Re: Bob's friend's TQC noise...

["Anthony K.B. Chan" <chan@seattleu.edu>]

You also want to check the last two exhaust manifold's studs on both ends 
of the exhaust manifold. It's very common for early models 5 cylinders to 
have broken exhaust studs since the OEM studs were too soft to start with.
I used to own an 85' 5000s which has 4 broken studs, 2 on each end and they
make a ticking noise particularly loud when the engine is cold, exhaust gas
escaping from the gap at the 2 ends of the manifold. As it heated up it 
expanded and eventually seal better and noise become lower. I eventually 
have my mechanic replaced all of them. It's not an easy job, the dealer 
wanted $500 for the job, I got it done at an independent shop for around 
$300. They drilled out the 4 broken ones resurfaced the manifold. What a 
big difference after they fixed it.

Anthony Chan
chan@seattleu.edu
92' 100 V6

On Tue, 30 Jan 1996, Bryan Gunn wrote:

> Hi Bob, et al,
> 
> Bob, I'm only going to guess once: cracked exhaust manifold. You'll get a 
> "ticka ticka ticka" noise that sounds like lifter noise. Just about every
> Audi with a one piece manifold eventually cracks it. When everything expands 
> as the engine warms, it closes (sometimes). Of course, sometimes the 
> manifold doesn't crack - the head does!! Let's hear it for those brilliant
> Audi engineers! Bolt a big long piece of cast iron onto an aluminum alloy
> head then rapidly heat and cool the whole deal a few thousand times. Hmm.
> I wonder if something will break. If the crack is big enough, enough 
> exhaust will escape that it affects the turbo. But hey - no sweat. Those
> awesome Audi engineers made it really easy to get to the exhaust manifold.
> They tucked it under the intake manifold and then leaned the engine over 
> 27.5 degrees. So all you need to remove the cracked manifold is a nice,
> warm day, a shady garage, a few simple tools, and a few thousand dollars 
> for your mechanics week of labor he'l spend to pull the thing and replace
> it. Plus the cost of the new manifold.
> 
> At least you can replace it with a two-piece manifold that won't crack.
> 
> Sorry about blowing all this sunshine up your *ss.
> -- 
> Bryan Gunn                  Email: bgunn@voicetek.com 
> Voicetek Corporation          Tel: 508.250.7998
> 19 Alpha Road                 Fax: 508.250.9378
> Chelmsford, MA  01824
>