[njv]

hello
well it looks like my engine is dropping a valve on the number one cylinder .

2110cc t4 engine and the bus sqr port heads i used checked out just fine looked ok to go till i got the money toghether for bigger valve heads this year.

well idle has gone to pot cleaned my dells and the mixture screw closes the cylinder down completely so fuel is still getting thru.

compression test gave me 11 bar 159psi on 2 3 4 i had 10bar 145 psi on 1 it was set at 9.3-1 so its good .

did the dirty running the engine off with the valve cover removed and the valve on 1 looks to be opening and closing ok rocker gear is a little worn but should be ok! very messy job mind.

need to make a screw in fitting to do a leak down with my compresor after getting it to lets say 50 psi how long would a good cylinder take to get down to 10 psi anybody any good figures for doing leakdown testing?

pushrods are cromoly and have been set cold so they can be just turned between fingers lash hot seems about right .15mm .

still need to check the lifter and check the lifter and cam brand new web 163 matching lifters broke in properly.

oil pressure is superb .

o yea spark be good tryed new plugs anyway just to make sure.

after running at speed static will idle properly for a while then the cylinder dies pulling the plug lead makes no difference spark is still there.

what else can i check before i tear it down and look at the head internals.

sticking valve or dropped seat?