abdr500

iTrader: (1)

I fitted new hydraulic lifters in a m8s cosworth head that was off but a few valves are staying open they do shut but after 30 min what could this be

Eagle

iTrader: (2)

might be worth taking em out again and making sure they are full of oil.. might have air in em and thats keeping em open

abdr500

iTrader: (1)

well we took them out and refitted them in the same place only this time we left them to soke in oil and they held the valves open .can they be faulty

pee vee

they held the Valves open!?
surely them valves are now bent mate???

Alvyn

iTrader: (1)

IT says the head is off m8

xr4x4rs

iTrader: (5)

thats confused me what you are saying

so the heads off

you have fitted new lifters but the valves are staying open

are the cams in place

surely just fitting a lifter to a head with no cams in isnt going to open the valve unless you can push down on the valve spring

S1

Is the head on or off?

abdr500

iTrader: (1)

the head is off and the cams are bolted down they do shut if you take cams out and as for bent valves there is none I have striped and checked it I even replaced with another set to make sure and still
most likely the lifters are faulty and will need replacing

xr4x4rs

iTrader: (5)

or how about its on cam?

why not fit the cams back in and turn the cams until all the valves are closed

i dont know what its supose to be on tdc wether the valves are open or all closed

but maybe if you turn the cams the valves will close

abdr500

iTrader: (1)

xr4x4rs
m8 its still open even when the cam is off lift so the cam lobe is facing totally opposite the lifter

tracktoy

measure the lifters, sounds like they are too thick

S1

If the valves are not bent then the only other possibility is the lifters are jamming in the head. Did you lube them up correctly when they were fitted?

abdr500

iTrader: (1)

yes the are free and are lube nicely must be a dodgy set will replace them and see