water/steam and possibly a whole different ball game until it all dries out.

If you lose the CPS signal then not much will happen. Hopefully you will make a quick recovery.

Regards

Fred

Mrmerlin

BC you might flip the lid on the CE panel and see if coolant has gotten into the panel,it could run into the grommet and or down the main wire harness
also the CPS sounds suspect , possibly due to age
do you know if the intake has been refreshed?
have the grounds been cleaned at the rear of the valley?

outbackgeorgia

When the epoxied tube spit itself from the housing, coolant did cover the rear of the engine, but mine did not stop. Did not Have time to overheat, as I shut down quickly. I would check the CPS connector, which I had already replaced. If you have not, it is probably crumbly plastic, and will fail soon anyway.
I replaced the tube with a one piece part from 928 Intl.
Dave

BC

Tube and housing are fine. Short hose split the long way.