When I had a cracked head on my '84 I was getting bubbles into the
pressure tank with a good cap.  New head old cap fixed the problem.

Mike

Edward Maglott wrote:
> That's weird you are getting bubbles in the overflow tank.  That
> would mean the pressure cap on the coolant tank is releasing.  Could
> it just need a new cap?
> Edward
>
> At 09:13 PM 1/16/2008, John Runberg wrote:
>> Slowly have been playing w/ a 90 GL that's had a shload of issues.
>> We're down to "hobby" status on this one as no-one in their right
>> mind would keep fixing things :)
>>
>> Back-story:
>> Have replaces a series of failed parts located by observation
>> (coolant leaking, etc...) - radiator, some hoses new and some
>> reattached, main coolant and overflow tanks + sensor.
>>
>> Situation:
>> Consistently have been getting air into a properly bled system (by
>> list procedure, Bently, two separate specialty shops). Has had
>> pressure test done & system holds pressure with no leaks visible -
>> HOWEVER smell says there *might* be a small leak @ rear heater core
>> (have not dug in quite yet). Amount of air can be several seconds
>> when front bleeder is opened after a 10m drive.
>>
>> Latest:
>> Noticed steady stream of air bubbles in overflow tank (behind
>> license plate) yesterday. At idle, 2-3 bubbles per second. This is
>> on a (nasty engine rebuilder) engine installed by PPO perhaps 30k ago.
>>
>> Opinions?
>>
>> As mentioned, we're into hobby status here. $$$ will be spent first
>> restoring the Westy, but hate to drop the investment in this
>> bottomless pit :) so keep pluggin on. Heads? Reseal or replace? Pull
>> 'em and find out? Have talked to Hans and Karl about engine
>> conversions, but just want to locate this prob first.
>>
>> thanks,
>>
>> john
>