18 replies to this topic

[benfredjosh]

hey if i accelerate hardish then take my foot off then put my fooot back down hard i get a big big knock noise coming from by the footwell but otherside of the firewall any ideas what it is its worrying me?! if i pull off too fast it also doesit?! eeek!

[Bungle]

have a look at engine mounts and steady bar rubbers :smartass:

[dan__wright]

kats used to do this aswell, its the engine jumping about / hitting bulhead in some cases, fitted untimate top engine steady and check / tightened mounts.

[benfredjosh]

ahh it scarred me!

[Guess-Works.com]

steadies and mounts... aand if you have solid mounts, check the firewall is no starting to split.... but the most common one is the bracket which serves to hold the clutch pipe and the top engine steady to the bulkhead has parted company...

[dan__wright]

is often the carb hitting the bulkhead, would take it easy if i were you until its sorted as quite a few people have bent jets and stuff.

[miniboo]

mine does this but ihave checked all the steadies so now i have to do the engine mounts!! nightmare to get to aswell.

Thats after i have done the rear subframe aswell!!!!

[ed4ran]

is often the carb hitting the bulkhead

Hes ok there as its Injection.

[vitruvian]

I got the exact same problem. Is it hard to change engine mount by myself at home? Since I'm located in South Korea and there are no garage specialize Classic Mini. Hell they don't even know what kind of car it is...

[MINImiser]

Ive got a Mpi cooper and have the same problem!! 1 of my mates said about enginge steadies/mounts but took it to a local garage but they said it was fine!

Dunno whats going on!

ED

[marsy]

yeah mine did that it was the engine steady left hand side of engine, bolt snapped off in engine so had to get a repair bracket, still had some knocking noise(engine moving back an dforwards) so i fitted an ultimate engine steady, and its fine now!
to test if engines moving forward and back, get someone to rev ur engine whilst u watch the engine, it will probably move, hope that helps!

[MINImiser]

Looked at the engine steadies they seem ok, revved the engine up there was movement, is it not supposed to move at all, as the movement was very slight?


Cheers

Ed

[marsy]

check see if ur exhaust is secure that could be moving about' knockin'?

[Dan]

If you blip the throttle really hard it will move slightly but it should be pretty solid if you try to move it by grabbing the rocker box and shaking. I know everyone loves to fit ultimate engine steadies but for all standard and most mildly tuned engines they really aren't needed. You may have checked the bushes in the steady bar but have you checked what the bar is secured to? The master cylinder base plate is pretty flimsy and can come loose or the hole in it that the bolt passes through can elongate in which case no matter how tight you do the bar up it simply won't hold. The lower part of this mounting that is welded to the bulkhead can suffer the same fate. The base plate is easy enough to replace or tighten but for the welded bracket it's going to need some more work. The way to stop this elongation damage starting is to keep the steady rod assembly in good condition all the time, once the engine starts to move a little the damage begins.

Vitruvian, yes you can easily do these jobs to your Mini with basic tools and precautions. Most things on a Mini are fairly easy to do at home if you have to.

[Leonard]

i was talking to him last night on msn. he said its a fast knocking, like a machine gun. Big ends probably.