Ian:
If your radiator is boiling over, then a new radiator cap will help,
or perhaps a higher pressure than stock cap. If the radiator is not boiling
over then the cap will not help, so then other things to check are:
1. Condition of the coolant. It should be free from rusty stuff, and
be a 50/50 mix of antifreeze and water. Make sure it is topped up adequately.
2. Ignition advance - set the timing with the vacuum line
disconnected. 10 BTDC.
3. Mixture. Pull your spark plugs - they should be a grayish brown,
the color of corrugated cardboard. Adjust your mixture as needed to get the
correct color.
4. Water pump belt. It should not be loose or tattered.
5. Sender/gauge. Disconnect the wire to the sender. The temp gauge
should slowly fall to "C". Connect the sender wire to ground. The gauge should
read full scale after a few seconds. if either of these fail, replace the
gauge.
6. Radiator shroud. Make sure your shroud is present and in good
condition.
If none of these locate the problem, check your compression in all
cylinders. A blown head gasket will often cause overheating. If your
compression is low in one or more cylinders, check again after adding a squirt
of oil to the low cylinders. If it is still low, suspect your head gasket.
If compression is good, then it may be time to have your radiator
boiled out
Vance Navarrette
Cogito Ergo Zoom
I think, therefore I go fast
-----Original Message-----
From: 6pack-bounces@autox.team.net [mailto:6pack-bounces@autox.team.net] On
Behalf Of Ian Breyer
Sent: Monday, February 16, 2009 12:08 PM
To: 6pack@autox.team.net
Subject: [6pack] RADIATOR CAP PSI
Hi all.
Does anyone know what the proper PSI for the radiator cap for an early 72TR6
is? TRF and Moss have conflicting information. TRF says 7PSI thru 1972. Moss
says 13PSI for 1972 - 1976. The car has been running hot and a new thermostat
didn't fix it so I'm giving a new cap a shot before thinking about the
radiator. Thanks as always.
Ian
72TR6 Jasmin Yellow
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