Baldry1500 Posted July 27, 2011 Share Posted July 27, 2011 Hi,i recently switched to a high performance alternator from standard lucas and ever since my 1500 has started to overheat at the first sign of a queue. Is this a common feature? Any ideas on how to solve? Other than switching back to lucas alternator? Thanks in advance Link to comment Share on other sites More sharing options...
JohnD Posted July 27, 2011 Share Posted July 27, 2011 Baldry,Can't be the alternator, Baldry, but the same belt drives the water pump. Sure that it is tight enough? New belt? Stretched a bit? Are the alternator and pump pulleys the same V-section?JOhn Link to comment Share on other sites More sharing options...
Baldry1500 Posted July 27, 2011 Author Share Posted July 27, 2011 Belt is tight and the same v section. Thoughts were along the lines of higher voltage impacting the temp guage?either that or a freak of nature fix one thing and another breaks within 10 miles of the repair and you automatically assume the faults are related Link to comment Share on other sites More sharing options...
Ceaser Posted July 27, 2011 Share Posted July 27, 2011 The voltage will be the same on the new alternator its only the current that will of increased, when was the last time u changed the coolant?? Link to comment Share on other sites More sharing options...
Kyp Posted July 28, 2011 Share Posted July 28, 2011 Sounds more like genuine over heating than electrics to me, wouldn't you be getting strange readings when the engine was cold otherwise?I would be drawn towards the belt too. could it be too tight and have upset the water pump? Link to comment Share on other sites More sharing options...
Baldry1500 Posted July 28, 2011 Author Share Posted July 28, 2011 The more I think the more I fear the water pump is the cause, how can you check if it.s pumping?I also read about a plug on engine under rear carb think i'll flush full system and check nothing blocked. Link to comment Share on other sites More sharing options...
JSBulmer Posted July 28, 2011 Share Posted July 28, 2011 Might be out of my league here, but on my GT6 the overheating was caused by a faulty heater control valve that prevented the coolant from circulating.Would check the whole system in addition to the water pump.jb Link to comment Share on other sites More sharing options...
josok Posted July 28, 2011 Share Posted July 28, 2011 This sounds awfully familiar. One of my own faults, i changed the alternator, has to loosen one of the bracket bolts, which also fixes the water pump to the block, you can guess the rest? Forgot to retighten it and slowly lost coolant, high temperatures, lower whaen driving. I only discovered the loose bolt when i finally had to change the head gasket :B Link to comment Share on other sites More sharing options...
Baldry1500 Posted July 28, 2011 Author Share Posted July 28, 2011 Thanks for responses, am not loosing coolant so not a leak.just read something about gauge "top earthing" if I had a temperamental earth on the gauge or somewhere else would the needle move up to the red? Link to comment Share on other sites More sharing options...
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