[6pack] Hot Running 6

[Sally or Dick Taylor]

Glenn---Use a candy thermometer to get a better coolant reading. Place it at the top of the open radiator, and run the engine. This should also burp out any air, after the thermostat opens up. 

The one deg. BTDC ignition timing could well be another source of excess engine heat. I'd move it up to at least 12 deg. BTDC, with the engine idling as close to 800rpm. (Any increase from this speed will activate the centrifugal advance and give a false reading).

Lastly, the temperature you are reading is not necessarily a bad thing, but it can cause one to be always watching the gauge!

Dick


-----Original Message-----
From: Glenn Franco
Sent: Saturday, June 18, 2011 3:15 PM
To: Friends of triumph, 6pack at autox.team.net
Subject: [6pack] Hot Running 6

Hi
I just finished rebuilding a club members 74 TR6 that I had bored .060" 
over due to cylinder wall damage.
The owner had the radiator cleaned out, provided a new water pump, 
thermostat, temp sending unit and so on.
The car has a set of DGV Webers (downdraft) on it.
There are a couple of issues now with the engine I'm trying to sort out.

Engine runs on the warm side with the gauge between 1/2 and 3/4 some 
excursions to 3/4 when left idling for a _long_ time. When the engine is 
revved to 1,500-2,000 rpm it settles back down to 5/8ths on the gauge.

        * I suspected a faulty replacement temp sending unit and
          replaced it with one from my car and it brought the temp down
          slightly.
        * I also tried to burp the system by bleeding the air out at the
          sending unit but I can't seem to get it out. When I remove the
          sending unit there's just air.
        * Any better methods of getting air out of the head?? Doesn't
          seem to purge after thermal cycling the engine. New cap as well.
        * The replacement thermostat was a 165 deg. I suspect that it's
          higher than that. Can't measure actual coolant temp since I
          broke my Temp Tester.
        * My next step is to remove the thermostat.

Engine backfires through the carbs cold when when snapping the throttle 
when the chokes are off and not quite warmed up. Not a problem at 
operating temp/No backfires.

        * Distributor is the vacuum retard type and the vacuum line is
          disconnected.
        * Base timing set at ~1deg BTDC

Any Ideas?
Thanks in Advance
Glenn Franco
Too Many TR's they keep multiplying

________________________________________

6pack at autox.team.net

Donate: http://www.team.net/donate.html
Archive: http://www.team.net/archive
Forums: http://www.team.net/forums
Unsubscribe: http://autox.team.net/mailman/options/6pack/tr6taylor@webtv.net