Inlet manifold woes

Discussion in 'Mech Tech' started by scrooge95, Oct 15, 2017.

  1. scrooge95

    scrooge95 Moderator and piggy bank keeper

    Hmmm, not a chance of vacuum, and yep, nice oily air.
    I guess there's only two options for connecting the pipe at the top of the oil bath - either to the left or to the right. Had a quick google to see if it is definitely one and not the other - vzi came up with this which kind of implies mine is correct, but possibly might not be....
    image[1].jpg
    So if I swap the pipes left to right, and give it another suck I'll hopefully get vacuum and know that mine is just one of those odd one's that's the wrong way round? Still no vacuum and it's the actuator that's kernackered?
     
  2. I don't think it matters, tbh. The two connections are to a simple thermo-valve thingy that opens or closes according to air temp. Pull the pipe off going to the "funny round thing". That's the actuator. Suck. If it's good, you'll get tunnel vision and your ears will implode :). If it's duff, you'll be able to keep sucking, which means the actuator diaphragm has split.

    Quicker still, pull off the pipe from the manifold, bung the end up (golf tee is handy) and see if your engine runs ok.
     
    nicktuft likes this.
  3. scrooge95

    scrooge95 Moderator and piggy bank keeper

    It's no wonder my neighbours think I'm mad!
    Right, here goes....
    Swapping the top pipes round makes no difference: with the pipe from the inlet manifold connected to either the right or the left connection at the top of the oil bath, no amount of sucking is producing a vacuum. Summit wrong here.
    But sucking the pipe that is connected to the actuator / flying saucer at the bottom, does indeed make my eyes bulge, my ears ring, and the little flappy thing inside the trumpet lift up. I think my diaphragm is all present and correct.
    I'm not sucking anything else tonight now. (I can hear you all sniggering ;))
     
    nicktuft, snotty and Flakey like this.
  4. You’ve got a leak in the oil bath somewhere then
     
    scrooge95 likes this.
  5. Surely if you have a vacuum leak your engine would stall every now and then and especially when coming off the motorway.

    I spray carb cleaner at all cracks and that finds leaks very fast. One crude way i know my vacuum is good when driving is when you rapidly pump the brake pedal the revs will increase. If it drops I must have a leak.

    My bet is because your problem needs a good mechanic. You may even have a bad spark. It is quite easy to damage a lead messing. Poor starting and running could be caused by many things and it may be a coincidence that it happened when you had the work done.
     
  6. davidoft

    davidoft Sponsor

  7. scrooge95

    scrooge95 Moderator and piggy bank keeper

    I'll have to do it tomorrow now, for fear of starving to death.
    What should / shouldn't happen if the pipe is blocked off? And I guess I need to block the hole in the inlet manifold at the same time?
     
  8. Does your other half know ?
     
  9. The engine should run normally. Just pull the pipe off (from the air cleaner) and bung the end up.
     
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  10. davidoft

    davidoft Sponsor

    Just block the end from the manifold, it that’s your issue it will run better
     
    snotty and scrooge95 like this.
  11. You are a marval of a woman.
    As a new owner trying to develop enough knowledge and skill to keep Alma running, I refer to your posts often for inspiration and help.
     
    snotty, Dubs and paradox like this.
  12. scrooge95

    scrooge95 Moderator and piggy bank keeper

    Ha ha thanks, I think! But it’s the folk on here that are the marvel, and the wonderful resource that is TLB: I doubt I would still have my van if it wasn’t for here, I would have floundered and probably given up, out of my depth.
    I know it’s been said a number of times on your postings about Alma, but Techenders really is worth the effort of getting there, and again it is one of the main reasons I don’t end up in a darkened room, gently rocking in a corner, gibbering about big ends, air flaps, and whether SAE30 oil would be good for the roast potatoes at Christmas
    It’s nice to put faces to names, and hopefully helps when I ask slightly panicked questions on here, that I’ve had a drink and a laugh with a good few of those kind enough to reply.
    Keep going with Alma, it’s invariably worth it when you are behind the wheel, as I’m sure you have found by now
     
    Dazza, pkrboo, art b and 4 others like this.
  13. Baysearcher

    Baysearcher [secret moderator]

    With some of the Techenders lot, I feel it'd be better not knowing.....
     
    Dazza, pkrboo, CollyP and 5 others like this.
  14. I’ve seen a few posts from you full of positivity and niceness
    Please keep it up it’s a welcome change
     
    Dazza, art b and Luca like this.
  15. you make the rest of us look pretty ...:hattip:

    especially in the mornings :eek:
     
    Flakey and Baysearcher like this.
  16. I was under the impression that this is precisely how people behave at tech enders - particularly those personages who bring intoxicating beverages in tin cans...
     
    scrooge95 likes this.
  17. CollyP

    CollyP Moderator

    How the flip would I know??? :)
     
  18. CollyP

    CollyP Moderator

    Ftfy
     
    scrooge95 likes this.
  19. scrooge95

    scrooge95 Moderator and piggy bank keeper

    If I can provide a little entertainment along the way.....!

    (were you actually up by then?? :p)
     
  20. CollyP

    CollyP Moderator

    Was going to write “no, but I was watching from my bed” and then realised it sounds well creepy. Good job I didn’t type it!!! :)
     

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