coolent blockage?

[t-dub1902]

Hi guys
Having some greif with my mk2 gti

Basically i think theres a coolent blockage as when thw engine gets warm hoses are tense and bottom hose keeps popping off!!

I dont understand why its doing this but its making thw car un useable!!

Any help or solutions would be great
Cheers

[EsSeX dAn]

get the coolant bottke sniff tested, sounds like a possible head gasket leak

[Gambit]

Can you see the water circulating with the cap off the expansion bottle?

[oakgreener]

It sounds like the coolant is pressurising. And that will be the dreaded head gasket

[t-dub1902]

To be honest i did expect it!! Not loosong water though untill latly it started to pop the bottom.hose off! Are head gaskets expensive on mk2s??

[JimR]

Dont fear the worst just yet, the hoses are meant to pressurise slightly, are your hose clips up to scratch, is there any chance your oil cooler could be past its best? Are you getting the dreaded sludge on the inside of the oil filler cap and the water filler cap? Also on the dipstick? If you do think it may be a headgasket at least get the cylinders pressure tested, if its overpressurising your water you may have a burnout between cylinder and water ports which will show as a low compression on one (or maybe more).

[t-dub1902]

Thats ot im not actuslly gettong any sytoms like sludge etc

It does spoke when warm but cpuld that be burning oil??
What should be next steps be...

[clipperjay]

Check the overflow pipe from rad to expansion bottle its a tiny pipe have known to have build up of calcium and blocking return flow. Or use a two part rad cleaner first and see if it moves the water better. Just do a test in the expansion water for hydro carbons to see if you do have a leak into the block.

[dadrathers]

Your symptons are exactly what I had a while back - turned out to be a little blockaege of sh@t inside the radiator where the small bore  overflow pipe joins.  So basically as Clipperjay suggested.