Loud distinct knocking when accelerating in low gears - Saxperience

dolby20 · 27th October 2011, 18:10

Hi on my 02 VTR I experience a very loud knocking noise when accelerating through 1st, 2nd and 3rd.
Admittedly, the acceleration is rather hard, but I'm puzzled as to what the sound is...
In my head it sounds like it is coming from the front right of the engine, or behind the drivers head light

Any ideas?

BertieG · 27th October 2011, 18:17

Quote:

Originally Posted by dolby20

Hi on my 02 VTR I experience a very loud knocking noise when accelerating through 1st, 2nd and 3rd.
Admittedly, the acceleration is rather hard, but I'm puzzled as to what the sound is...
In my head it sounds like it is coming from the front right of the engine, or behind the drivers head light

Any ideas?

is it a knock when you change gear, or the whole way through the gear?

dolby20 · 27th October 2011, 18:23

Quote:

Originally Posted by BertieG

is it a knock when you change gear, or the whole way through the gear?

It'd be at the start gear as I accelerate but only under hard acceleration

dolby20 · 27th October 2011, 18:35

Might have a go at recording the sound and posting on here
It's a consistent knock until about 3k rpm when accelerating hard in the first 3 gears
To me it sounds like its around the ecu/alternator side of the engine
But it must be loud if I can hear it inside the car!

-scott- · 27th October 2011, 19:01

Might be exhaust knocking against back axle or the engine mounts gone. Try going along in like second and tap the throttle and if it knocks then it will be engine mount!

dolby20 · 27th October 2011, 19:10

Quote:

Originally Posted by -scott-

Might be exhaust knocking against back axle or the engine mounts gone. Try going along in like second and tap the throttle and if it knocks then it will be engine mount!

I've done the exhaust, and it won't make that noise
Will try that other thing

Thanks

trex3491 · 27th October 2011, 22:34

I had a knocking in my old clio, before upgrading to a sax. It was the lower engine mount worn, does the gear stick move while accelerating or depressing the clutch?

dolby20 · 27th October 2011, 22:38

Quote:

Originally Posted by trex3491

I had a knocking in my old clio, before upgrading to a sax. It was the lower engine mount worn, does the gear stick move while accelerating or depressing the clutch?

never noticed, but shall have a look tomorrow
thanks