S3 engine knocking

HI,

My 2.25 petrol 3MB engine has developed a knocking noise once the engine
gets warm. It sounds sweet as a nut when cold, but after a few mins theres
a rumbling sound when driving, and when idling there is a knocking noise,
which speeds up when the throttle is pressed. Power doesnt seem to be any
less when on the road, but it doesnt sound too good.

As its currently dark and raining, and my garage is full, I havent actually
investigated yet, but does anyone know what it might be? Someone suggested
my big ends may have gone, so I suppose its new engine time..or is it?

TIA.

Paul

Pacman wrote:

> As its currently dark and raining, and my garage is full, I havent actually
> investigated yet, but does anyone know what it might be? Someone suggested
> my big ends may have gone, so I suppose its new engine time..or is it?

Big ends sounds about right from your description. If it's not an oil
burner you could drop the sump off and slip a new set of shells in if
the crank looks ok. It wouldn't be hard or expensive to do and should
solve the problem.

--
EMB

In news:[email protected],
Pacman <[email protected]> blithered:
> HI,
>
> My 2.25 petrol 3MB engine has developed a knocking noise once the
> engine gets warm. It sounds sweet as a nut when cold, but after a
> few mins theres a rumbling sound when driving, and when idling there
> is a knocking noise, which speeds up when the throttle is pressed.
> Power doesnt seem to be any less when on the road, but it doesnt
> sound too good.
>
> As its currently dark and raining, and my garage is full, I havent
> actually investigated yet, but does anyone know what it might be?
> Someone suggested my big ends may have gone, so I suppose its new
> engine time..or is it?
>
> TIA.
>
> Paul

Possibly mains or maybe even (cheaper) an engine mount lost its rubber.

--
The enemy of my enemy is my fiend?

If at first you don't succeed,
maybe skydiving's not for you!

>
> Big ends sounds about right from your description. If it's not an oil
> burner you could drop the sump off and slip a new set of shells in if
> the crank looks ok. It wouldn't be hard or expensive to do and should
> solve the problem.
>
What if I said it WAS an oil burner?

P

Pacman wrote:
>>Big ends sounds about right from your description. If it's not an oil
>>burner you could drop the sump off and slip a new set of shells in if
>>the crank looks ok. It wouldn't be hard or expensive to do and should
>>solve the problem.
>>
>
> What if I said it WAS an oil burner?

Then it's probably not worth just doing shells on - I'd either look for
a replacement or rebuild it properly.


--
EMB