Tappet screws
Posted: Mon Jul 08, 2019 10:42 pm
Hi all
Does any one know if new tappet screws/bolts can be bought new .
The reason i ask is i was doing the tappet gaps after a de-coke as well as grinding the valves and seats, i was having difficulty getting a gap even though i could move the follower up and down, so took out the valve and spring i was having a problem with and took out the adjuster screw/bolt, someone before had a problem with wear in the shape of an indentation caused by the valve and they had filed the top of screw/bolt and it has worn a indent again.I assume that filing the bolt top went through the hardened surface .i had a spare parts engine and took the best of the bolts to replace the filed one they all had indent but not as bad as the others.If new ones cant be got what is involved with grinding the screws/bolt head flat and re-hardening them . Or has someone had some new ones made in the past. I also noticed that there was very little adjustment available as if the valves were too long is that possible,the valves are not sunk into the block. the block has been bored +40 in the past and i assume new valve were fitted . i think there were numbers on the end of the valve shaft but will have to wait till tomorrow to look.
Sorry its a long subject by the way.
Ian
Does any one know if new tappet screws/bolts can be bought new .
The reason i ask is i was doing the tappet gaps after a de-coke as well as grinding the valves and seats, i was having difficulty getting a gap even though i could move the follower up and down, so took out the valve and spring i was having a problem with and took out the adjuster screw/bolt, someone before had a problem with wear in the shape of an indentation caused by the valve and they had filed the top of screw/bolt and it has worn a indent again.I assume that filing the bolt top went through the hardened surface .i had a spare parts engine and took the best of the bolts to replace the filed one they all had indent but not as bad as the others.If new ones cant be got what is involved with grinding the screws/bolt head flat and re-hardening them . Or has someone had some new ones made in the past. I also noticed that there was very little adjustment available as if the valves were too long is that possible,the valves are not sunk into the block. the block has been bored +40 in the past and i assume new valve were fitted . i think there were numbers on the end of the valve shaft but will have to wait till tomorrow to look.
Sorry its a long subject by the way.
Ian