carl.woolford

could anyone help, rebuilt version 2 sti engine with forge internals, now running up the engine produces a tappety noise, the tappets are in the head with rocker over the valves, i could not get these out when rebuilding. any surggestion.

kevin wrx

iTrader: (1)

i dont no if they r hydraulic tappets or manual adjustment but if manual they need adjusting if hydraulic then they need replacing due to wear

carl.woolford

they are hydraulic and they seem to be stuck in the head

merlin24

iTrader: (1)

That will be your problem then Carl, the hydraulic lifters should be free to pull out of the lifter bore's on the heads.
They should all be stripped and cleaned when removing the head,to remove the build up of old oil/sludge/tarnish - and it also allows the lifters to "pump up" correctly when the engine is first started up.

Mick

ZEN Performance

sounds like legacy heads ("rocker over valves") so they are even worse for being tappety. a set of 97-98 impreza heads with solid followers would be a sensible upgrade for the future.

Paul

carl.woolford

thanks for that, i had thought the heads might have been off a legacy but i dont know why these heads are on the car, if i were to fit the 97-98 heads i would have to change the inlet manifolds? plus i have to make some changes to the wiring would i not.

Cornelius

iTrader: (2)

When I rebuilt a 2.5 engine in my old MY96 scoob, it was very tappety, was recommended to use a good quality mineral oil rather than the semi synthetic I put in to run the engine in, once I dropped the oil and used mineral, the tappet noise went with in a few miles, done 500 careful miles then changed the oil for semi synthetic.

Maybe worth a try first as only cost around £20

carl.woolford

thanks thats what i probably do, just a bit of a kick in the teeth after rebuild