Right now the coolant is all splashing out with the radiator cap off. Its an
interesting behavior, the level goes way down, then comes way up and splashes
out. If the cap is on when the engine gets warm it shoots out the overflow.
This car ('78 240D) has the bleed like you describe, the housing is marked 617.
-Curt
--- On Wed, 5/1/13, David Bruckmann <bruckma...@transcontinental.ca> wrote:
> From: David Bruckmann <bruckma...@transcontinental.ca>
> Subject: Re: [MBZ] Headgasket?
> To: mercedes@okiebenz.com
> Cc: "Curt Raymond" <curtlud...@yahoo.com>
> Date: Wednesday, May 1, 2013, 8:42 PM
> On 5/2/13, Curt Raymond wrote:
> >In playing with it I find I can put coolant it but it
> bubbles right out of the
> >neck of the radiator again.
>
> Cracked radiator neck perhaps? It might hold a vacuum but
> maybe not pressure...
>
> Also: not sure on the 616, but the early 617 engines had a
> bleed screw on the thermostat cover. If you don't bleed, the
> thermostat may not open properly. So if you have a leak and
> lots of air gets in you'll need to bleed the air trapped in
> the thermostat cover. And of course make sure you open the
> heater valve...
>
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