[paulllewellyn1234]

Hi, so it looks like the juddering has passed with a week of driving (good call there). But....

Driving on a long journey today there were a couple of times when it felt like the engine was straining and underpowered and after pulling up a long hill there was a definite squeeking sound.

I'm wondering if the new pump is offering a lot of resistance to the aux/alternator belt and maybe causing the engine some extra load. I'd heard that a seized pump could actually stall the engine?!

Is it possible for the hydraulic circuit that the pump drives/pressurises can become blocked thereby giving a load of back resistance to the pump? I wonder if thats what made the original pump blow its end cap off?

Many thanks, Dave

Hi, very old this i know, but i have had the same problem on my van with the cap blowing off on two occasions in the last two years. Did you find out where the pressure relief valve was located eventually, cant find anything on it on google
cheers
paul