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Blocking Camshaft followers (tappets)


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When rebuilding the cylinder heads of my V8, and checking the hydraulic tappets, a number of these turned out to be blocked; measured in this position it turned out to be in the highest position, compared to the tappets of which I could (finger) press the center plunger in.

Could it be that these tappets can block?

I love to learn!

 

Ruud.

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I doubt that there is anything wrong with the tappets. When `hard` it means that they are pressurised with oil.  The `soft` tappets are free of oil.  When re-installing used tappets, you will have a mixed bag of pressurised and empty tappets.

1996 Esprit V8, 1998 Esprit V8 GT, 1999 Esprit S350 #002 (Esprit GT1 replica project), 1996 Esprit V8 GT1 (chassis 114-001), 1992 Lotus Omega (927E), 1999 Esprit V8SE, 1999 Esprit S350 #032, 1995 Esprit S4s, 1999 Esprit V8 GT (ex-5th Gear project), 1999 Esprit V8SE ('02 rear)

1999 S350 #002 Esprit GT1 replica

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Hi Mike,

Thank you for your reply. I was able to drain the tappets trough the bore in the oil groove. Is it possible that the plungers are still under pressure even the tappets have been stored for 2 months. If these tappets fail, is it only by leakage?

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The tappets can hold pressure for a long time.

The tappets are a multi-part assembly, so things can break.

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It is possible to take them apart and re-assemble, although I have never needed to do that.

1996 Esprit V8, 1998 Esprit V8 GT, 1999 Esprit S350 #002 (Esprit GT1 replica project), 1996 Esprit V8 GT1 (chassis 114-001), 1992 Lotus Omega (927E), 1999 Esprit V8SE, 1999 Esprit S350 #032, 1995 Esprit S4s, 1999 Esprit V8 GT (ex-5th Gear project), 1999 Esprit V8SE ('02 rear)

1999 S350 #002 Esprit GT1 replica

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