NG ticking under slight load

5cyleargasm · 19-08-13, 06:04 PM

Hi, back with an issue that's not huge as such just a bit irritating .... I get a ticking not so noticable on very light throttle but mid throttle is quite 'tickety' 160k is it a cracked manifold or tappet clearences ...... Manifold looks like a sod to remove

Hanuman · 19-08-13, 06:07 PM

Might be as simple as a loose gasket/broken stud.

5cyleargasm · 19-08-13, 08:32 PM

Hmmm yeah that's what im thinking I guess il need to remove the inlet manifold and the exhaust manifold and check it over / fit new gaskets etc ..... Not alot of hand / tool room from the looks of it .....

mikes2 · 19-08-13, 08:56 PM

On the NG, it can also be the vacuum pump which can tick

5cyleargasm · 19-08-13, 09:45 PM

Vacuum pump ? Hmmmm im not sure where that is ..... I'm having a thick moment !!

Brian83 · 19-08-13, 10:47 PM

Not mild knock is it? Does it clear up at WOT?

5cyleargasm · 20-08-13, 07:32 AM

Well it doesn't sound like knocking, not noticable at idle but drive it and its apparent , I can't hear it at wot but the stainless exhaust plus holey airbox / panel filter make a better kind of noise

I would have said piston ring possibly , compression seems ok a slight dip on the piston at front of the engine but according to Haynes its within tolerance . Runs ok starts ok idles fine... Sooooo dunno il investigate the manifold I think at some stage !

msh · 20-08-13, 09:43 AM

I don't get it - why do you want to remove manifolds - are they so loose that they are rattling against the engine?

If seriously, leave the manifolds in place, if you don't want to make problems where they aren't, as manifold removal has quite a big chance of getting the threads out of the stud holes. What is in idle - is there any thicking? Does it idles well?

Btw, how much is the compression?

5cyleargasm · 20-08-13, 01:35 PM

Well, I am purely assuming its from a crack in the manifold so may have to remove.... I won't until I find out for sure where its coming from

im open to suggestions the compressions from bulk head forward are as follows (in bar) 12.2 13.1. 12.8 13.0. 10.6....according to Haynes max difference between cylinders is 3 bar

5cyleargasm · 20-08-13, 01:36 PM

And it idles fine

19-08-13, 06:07 PM	#2
Hanuman Trickster Classic Audi Club Member Join Date: May 2009 Location: Heckling from the cheap seats, Phnom Penh, KoW Posts: 7,028	Might be as simple as a loose gasket/broken stud. __________________ I wish they would keep the damned Chinese away now that I can go home, so that I can enjoy Fish amok and a draught Angkor

19-08-13, 08:56 PM	#4
mikes2 4 ring whore! Classic Audi Club Member Join Date: Nov 2007 Location: Polmont Posts: 2,617	On the NG, it can also be the vacuum pump which can tick __________________ 1991 90 quattro 20v sport 1991 90 quattro

19-08-13, 08:32 PM	#3
5cyleargasm Grown up member Join Date: Dec 2011 Location: Plymouth , Devon Posts: 42	Hmmm yeah that's what im thinking I guess il need to remove the inlet manifold and the exhaust manifold and check it over / fit new gaskets etc ..... Not alot of hand / tool room from the looks of it .....

19-08-13, 09:45 PM	#5
5cyleargasm Grown up member Join Date: Dec 2011 Location: Plymouth , Devon Posts: 42	Vacuum pump ? Hmmmm im not sure where that is ..... I'm having a thick moment !!

19-08-13, 10:47 PM	#6
Brian83 Grown up member Classic Audi Club Member Join Date: Jul 2011 Location: Loughborough & Lincoln Posts: 662	Not mild knock is it? Does it clear up at WOT?

20-08-13, 07:32 AM	#7
5cyleargasm Grown up member Join Date: Dec 2011 Location: Plymouth , Devon Posts: 42	Well it doesn't sound like knocking, not noticable at idle but drive it and its apparent , I can't hear it at wot but the stainless exhaust plus holey airbox / panel filter make a better kind of noise I would have said piston ring possibly , compression seems ok a slight dip on the piston at front of the engine but according to Haynes its within tolerance . Runs ok starts ok idles fine... Sooooo dunno il investigate the manifold I think at some stage !

20-08-13, 09:43 AM	#8
msh 4 ring whore! Join Date: Jun 2008 Location: Rucava, Latvija Posts: 3,816	I don't get it - why do you want to remove manifolds - are they so loose that they are rattling against the engine? If seriously, leave the manifolds in place, if you don't want to make problems where they aren't, as manifold removal has quite a big chance of getting the threads out of the stud holes. What is in idle - is there any thicking? Does it idles well? Btw, how much is the compression?

20-08-13, 01:35 PM	#9
5cyleargasm Grown up member Join Date: Dec 2011 Location: Plymouth , Devon Posts: 42	Well, I am purely assuming its from a crack in the manifold so may have to remove.... I won't until I find out for sure where its coming from im open to suggestions the compressions from bulk head forward are as follows (in bar) 12.2 13.1. 12.8 13.0. 10.6....according to Haynes max difference between cylinders is 3 bar

20-08-13, 01:36 PM	#10
5cyleargasm Grown up member Join Date: Dec 2011 Location: Plymouth , Devon Posts: 42	And it idles fine