Paul H Posted August 14, 2019 Report Share Posted August 14, 2019 Hi flushed my system, removed bottom hose and bleeder valve on the engine . Water did drip out over night from the block valve. I did try to remove the nut holding the bleeder valve to no avail. Now refilling with distilled waster and antifreeze at 35% , handbook says 6.2 litres in total . currently have approx 4 litres and its full. Started the engine with heater controls on . I have hot hoses at the heater section and bottom hose but still cold on the top hose . Assuming there is no trapped water in the block I’m hoping to clear the airlock by running the engine with top hose loose or off until air lock clears Am I missing anything ? Paul Link to comment Share on other sites More sharing options...
JohnD Posted August 14, 2019 Report Share Posted August 14, 2019 Your thermostat hasn't opened yet - or is stuck. Hot coolant comes out of the head and is pumped up towards the 'stat. The take-off to the inlet manifold warming tube comes off below the stat, so it circulates through there anyway. If the heater is on then it goes to the heater matrix, back to the valve and then to the water pump via the pipe under the exhaut manifold. It's a separate circulation. John 1 Link to comment Share on other sites More sharing options...
Nick Jones Posted August 14, 2019 Report Share Posted August 14, 2019 John is probably right - and as a further wrinkle, if your thermostat seals well and has no air relief hole in it, it may itself be sitting in a pocket of air and not getting enough heat into it to actually open. Try bleeding by removing the hose that goes from the water pump housing to inlet manifold. Nick 1 Link to comment Share on other sites More sharing options...
Pete Lewis Posted August 14, 2019 Report Share Posted August 14, 2019 I always open the top heater hose just enough to let any air out with engine running . If the stat doesn't have the jiggle pin drill a 3mm hole in the support disc. To let air out when filling Pete 1 Link to comment Share on other sites More sharing options...
Peter Truman Posted August 14, 2019 Report Share Posted August 14, 2019 My solution to bleeding the heater high point on a Vitesse Mk2, copied from a Renault 8 Gordini I had in Montreal in the late 60's. I always thought what a good idea it was, its just a Yorkshie T with soldered in brass nut in the vertical offtake. Yes it works. PeterT 1 1 Link to comment Share on other sites More sharing options...
Paul H Posted August 15, 2019 Author Report Share Posted August 15, 2019 Update: I ran the engine up to temp and the thermostat kicked in and the top hose is now warm , I checked carefully and removing the top hose while running there is a flow of water . The rad is still full despite me only putting in approx 4 litres and the book says 6 litres . Is it possible I left 2 litres in the block ? Both heater hoses are hot . Would giving the car a run remove any possible airlocks if this is still the case ? Paul Link to comment Share on other sites More sharing options...
Pete Lewis Posted August 15, 2019 Report Share Posted August 15, 2019 yes a run will either work or disappear in a cloud of steam refills are never as the book quantity i wouldnt worry too much pete 1 Link to comment Share on other sites More sharing options...
Paul H Posted August 15, 2019 Author Report Share Posted August 15, 2019 Hi Pete went for short run and water levels are the same . Thermostat went crazy for a couple of seconds then went straight back to 80 to 90 range . Guess that might have been a case of trapped wind 😎 Paul Link to comment Share on other sites More sharing options...
Pete Lewis Posted August 15, 2019 Report Share Posted August 15, 2019 think we all have that problem pleases its seems ok Link to comment Share on other sites More sharing options...
Gully Posted August 15, 2019 Report Share Posted August 15, 2019 I suspect some was left in the block. When I last refilled my GT6 cooling system I actually added slightly more than the book indicated as capacity! Took 6.5 litres. Whether the half full overflow bottle is included or not I've no idea! Gully 1 Link to comment Share on other sites More sharing options...
Paul H Posted August 16, 2019 Author Report Share Posted August 16, 2019 Thanks Gully I’ll add freeing up the engine drain plug to the list of jobs Paul Link to comment Share on other sites More sharing options...
Ian Foster Posted August 16, 2019 Report Share Posted August 16, 2019 Paul The drain tap can be completely removed, which gives a much bigger hole to poke something through (a large cable tie works well). Suspect you may not want to do this just yet having just refilled the system, but definitely one for the future. Ian Link to comment Share on other sites More sharing options...
Paul H Posted August 16, 2019 Author Report Share Posted August 16, 2019 1 hour ago, Ian Foster said: Paul The drain tap can be completely removed, which gives a much bigger hole to poke something through (a large cable tie works well). Suspect you may not want to do this just yet having just refilled the system, but definitely one for the future. Ian Hi Ian on the list , I did try before but access is not easy . Will need to remove the carbs to get the access Paul Link to comment Share on other sites More sharing options...
Ian Foster Posted August 17, 2019 Report Share Posted August 17, 2019 Paul The tap is close to back of the block and behind the carbs so should be no need to remove them for access. Ian Link to comment Share on other sites More sharing options...
Paul H Posted August 17, 2019 Author Report Share Posted August 17, 2019 1 minute ago, Ian Foster said: Paul The tap is close to back of the block and behind the carbs so should be no need to remove them for access. Ian I did try but the tap nut wouldn’t shift with the limited access . The tap itself came out but there is a blockage with crud Paul Link to comment Share on other sites More sharing options...
SpitFire6 Posted August 19, 2019 Report Share Posted August 19, 2019 Allways found the 2.5 a pain to bleed the air even with an EWP.. Cheers, Iain. Link to comment Share on other sites More sharing options...
Pete Lewis Posted August 20, 2019 Report Share Posted August 20, 2019 Some put the old girl up on ramps to raise the front end , and let the air escape Sorry wrong forum Pete Link to comment Share on other sites More sharing options...
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