Help - Funny noise from cold ?

[vrs james]

Thought id post a quick topic as, today from cold my mk1 ocy vrs made a horrible noise from start that lasted for approx 1 minute, then suddenly it whent and has not done it again :S ??? sorry for being lazy and not searching older posts! the noise sounds as though my manifold has a massive hole in it ? it has not happened again today but the car is now warm i suppose, any ideas would be great

[rk696]

They all do that

[chicken_eyebrow]

Have you only just got the car?

It's the secondary air pump working should go away after pretty much exactly 90 seconds.

[vrs james]

had the car over 6 months now, first time ive heard it it does sound terrible, the wife heard it from inside the house and yes it could have been 90 seconds and stopped, it did make a little woosh noise upon stopping ????

[VRSerious]

had the car over 6 months now, first time ive heard it it does sound terrible, the wife heard it from inside the house and yes it could have been 90 seconds and stopped, it did make a little woosh noise upon stopping ????

Have a search on here there are loads of posts! all thats happend is you rivets have gone on your secondary air pump, easy fix.

[vrs james]

well at least it seems its a common problem !! secondary air pump ? rivets ? I know nothing !!! will do some looking up - just quickly when you say easy fix do you mean replace the rivets or the pump as a whole unit....

cheers guys

[pauldazzle]

The 2 halves of the secondary air pump housing are riveted together, & eventually the rivets fail causing the housing to seperate. Fix involves removing the rivets & replacing them with nuts & bolts. There's a good how to on uk-mkivs,net.

It's worth making sure the 2 pipes that attach to the pump are secure too.

[pauldazzle]

Heres the link to how to repair. http://uk-mkivs.net/forums/p/141240/940861.aspx#940861

[jpd]

Just take it off and then no noise.

[vrs james]

cool, ive had a look at that link. looks good but i dont have half the kit required will find someone to do it for me, jpd can they just be taken off ??

cheers

[mbames]

Not sure what kit you don't have to do this job, but getting yourself a few basic tools would be a good way forward and to be honest the cost of the tools would probably be cheaper than paying a garage to do this - as they most probably fit a replacement secondary air pump rather than fixing the old one, so that would bump up the price somewhat.

[chicken_eyebrow]

If you take the whole thing off you need a blanking plate from Forge to fit to the side of the engine

http://www.forgemotorsport.co.uk/content.asp?inc=product&cat=200101&product=FMEGRBP

And you also need to fit a resistor into the multiplug to fool the ECU into thinking the secondary air pump is still there.

If you're happy with a socket and drive set it's easier just to take the pump off and replace the rivets with bolts and put it back on.

[jonoyork]

hi chaps, does the secondary air pump affect the idle?

the problem is the same as above but the idle pulses as well after the noise has gone.

and also she seems to splutter!!

Edited 2 August, 2010 by jonoyork

[chicken_eyebrow]

While the secondary air pump is working the idle should be about 200rpm higher than usual but it should settle down after that. If it isn't settling down after starting it from cold and letting the secondary air pump do it's thing you may have a dodgy coolant temperature sensor.

[pauldazzle]

Worth removing & cleaning the throttle body too. N.B. do not force the butterfly flap open on drive by wire throttle body.

[jonoyork]

Worth removing & cleaning the throttle body too. N.B. do not force the butterfly flap open on drive by wire throttle body.

Is it easy to do?

I don't no were to start anyone got pics to help?

Cheers.