<html><div><br>Hi Bert,</div><div> My approach would be to disconnect hoses to the heater at valve and at the pipe on other side, then to run water from a garden hose through the heater. It should flow freely, possibly bringing a surprising amount of sludge along. Then put the hose to radiator, with the valve open, and check that water flows through the valve. </div><div> This will dilute the antifreeze mix--remember to correct it for winter season.</div><div> If water flows in these tests, try starting engine to see if the water pump pumps. You can run a minute or so, plenty long to test this, with coolant level low.</div><div>Bob</div><div><br>---------- Original Message ----------<br>From: Bert Palte via Mgs <mgs@autox.team.net><br>To: mgs@autox.team.net<br>Subject: [Mgs] MGB Heater not working<br>Date: Mon, 18 Apr 2016 10:43:25 +0200<br><br>Well fellow listers, I haven't seen any messages here for a long time, <br>so here we go.<br><br>I rebuilt my heater some time ago because of a leaking core.<br>Not a very easy job, BTW.<br><br>The heater has been functioning correctly for some time, but now I can't <br>seem to get it working any more.<br>What could be the problem?<br><br>Apart from the core, I also changed the heater valve and the fan. The <br>fan is still working.<br><br>The car is a 1970 B Roadster.<br><br>TIA<br><br>Bert<br>_______________________________________________<br><br>Mgs@autox.team.net<br>Donate: http://www.team.net/donate.html<br>Suggested annual donation $12.75<br>Archive: http://www.team.net/archive<br>Forums: http://www.team.net/forums<br>Unsubscribe: http://autox.team.net/mailman/options/mgs/mgbob@juno.com</p></html>