Kevin,

Have your mechanic repeat that test with his emissions sniffer, either
running or cranking like before.  If he gets a high HC reading your head
gasket(s) has failed.

Kevin O'Brien wrote:

...he removed the
Expansion Tank cap...pulled the coil off the rotor and
had his assistant turn the engine over.  Bubbles could
be seen in the Expansion Tank as the engine cranked.
He says that's a sure sign...bad Head Gaskets or
cracked head.

Is he correct? Any and all input appreciated.

Stuart MacMillan
'84 Westy w/2.1