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+--- Thread: Knocking noise on low rpm (/showthread.php?tid=10869)
Knocking noise on low rpm - Mike - 13-02-2013
Hello all!
Right ive got some stupid knocking noise when the car is stopped and the clutch is at biting point, continues as i slowly pull off, and when it gets over 1.2-1.5k rpm it goes and dosnt come back.
It also does it when im in say 3rd at stupidly low rpm, but soon as it starts to pick up it goes again.
Theres no noise when driving at all, it just seems to be when its at very low rpm and starting to pick up, happans for say 2/3 secs max depending on how quick it picks up speed/rpm.
It 'sounds' like its coming from the bottom of the engine on the drivers side, clutch vibrates slightly too when the knocking noise is there, but only very slightly.
I have no clue at all what it could be, so ive turned to help off you guys i really am stumped.
Thanks for any help/advice!
Mike
Knocking noise on low rpm - Jtrigga - 14-02-2013
Could be engine mount gone usually the top one makes it knock.
RE: Knocking noise on low rpm - Dave - 14-02-2013
Yeh would be engine mount most likely, the exhaust hits the subframe sometimes, and the increased torque on the block makes it flex to its max when your just pulling away/low engine frequency.
Knocking noise on low rpm - Mike - 14-02-2013
Thanks guys!
I got my dad to sit in, while i pulled the engine to the front of the car and the knocking stopped.
I recently changed the cambelt etc which means i took the mount off, you think it may of just come loose/been put back slighty wrong or it has just given up and gone? As it only started doing it yestarday once the car was put back together and driven.
Thanks again!
RE: Knocking noise on low rpm - Dave - 14-02-2013
You must have times it up wrong, I bet it valve smashing against pistons
I joke, it must be the mount tbh, cant really be anything else if its all running right and you havent touched it...
Knocking noise on low rpm - Mike - 14-02-2013
Haha! Had me going slightly then! Yea it runs sweet as a nut, no smoke on startup or anything, just the knock. Will whip engine mount back off, see if its gone or just come loose.
Thanks dude!
RE: Knocking noise on low rpm - Dave - 14-02-2013
Ideally chock it away from the bulkhead in the cradle
Knocking noise on low rpm - Mike - 14-02-2013
Wedge summit in? Lol
Knocking noise on low rpm - Jtrigga - 15-02-2013
Wedge something in between the buffers on the top engine mount.
RE: Knocking noise on low rpm - puglove - 15-02-2013
Id take the mount right out and check as XU's have a habit of ripping those mounts out
RE: Knocking noise on low rpm - CJ_Derv - 15-02-2013
Agree with puglove they can break away from chassis worth checking but also chock like advised, i got some 5mm steel bent to L shape and drilled hole to put bolt through stops my turbo tapping the bulkhead now
Knocking noise on low rpm - Mike - 15-02-2013
Cheers lads, will have a fiddle today!!
RE: Knocking noise on low rpm - puglove - 15-02-2013
I used a bit of quarry convayor belt to chock it on the gti
RE: Knocking noise on low rpm - spawno88 - 15-02-2013
i had the very same issue when i first got my td, i was thinking i bought a banger and the bottom end was going or the mounts need replaceing, turned out to be the accelerater cable betwwen the intercooler and sill, i just moved it a little and all sorted, but it was driving me insane too