Basically my header tank (alloy spec r ) gets absolutly ROASTING HOT can hardly touch and get a fair bit of pressure if tryin to open cap but is not that bad if let my fans go off, and if i have been giving it some i.e 120ish+ it seems to be spraying water from somewhere ? is defo coming from header tank i.e cap fans come on as usual and go off , and car drives and runs great but this water temp thing is puzzling and annoying the tits off me temp sits between O and R on guage when driving round it is stage 3 with pace rs500 cooler , so any ideas guys on this could it be anything to do with my rad

any help appreciated

 

possible head gasket failure at worst or header tank cap worn out at best !!!

 

Basically tonight i put my mates cap on (same cap) mines made a horrible squeeking noise on tightening and his went on without any of that but didnt go out a run but mines looks fine ? would this make a difference on pressure guys i find it strange that cap would be a big deal

 

Yeah Rab I had a fucked cap on the grey car and it was similar to what you describe mate, swapped it for another and all was fine

 

The cap is NOT just a cap !!!

It is a pressure relief valve aswell and when it wears, it releases pressure and water TOO soon.

They are only £2.99 from ford

 

r u being serious on this post the header tank is hot to touch once I've given the car some come on man thats like saying "why cant I touch the exhaust manifold to remove the nuts once I've started it" change the cap lol

 

LOL

Yeah does sound stupid , no but think its just TOOOOO HOT does the ford water caps fit the spec r alloy header tank ? mines is kind of dark blue in colour

 

If you dont replace the cap you may well find that when you next undo it , it will fall apart. Mine did that. The cap came of but the bit inside with the rubber sealing ring was stuck on the tank neck LOL

 

What kind of tank did u have gazcos , what kind of cap do i need do i need a spec r one or bailey ? my friend has a bailey tank and his cap is identical

 

I cant remember without looking. Its not the one in my siggy, its on my Saph but it uses a standard Ford cap . The tank on my 3 door was a Bailey one and used a Bailey cap (smaller than a Ford one )Hope that helps

 

I have a Spec R with sight glass have a yellow standard Ford cap for a Cossie on it and If run for about 5 mins or less I CANT undo it with my hands and need to use a pair of side grips(like molegrips) and YES the tank itself does get very hot

 

mmmmm wonder if they do the cap seperate mmmm will phone tomorrow
thanks for the help although will be suprised if this cures the pressure etc , but some of yous guys have seen this before so will take your advice

thanks alot for the replys

 

Good so ford ones dooo fit mm lol how hot we talking

 

mm lol how hot we talking

well let's just say when I have my bonnet open have had so many people that while having a nose place their hand/arm on it and they ALWAYS seem to jump about with the pain so hot hot hotvery hot

ps I think Bailey's use a darky blue coloured cap(sort of domed shaped) IIRC

 

My cap squeaks when going on and off? Does that mean its replacement time?

Also,mine is black,not the usuall ERST yellow..?

 

Edited (thanks to Spenner):

Yes Alvyn, the Bailey header tanks come with a higher pressure cap (i.e higher pressue than the standard Ford yellow cap)......

The Bailey tanks use the Audi/VW dark blue pressure cap, important to note that these caps have a different diamater & thread size to the Ford items, so you cant just fit these dark blue VW caps to a Ford plastic header tank or to "some" Spec-R header tanks.

 

i can't touch my nice shiny stainless steel kettle either roflol can any one help

 

the cooling system is pressurised to prevent it from boiling, water boils at a much higher temperature when pressurised
Hope this helps

 

The Pain

 

can't under stand it stu it's fine when it's full of cold water do u think it may need live mapping

 

sounds just like mine used to be

this was the cause

 

Why not mate?

Mine is a dark blue cap and fitted to a Spec-R header tank.Should i change it to a standard header tank cap?Car run's hot

 

Edited: Please see Spenner's reply below.......

 

Alloy header tanks always get red Hot

 

Will change cap lads and tke it from there was told by spec r today they had alot of problems from these caps on there stuff and they dont use them anymore so he did tell me a part number and i can get one from VW/AUDI garage

 

Im still hurting now

 

ROLFLMFAO

do u think im paranoid then troops

 

rabs got cossie paranoia. Welcome aboard

 

Pete at spec-r made some tanks with blue vw cap but generally they have standard ford yellow caps they are not interchangable they have different necks pete now generally uses radiator caps these are high pressure i think you can send your tank back and for a charge pete will change the neck. The standard ford cap is i think 1 bar and rad type neck is 1.5 bar . Out of interest the standard cap is generally fine if in good condition

 

spenner this is what pete said to day he said if i send him my cap (i think he said only cap) he could mod it too like radiator style and nothings upsetting this thing told me to pop into VW/AUDI garage as well

 

Cheers

But....I never got a cap with my Spec-R tank I just used the cap from my plastic header tank when i changed them over,it just happened to be dark blue?

Im confused as hell right now.Never thought id be concerned about a header tank cap,cheers Rab