That’s very good of you to offer but I’ve a spare block here I can swap bits out of as needed. As for the pump, I’ve a few spares ones but only the one fitted is working properly. I think I’ll try a rebuild kit for one of the spares before spending a few hundred on another pump but I’ll bare you in mind should I need another.
Just while I’m waiting on some 8mm hose I pulled these NRVs from the spare block I have. Of the three valves in it only one looks to have a decent cone on it (b). Of the three, which do you think is useable as I’m going to check my valves over the weekend and might use one of these?
Apart from the fact that they are fitted with red O rings which IMO are not good, all the cones look acceptable.
I’m not sure what your referring to there, is that inside one of the silver plungers under one of the black solenoids? If so, which would possibly be to blame, looking at the diagrams and advice on here surely both the inlet and exhaust would have to fail to see this problem? I’m also not seeing any bubbles of escaping air around the bases of the solenoids.
That’s great, I thought two of them looked ruined as the shape isn’t perfect triangle I’d imagine it needed to be. How badly misshapen do these need to get to cause a problem?
It's when they get a ridge around the circumference of the cone that they cause a problem as this can cause the valve to hang up and not close. The cone is only a guide as long as it's a fairly smooth taper, they are OK. I have a actually successfully smoothed one off in my lathe.
That’s good to know, thanks. On the original problem the balloon I fitted to the exhaust silencer has some air in it, nothing huge but more than when it went on so there’s a leak in the valve block, just just to work out what
Unless you disabled the EAS by pulling the relay, that may not indicate a leak as the EAS self levels downwards every 6 hours which may release air.That’s good to know, thanks. On the original problem the balloon I fitted to the exhaust silencer has some air in it, nothing huge but more than when it went on so there’s a leak in the valve block, just just to work out what
If it self-levels downwards, the balloon inflates quite a lot !!
That rather depends on the amount of leveling does it not? My one fitted with Arnott's barely moves in the space of 2 weeks.
I have not tried it but I would be surprised if the EAS valves on the P38 would hold a vacuum and even if they did it would not prove that they would hold pressure.
Small pin hole leak in the tank due to rust??
Not that I can see, the block is in great shape as are the various bits and pieces. The last time the block was apart I cleaned the whole thing so I’d hopefully have spotted something.
I’m wondering if that’s a possibility. I took the whole tank back to bare metal a while ago and covered it in por15, I might remove it and try to bastardise together some way to test it. Not sure how to go about that yet.
The NRV physically looked ok to me but unless there was something very wrong with it I maybe wouldn’t know. The conical shape of the top is perfect and all the seals used are the black ones from X8R.
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