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new water pump, thermostat, new alloy rad, new hoses, new header cap, new head gasket, head all tested, matrix checked ok, bled the system numerous times, no blockages, but the coolant will not flow the water always stays freezing cold in the header tank it never pressurises or boils over and the temp gauge goes through roof, any professionals who can crack this issue?? thanks. seriuosly i challenge anyone who can figure this!
Last edited by carterhall14@hotmail.com; 17-06-2016 at 07:49 PM.
hi yes fully rebuilt the engine so replaced everything for new peace of mind but that peace is shattered lol everything is brand new very frustrating indeed mate
checked stat its in correct. and i bought the new water pump a while ago but cant remember if it was a pinto one i bought because everybody told me they fit? its not the open vane one..
checked stat its in correct. and i bought the new water pump a while ago but cant remember if it was a pinto one i bought because everybody told me they fit? its not the open vane one..
Take a pic and post it, I might be able to help but need to see the engine, especially the pump
yeah mate the rest is standard, i can not get the water to flow through the small return from the turbo back to header even tried ypassing the turbo coolant its very annoying like mate.
Last edited by carterhall14@hotmail.com; 18-06-2016 at 04:46 PM.
Few things to check, stat is right way round, stat works and isnt faulty, try putting in cup of boilled water and see if it opens for rule of thumb, or putting old one back in if u have it, check for absructions / blockages in hoses /system ,or sender unit is faulty maybe and telling u engine is overheating when its not , have u got a itemp probe to check ,infra red gun to check engine temp , hop this helps ?????
mate the water isnt flowing the water stays ice cold in the header tank and there is no return flow at all.. its not a broken gauge. the stat is also in correct.
Some engines youll get flow into header tank only when the stat is opened, might be worth checking the stat is actually working and not faulty as the symptoms sound like a sticking closed stat, if thats all ok do a snif test next ��
appreciate your input mate but the stat is working great been checked, as for sniff test the whole engine is rebuilt with everything tested before assembly
one thing i will add is that the brand new water pump does not spin freely. it isnt making noise/leaking or wobbly. if i try to spin in quickly and let go it stops if you know what i mean.
one thing i will add is that the brand new water pump does not spin freely. it isnt making noise/leaking or wobbly. if i try to spin in quickly and let go it stops if you know what i mean.
Ok so your happy with, pump , and stat, hoses , air locks , so maybe check for an obstruction in new rad .? Keep an open mind and substitue things for known good parts if still available mate
just to throw something else in here which i forgot to mention, the header tank im using is a CVH with the one bottom hose coming out and joining the t-piece in the lower rad hose. and the return coming from the turbo going to the small top outlet, also ive noticed the height of the header tank is lower than that of the cossie one. any idea if this would affect the flow?
Last edited by carterhall14@hotmail.com; 19-06-2016 at 04:14 PM.
The top connection on that header tank has a weird fitting sticking out that looks like it would stop the flow back in, can you post a pic of the engine bay?
The top connection on that header tank has a weird fitting sticking out that looks like it would stop the flow back in, can you post a pic of the engine bay?
That is a reinforcement so that the plastic doesn't collapse when you tighten the jubilee clip up IIRC
17-06-2016, 07:37 PM
very very! strange coolant issue with cosworth YB
