someone please help i have a knocking sound from engine when ticking over . sounds like its coming from the block (louder underneath the car ) could this be the big end ?

 

Is it just when the car is cold, does the knocking increase in frequency with engine speed, what model year is the car?

More details needed mate.

NS04

 

all the time mate just started last night you can hear it on tick over then when engine speed is steady its a 99 uk model

 

Unfortunately the big end is a possibility, but its not the only one- there may be other less drastic causes. How many miles does it have on the clock, what oil and petrol have you been using? Was it driven particularly hard prior to the noise starting?

Talk to someone like David at API www.apiengines.com for an expert opinion

Best wishes,

NS04

 

it does have good oil in it and i use shell optimax 52.000 on the clock wasn`t driving it hard either

 

What is good oil? Are we talking Motul or Silkolene Pro S here? (that's the really good stuff) Most importantly, what grade are you using?

Best,

NS04

 

had oil changed about 1500 miles ago i can`t remember which one exactly but it was expensive !

 

Loose spark plug or lead?

 

can`t feel any leads loose will have to check plugs tomorrow thanks do you think a loose plug would cause it to stall coming up to junction ? this happened yesterday before the noise started .

 

does it get louder and quieter with varying load (not necessarily varying revs) -this would indicate probable big end failure. fingers crossed that it's not mate...

 

its hard to say but i don`t think it sounds louder under load but i stopped driving it as soon as i heard it thanks