turblower

hallo peeps,

my car has just started to make like a knocking sound,when u rev the engine a little,the knockin goes but when it drops down the revs it knocks a little, then it goes again...the oil is on the minium so im going to top it up next week an hope is the not enough oil in the bloody thing..

turblower

any 1 know please????because im gonna be loosing a lot of sleep over this

cossieDavedree

sounds like you let it run low on oil and probably worn a big end bearing out.
Piston slap is common to the 2wds, and it happens when the engine is started from cold, Once warmed the slap goes.

Dan track ka

This has been on my mind also. While cleaning and painting my ZVH block i wiggled the piston at BDC and they moved side to side about 1-2mm and at TDC moved around 1mm side to side. It was a bloody cold day and im guessing that thermal expansion and some oil (oil was drained) would close the gap?

Just got me worried too.

turblower

it dont tap when its cold or anything,only when you rev it an the revs dro[p then it taps an knocks a bit.........thanks peeps it has let my mind of a bit....what oil do u recomend 4 a 500 bhp????

xr2wishy

iTrader: (2)

as said, sounds like big end bearing shagged, strip and sort.
piston slap is only there when cold till oil thins and piston expands a little. to tighten up the gap to the bores.

dan track ka: 1-2mm is quite a lot fellam i'd suggest getting an engineer to look at it, as it sounds like the bores a bit too worn, so either new oversized pistons or a fresh low mileage block with standard sized bores.

Dan track ka

Cheers, so if i got a new block i could use the 2.1 pistons ive already got?

cossie4i+

iTrader: (15)

Sorry to say it sounds like its on its way out then

You only get piston slap from cold, sounds like a diesel lol

Steve