[W126 Coupe] Coolant Leak

[Steve Nervig]

On Jan 29, 2006, at 12:40 PM, Mike R. wrote:

> I have a coolant leak that I can’t find. The anti-freeze drips off  
> the passengers side of the engine, up front but there isn’t  
> anything obvious for the source. The water pump weep hole is dry  
> and as far as I can see, even with an mirror, there isn’t any  
> leakage from it the water pump/motor gasket. I’ve looked at the  
> thermostat housing as well as the upper and lower radiator hose  
> connections, but nothing there either. I looked under the intake  
> manifold just a little (place on the passenger side in front of the  
> front intake runner), but no puddles under there either.
>
>
>
> I tried some air pressure in the system through the overflow tank  
> and did make it drip a little faster, but nothing apparent for a  
> source. I drove the car and that seems to have slowed down the  
> leak. Went out to a restaurant last night and back, nothing on the  
> ground under the car at the restaurant or my garage this morning.  
> Self healing leaking? Any ideas where to look??
>
>
>
> There is a hose, ~1”, that starts somewhere near the water pump  
> and  goes toward the back of the engine compartment over the air  
> pump – what’s that for?? Nothing apparent from it but I couldn’t  
> see where it attached on the front of the motor.
>
>
>
> Thanks,
>
> Mike R.
Mike, one trick I've heard about is to put powder, like baby powder  
or cornstarch, everywhere (externally of course) where you think it  
might be leaking. Do this on a clean, dry engine. Once the coolant  
starts leaking, you'll be able to trace its mark back to its source.

Regards,
Steve
--
If you don't know where you're going,
any road will do.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.pairlist.net/pipermail/mbcoupes/attachments/20060129/47c8ce64/attachment.htm