Alfa Pages

Dreamracers

Hi chaps!

Once again, I turn to the oracle that is the Alfa Pages Forum for technical help! (thanks all for help with them pesky door handles).

My 33 is now baffling (PUNN NOT INTENDED!) all and sundry with an intermittant (more present than not) loud rattling sound. It is like someone holding a metal plate against the exhaust somewhere near the middle box and is quite loud.

Middle box has been swapped, nothing lose or around that could be obvious cause....

Any ideas?

Jas · Posted: Thu Jul 31, 2003 12:05 pm Post subject: hmmmmm

I dunno. but i've got what sounds like a single bamboo windchime buried somewhere deep in the bulkhead.

Mixsynth · Posted: Thu Jul 31, 2003 11:51 pm Post subject:

The mid section isn't coming into contact with the tail of the gearbox at all?
_________________
Hugh B
'98 145 QV
'89 33 1.7 16V Veloce SportWagon (in hibernation)
16V conversion pics/videos - now updated with extra pictures and explanations

Gary UK · Posted: Thu Jul 31, 2003 11:57 pm Post subject:

Sure it's not one of your driveshafts rattling??

Dreamracers · Posted: Fri Aug 01, 2003 7:57 am Post subject:

No on both counts unfortunately....

There is a small hole on the front section very close to the engine (a matter of a cm or two from the joint to the head). This has been welded/pasted and matters appear better, but being intermittant, there could be more yet..! Laughing

James Granger · Alfa 33 Joined: 10 Apr 2003 Posts: 302

Got a similar exhaust rattle on our 147. But only over a certain grade of cobbled road (certain frequency).

And I've spotted a minute fleck of rust on the 147's sill!! But it's only minor and it remains a great modern-day hatch. Laughing

Hmm, wonder how the Alfa garage would react if I told them about the latter niggle??!

tvatavuk · Posted: Fri Aug 01, 2003 6:17 pm Post subject:

Mixsynth · Posted: Fri Aug 01, 2003 7:04 pm Post subject:

Just a quick question about those disc covers: if one is missing is it a bad thing?
_________________
Hugh B
'98 145 QV
'89 33 1.7 16V Veloce SportWagon (in hibernation)
16V conversion pics/videos - now updated with extra pictures and explanations

tvatavuk · Posted: Sat Aug 02, 2003 4:16 pm Post subject:

John Pennells · Guest

"... loud rattling sound. It is like someone holding a metal plate against the exhaust somewhere near the middle box and is quite loud."

Your words (above) exactly describe the noise/rattle I had with my 1.7 IE 8V 1993.
This was discovered to be caused by the welds which pin the "box/heat baffle?" that surrounds the rear part of the front exhaust section - where the left and right branches become one - having broken/rotted away, allowing this box to float around the exhaust pipe itself.

Ideally need someone who's a dab hand at welding to retack it.

My cure was to simply to remove this "box" by cutting it away with tin snips ... (can't afford a complete new front exhaust section)

Cheers
John P

rjbevan

Hi, I have a similar problem on my car (although the exhaust on my Clan Clover only uses the front exhaust pipes out of the cylinder heads). I thought it was a loose baffle but in fact traced it to the 2 pipes banging against each other (with the engine at the back the 2 pipes have to cross over each other to get the back boxes across the rear of the car).When the pipes are cold there is good clearance but when they get warm they expand and movement of the engine along with the exhaust pulses means they bang against each other. So I suggest you have a look at the exhaust run and check there is good clearance between exhaust and body and that any rubber hangers are not soft and allow a lot of movement.

Richard

driver33p4 · Alfa Arna Joined: 14 Jun 2003 Posts: 12 Location: Scotland

Tino
try Alfashop for the rear disc covers.

Marcin · Posted: Fri Aug 08, 2003 7:48 am Post subject:

Hi,

I am also suffering from the "rattle problem". I thought it was the metal box where the left and right exhaust pipes come together (as mentioned above). I replaced the complete exhaust line, no, not because of the rattling, but the rear muffler broke off and the catalyst was shot. And the rattling is still here... Recently I found out, that it's probably (99.9%) one of the camshafts. I'll have a look at it in few weeks.

Cheers

Marcin

tvatavuk · Posted: Fri Aug 08, 2003 8:33 am Post subject:

Guest · Posted: Fri Aug 08, 2003 12:53 pm Post subject:

sorry - I should have said that I meant the UK based Alfashop link as follows-
http://www.alfashop.co.uk/

tvatavuk · Posted: Sat Aug 09, 2003 8:16 am Post subject: