Hi Andy,
The followers are a little on the loose side in fact quite loose especially if rocked side to side. The hydraulic tappet pumps up with oil pressure so they should stay quiet when running but if they get crud inside then they either don't stay pumped up during the valve closed phase (lazy tappet) or they stay deflated (collapsed tappet) during valve lift, often accompanied buy a partial misfire. When collapsed the noise sounds deeper like a big end but faster if you get what I mean.
A lazy tappet might be revived but a collapsed tappet should be replaced imediately as it could spit out the follower causing a lot more damage.
For Info the engine oil supplied by Ford for engine testing and development when these were 'new' was Motorcraft 15w40.
Now they use 0w20 how times have changed.....
As for the Pierberg carb, the problems are with the choke system. Bin the choke flap and the module that operates it unless your using the roadster in the middle of winter.
BV.
Last edited by Big Vern : 9th July 2010 at 08:44 PM.
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