#1: Air , hissing noise coming from coolant tank Author: eddrj, Location: BerkshirePosted: Sun May 15, 2011 12:27 pm ---- Just noticed werid air noise coming from coolant expansion tank any ideas , ? anyone else had this ?
Is it air lock or need new cap cause know they have 15psi on them , ive had coolant changed few months back.
Thanks
#2: Re: Air , hiossing noise coming from coolant tank Author: bigtony85, Location: NottinghamPosted: Sun May 15, 2011 12:47 pm ---- is vehicle overheating?? or heater not working??
#3: Re: Air , hiossing noise coming from coolant tank Author: eddrj, Location: BerkshirePosted: Sun May 15, 2011 12:51 pm ---- goes high in traffic dont think fans working, never overheated though no , heater is working yeah.
Just gone out and its still hissing at me lol like a snake coming from coolant tank notice it when been for a drive then get back look under bonnet and hear it . Last edited by eddrj on Sun May 15, 2011 12:58 pm; edited 1 time in total
#4: Re: Air , hiossing noise coming from coolant tank Author: bigtony85, Location: NottinghamPosted: Sun May 15, 2011 12:58 pm ---- sounds like back pressuring aka head gasket probably
#5: Re: Air , hiossing noise coming from coolant tank Author: cartoonhead, Location: North ManchesterPosted: Sun May 15, 2011 1:02 pm ---- have you bled it by the 2 bleed places ?
#6: Re: Air , hiossing noise coming from coolant tank Author: eddrj, Location: BerkshirePosted: Sun May 15, 2011 1:02 pm ---- but the oil and coolant are fine arent sluggey brown colour thought that was main symton of head gasket and no coolant leak .
I have nothing else wrong just werid air noise .
#7: Re: Air , hiossing noise coming from coolant tank Author: perry081064, Location: staffordshirePosted: Sun May 15, 2011 1:02 pm ---- sounds like its got a fair bit of back pressure.
could be the start of a headgasket failure, it may be worth your while having it checked at a garage to see if gasses are present in the cooling system, also check the coolant for oil in the mixture.
#8: Re: Air , hiossing noise coming from coolant tank Author: eddrj, Location: BerkshirePosted: Sun May 15, 2011 1:03 pm ---- Not sure ,my mechanic did it so i duno about the bleed srews
#9: Re: Air , hiossing noise coming from coolant tank Author: bigtony85, Location: NottinghamPosted: Sun May 15, 2011 1:07 pm ---- get the coolant sniff checked. the coolant and oil dont need to b sludgy to mean a blown headgasket.
#10: Re: Air , hiossing noise coming from coolant tank Author: eddrj, Location: BerkshirePosted: Sun May 15, 2011 1:08 pm ---- coolant sniff ?? also thought loss of power is a sign and goes well the same
#11: Re: Air , hiossing noise coming from coolant tank Author: cartoonhead, Location: North ManchesterPosted: Sun May 15, 2011 1:11 pm ---- there's 2 bleed places.
one is at the front and there's another thats on the pipes that go to the heater matrix
( next to brake servo , round black plastic thing with a slot for a screw driver ) Last edited by cartoonhead on Sun May 15, 2011 1:12 pm; edited 1 time in total
#12: Re: Air , hiossing noise coming from coolant tank Author: bigtony85, Location: NottinghamPosted: Sun May 15, 2011 1:11 pm ---- like perry said they test for gasses in the coolant. with a blue fluid in a tube if it turns bright yellow/green there is a head gasket fault dont have to b down on power ether.
#13: Re: Air , hiossing noise coming from coolant tank Author: perry081064, Location: staffordshirePosted: Sun May 15, 2011 1:12 pm ----
eddrj wrote:
coolant sniff ??
garage will put a special mix into a tubey type thing and suck the mixture.
( if it turns dark blue , bend over and pass him the vasaline )
#14: Re: Air , hiossing noise coming from coolant tank Author: perry081064, Location: staffordshirePosted: Sun May 15, 2011 1:13 pm ---- sorry my mistake ... green
#15: Re: Air , hiossing noise coming from coolant tank Author: eddrj, Location: BerkshirePosted: Sun May 15, 2011 1:14 pm ---- ok there are the 2 bleed places,
what do i do and how much do i turn them i havent got a clue lol soz .
Ok il get my mechnic to take a look at it
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