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