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Thread: 300tdi vacuum pump fix

  1. #11
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    Here is a link to another post....But still no Ace Fix anywhere.........I think I will just take the thing off then work out what bolts I need then go shopping.....

    http://www.aulro.com/afvb/showthread...ght=vacum+pump

    Also can you just use goo to seal it up again instead of stuffing around making the very skinny gasket? Knowing me I will just about have it made then I will cut it and start over..... Would need to let it go off over night of course......

  2. #12
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    Quote Originally Posted by barjop View Post
    Thanks, did you have any troubles doing this? Also how has it gone, no recurrences or other problems created by doing this.
    No trouble doing it. It was already out of the car when I got involved. I haven't heard back as to whether it was successful but I will ask.

    Ron
    Ron B.
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  3. #13
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    Vacuum Pump Repair

    I successfully replaced the loose rivets with stainless nylock screw/nuts and sealed the welsh plug with a 'Silaflex' compound recommended by my local bolt supplier. Obviously I thoroughly cleaned the area with a spray for such purposes before application. That was over 150,000km ago and the vacuum pump has not lost a drop of oil since.

    Kerry (Darwin)

  4. #14
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    Quote Originally Posted by loanrangie View Post
    If your welsh plugs are leaking oil you have serious problems
    Quote Originally Posted by Kerry View Post
    I successfully replaced the loose rivets with stainless nylock screw/nuts and sealed the welsh plug with a 'Silaflex' compound
    Quote Originally Posted by Leo109 View Post
    Hi Guys,

    Good info on dismantling and re-assembling the pump body but surely there's more to it than that? I've read elsewhere that it's the welsh plugs that the oil often leaks from and that's where it seems to be coming from on mine too.
    Welch! Welch! WELCH! WELCH!!!

    Ron
    Ron B.
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    2003 L322 Range Rover Vogue 4.4 V8 Auto
    2007 Yamaha XJR1300
    Previous: 1983, 1986 RRC; 1995, 1996 P38A; 1995 Disco1; 1984 V8 County 110; Series IIA



    RIP Bucko - Riding on Forever

  5. #15
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    Quote Originally Posted by p38arover View Post
    Welch! Welch! WELCH! WELCH!!!

    Ron
    An gode spelle cheack woould bea hanndy her Ron

  6. #16
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    Quote Originally Posted by p38arover View Post
    Welch! Welch! WELCH! WELCH!!!

    Ron
    any your point is?

    hahaha

    love it......
    1998 Discovery 300TDi Manual SE7
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  7. #17
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    Quote Originally Posted by Leo109 View Post
    Hi Guys,

    Good info on dismantling and re-assembling the pump body but surely there's more to it than that? I've read elsewhere that it's the welsh plugs that the oil often leaks from and that's where it seems to be coming from on mine too.

    So, once you get it apart, what else has to be done and what parts do you use? Or was it just leaks from the rivetted join you needed to fix? Thanks.
    Hi, No problem with the welch plug either. I was able to buy one which seemed slightly larger and whilst I felt I had to be careful putting it into the alloy housing it hasn't leaked since. I have a feeling it was 7/8 inch but wouldn't swear to it.

    I took the unit apart as described by others (drill and punch), replaced the offending welch plug, reassembled with the original rubber ring and loctite sealer and metal thread screws.

    Have done a few and the only issue I can see is if the case hardening on the follower for the cam is damaged. I suggest you then toss the unit away.

    Cheers

    Jim

  8. #18
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    I was at KLR Auto on Friday and I noticed on in the bin. I asked about it and Brad said they tried repairing them but it's only temporary as the one-way valve in them fails and that's why they leak.

    I might grab it tomorrow when I'm up there and will pull it apart. (I can always use it as a spare for the daughter's 300Tdi).

    Ron
    Ron B.
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    2003 L322 Range Rover Vogue 4.4 V8 Auto
    2007 Yamaha XJR1300
    Previous: 1983, 1986 RRC; 1995, 1996 P38A; 1995 Disco1; 1984 V8 County 110; Series IIA



    RIP Bucko - Riding on Forever

  9. #19
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  10. #20
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    I very belated footnote to this fix...

    I did not worry about finding TDC before removing the pump. Once out, I kicked the engine over a few times and watched for the lobe of the cam in the engine that drives the pump to be on its low side. This allowed the pump to refit easily.

    This might save someone the time of finding TDC etc...
    '95 110 300TDI, F&R ARB Lockers, Twine Shower, Aux Sill Tank, Snorkel, Cargo barrier, 9 seats, swingaway wheel carrier, MadMan EMS2
    '85 110 Isuzu NA 4BE1 3.6l Diesel, 0.996 LT-95, Rear Maxi (SOLD)
    '76 SIII 109" Nissan ED33 5-SP Nissan GBox (SOLD)

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