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Hey, did you buy the original VW Cap. I didn't work for me when I bought a similar fitment from an auto parts store. It would have to be an original VW part Cap

@sidewaysfijian thank you, ill try to get the vw cap

Hey, bubbles would normally indicate air trappedin cooling system, its important to release help release it. You can google search more about purging/burping bubble out of your cooling system. Tonnes of content on how to, important only begin process when coolant is cool.

@@sidewaysfijian thank u

Sorry to hear that, sounds like a trouble you dont want. To be honest it could have been due to any reason. Probably when installing a new radiator do real proper coolant flush with distilled water. And then diagnose from there.

@@sidewaysfijian I’m actually in the process of flushing the system . I did a block test it stayed blue after I flushed everything a few times. I’ve noticed my heater core hose is bent , do you think that would cause the heat to back pressure

Sounds exactly as what i had, once i replaced the water tank cap (original VW) that water level stayed same. What about checking for residues around the water tank. I had to leave a few wraps of white cloth to pick up any coolant residue. Esp around the water tank. Along with cutting small strips of white cloth to tie on the connections.

Hi mate, i personally didnt have any noise it was a quiet motor. Possibly good get an opinion from a local VW service.

Was the Cap and water tank genuine Volkswagen? If it is, best get a mechanic to do a pressure test. Another thing is, make sure you have taken the air pockets out or purge it. You will find video online on how it. Mainly by leaving the water tank cap open and pressing along the coolant pipes

@sidewaysfijian okay so what may be the problem?

@alidaher4356 yeah I also used cap and water tank for a regular auto store but when I changed it with a genuine part it stopped. As I mentioned on the video, only works with the genuine part (cap and water tank)

Yeah I reckon check with the simple cheaper stuff. If you can first get the top blue cap 1st and make sure its genuine VW. After that's done, since you already replaced thermostat do check if the lower radiator hose has water flowing well to cool that water via radiator

For taking out any air bubble you will have to squeeze the lower radiator hose while the cap not fully tighten. If your coolant level keeps dropping don't ignore it there's a leak somewhere.

@@sidewaysfijian when I topped it again as I said I observed that there was no coolant leaking to the ground and its maintaining the coolant level. Am I safe?

@intrudxxx sounds like you had it easy 👍, you should be safe. I would regularly check the coolant for a week atleast just to be safe.

@@sidewaysfijian yea I'm keeping an eye whenever I'm planning to go out

Let me know how it goes. I had minor leak towards right of the engine, just above the auto transmission there's another coolant flange adapter which has seals that worn out attached to the engine block.

Hey mate, I used drive my car for 15-20mins after temp goes up to normal. Later park the car back home and lift up bonnet to see where coolant is exploding from. I'm sure from the expansion tank hoses

@@sidewaysfijian so your hose(s). were perished ? Fixed now ,?

@kevinhancock4064 you will have to see where your problem area is once you run the car n park to inspect. My problem was the tank and the Cap.

@sidewaysfijian ooh OK well tomorrow I'll pick up some treatment solution again I got water today 4 x 2.5l .......I'll fkush it out ..I've got a new radiator on route anyway if I need it as I was sire a lottke while ago I had coolant on top of rat maybe it's over pressured amd gone bad (,leaking ) . The exp tank is new oe . Really hoping to remedy the issue and all else is ok . Fingers crossed ..I'll do a bit of testing Tom.once I done so amd look for fans kicking in again..they do function obvs more so if ac is on and I'm.sure I've heard them.recently. new sensor in car btw ty ill let you know

@@kevinhancock4064 all the best hopefully gets fixed

N 90365302, hey mate refer to this link it helped alot for me with part searchs vwgolf5catalogue.blogspot.com/2015/12/coolant-cooling-system-20-ltraxwblxbly.html?m=1

@@sidewaysfijian thanks mate, appreciate your help

Hey mate, I do recall it took between 2 to 4 hours but that depends your garage access and tools and parts too, eg when I replaced the thermostat the water leaked because of of an o-ring on a pipe that connect to that thermostat. Highly recommend checking o-rings that connect to the thermostat

The only other hose flange I had to replace was one that's mounted to the left side of the engine!!

Thanks mate, yup I hope that's the last of my worries. Its been reliable for towing so far.