The small square gasket that goes between the turbo flange and the place where it mounts onto the manifold.
Been having issues with this, before I got my car rebuilt it never ran one and I never had any issues, when I put it back together I decided to put one in, it lasted about 300 miles then melted, i bought/brought another one and it lasted an even shorter time before doing the same, they were both metal, so when I saw melted I mean it disintegrated and there was less than 1/4 of it left.
Do most people run without them?

 

i ve never ran with one and never had a problem,
nor has any off my mates

 

I have had over 20 cozzies over the years and never seen one on any of my turbos. I always finely sand the two faces after run for a few mins seals up itself lol

 

If its a daily driven car not getting used hard and you are bothered at the slight bit of noise you tend to get from not running a gasket then use one, but IME they tend not to be reliable on cars getting used hard.

Personally I never use them anymore having had failures in the past when I have done so.

 

Never used one.

 

Thats handy info to know right now cheers

 

I have always been told never to use them

 

I've used one on every turbo i've fitted - got one on now and have never seen any fail, melt or cause any issues.

I have heard of loads of people saying now they don't use them like you do further down the 2wd manifold where it splits but i had issues here with sealing mainly due to the non standard bolts previously being used and failing out - but got the correct material ones in there now.

 

i put a cometic one on my t24, blew it within 10 miles, so guessed it was faulty, changed it again, and it lasted about 8 miles this time, took it off and ran without, not a problem since.

 

These are the metal ones where talking about here?

 

http://www.ebay.co.uk/itm/TURBO-MANI...item5d31a065bb

One of those?

 

Ive heard a few bad things about fitting these too.

 

Thanks for the input everyone, confirms it for me. WongRS, yes thats the gasket I mean, not the same supplier though.

 

Right now i see, the one in question looks wrong - i have had this one fitted for to every turbo of mine without any issues what so ever

http://www.ebay.co.uk/itm/Garrett-T3...85481119067388

 

I would think your manifold or turbo flange is warped letting gasses pass and washing the gasket, i would lightly sand the faces and try a straight edge on them.