had a rattle on my top end of my s2 rst escort, so went out and changed the cam to a new kent cam cvh 34, with a new set of tappets, oil pressure reads 20psi on idle and over 40psi when revs are at 3000rpm, and there is still a similar tapping noise coming from the top, any ideas why?

 

when i put new valve stems seals in my s2 it took few miles to quieten back down.
are the rockers definitely tite?
a top end rattle can also sound very similar to damaged shells in bottom end.my mate changed eveything in the head ,then found it was knackered shells

 

Is this after 30 mins of driving?

Yes it can, had this myself But his oil pressure should be low if it's shells also.

Did you run the cam in properly?

 

as karlos says,was cam run at 2krpm for 20 mins,if not then time for a new cam

also may be the small ends

 

Cam bearings? And yes Karlos is right 20mins at 2000rpm.

 

New kent set too..

http://s186.photobucket.com/albums/x...urrent=025.flv

 

Nasty!
Was it not run in properly, or was it low oil pressure?

 

Proper run in and burton high power oil pump. Shop installed it and timed. After 20 km rattling..

 

cam was run in properly 20mins at 2500rpm, is it a dodgy cam? the car was warmed up first before reading pressure gauge. 20psi at idle just over 40psi when revved at 3000rpm. the pressure never dropped. help me please!!!!!!!!!!!????????????????

 

definitley sounds like top end to me.

 

always wondered what neighbours must think when you are running in a cam. RS Turbos are usually plenty loud enough at idle let alone at 2krpm for 20 mins lol

 

I have know a few people who have built N/A cvh`s and when running gave a top end rattle but only when it was slighlty warm to hot. After weeks of faffing about, it was discovered that the pistons being rough cast on the crown had a little more meat than normal. As the piston heated and expanded it was kissing the combustion chamber, this sounded identical to a noisey cam

 

I've had the same thought! lol

How the fuck did you manage to figure that one out?? Good effort!
Are you sure it wasnt that the head had been skimmed one too many times?

 

who squezzes there tappets before installing, f*ck i didnt could this be the prob if so what damage have i done, should i try squezzing them in with a vice .+++????????????
i think my heads going to pop soon mine and the bloody cars.

 

Oh no, you dont need to do this, a good soak overnight is all thats needed if fitting new jobbies.

 

Na, it was quite obvious once the head was off, it must have been a poor batch of pistons that hadnt beed dressed properly on the crowns, was a pain in the arse removing the unwanted material with the engine still in the car