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Hugo Derrick
Username: hello

Post Number: 10
Registered: 08-2006
Posted on Tuesday, October 14, 2008 - 01:47 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Chaps -

I came across this water pump failure mode with my R3MCD; I thought it worth sharing.

I'd noticed the engine gradually running hotter & hotter; so much so that lifting the lid on the engine box resulted in a little more power (indicated by an increase in charging rate)!

I focussed my attention on the water pump; watching the suction pipe, I noticed a little water was displaced out of the pipe before the inlet valve had a chance to close; clearly the through put was suffering.

Whipping out the valves & valve caps, I noticed the bleeder hole that allows the valve to move axially without hydraulic locking was almost completely blocked, promoting the very sluggish valve movement.

Cleaned out with a suitably sized twist drill, the engine is now back to its previous performance!



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