iv got a s2 rs turbo and its got a realy bad rattle its worse when i first start the car then after 2 or 3 sec's it dies down a bit,but gets louder when i rev the engine.i have replaced the tappets,it sounds like its comeing from the top of the engine at cam belt side.my mate said he had the same prob wiv his and it was the big ends.is there any way of telling which one it is. please help coz its killing me haveing her off the road.

 

could be severly worn cam lobes...

if the sound is coming from the top end of the engine

 

You can generally hear big ends on start up before you have full oil pressure like you have said and you then dont really hear them (Unless there is no oil pressure!!) until about 2.5k upwards where you will get the rattling sound as a bit of load goes on them.

Again if youve just changed the Followers and not the cam at the same time then sometimes the cam will scrub the bottom out of the follower and cause a tapping sound but this will usually generate a misfire aswell.

More than likely if its a CVH then it will be the big ends but you never know!

Hope that helps - im sure if you mentioned a bit more about it then some more techinical guys might be able to help you to diagnose it

 

has it ever ran very hot or overheated etc ?

 

Sounds just like mine does at the moment get your wallet out REBUILD time

P.S bung an oil pressure gauge in first just to check

 

yeah i have a oil pressure guage fitted,what should the pressure be? the rattle gets louder when i rev the engine from stand still. and the oil guage does hessitate 4 a second or so then shoots up.and no its never ran hot or over heated.also iv just been out 2 the car and noticed that 2 of the wires have broke on the throttle possition sensor,(could this be y its lost power.

 

Mine too , still took the opportunity for 200bhp+ rebuild at the end of May!

 

Think it should be 1bar on tick over and 2bar at 2000rpm at 88 degrees but not 100% will check today and post later to confirm

 

This sounds like what my m8s car did its sounded like tappets so he got a new kent cam and lifters......(as you do )
it wernt that then put new rings pistons in to remove piston slap (as you do again )
surprise suprise it wernt that, then put new bigend shells in it............... it wernt that either so he swapped the lump and gave it to me for nowt.
i removed the only thing he didnt swap?????
the mains had become worn due to poor oil pressure from a blocked oil strainer/pick up pipe so 25 quid set of mains and it was back on the road and quiter than ever (bargain )

 

lucky bugger!