Strange knock (tap) noise

[CJ_Derv]

Hey guys,

Now i may be being daft here, but since fitting the TD04 ive got a tap ( knock) noise now and then against the bulkhead, there is roughly 5mm between turbo and bulkhead and doesnt touch when idle or revd standing, now i havent had a proper look but thinking maybe exhaust against tunnel with new turb, or the actual turbo itself

Now its wierd because it doesnt always do it, it mainly does it if i jolt the throttle, ie press and release quickly, or sometimes when change gear,

i coudl possible do with checking top mount as had this go before just cant get my head round it and it irritates the shit outa me its that loud when it does it people walking by hear it lol

any idead guys?

[cwspellowe]

Does sound like it's fouling the bulkhead mate, bear in mind the mounts are only rubber so if you're changing gear hard or f*cking about with the throttle the whole thing will rock quite heavily, more so than when it's sat still. Watch dyno videos and you'll see how much engines can move on standard mounts.

First job would be to chock the top engine mount with some appropriately sized bits of metal angle. Make sure it's wedged solid and go for a drive. Could always try one of the Group N top mounts as they're harder rubber, or keep the chocks in like I did with the GTI6.

[CJ_Derv]

Yeah top ones chocked had a look at bottom and its span the way that will giv too much forwards n backwards rock, will get powerflex i had on blaze n c if it makes a difference if not wil smash bulkhead some more when i retap head for manifold bolts

[the milkman]

was about to say cj your mounts arent exactly in the best of conditions.......

[CJ_Derv]

True ash u noticed tht on dyno ha

[the milkman]

i noticed outside my house when the bottom mount first went!!!

[CJ_Derv]

I cant find my powerflex one

[Ben]

If you wanted to make sure it was turbo hitting bulkhead use a little bit of paint or similar on the bulkhead and see if it comes off.

[CJ_Derv]

Would be difficult ben iv got a chock in top mount going to slide it in the other way and see it if pulls engine forward 5mm which should do it