300TDi rebuild mistakes. I hope this may help someone - Page 2





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  1. #21
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    Default Re: 300TDi rebuild mistakes. I hope this may help someone

    I did some reading up before I did my"P gasket". The metal one is recommended but all surfaces must be clean and there should be a thin layer of sealant applied to both surfaces.
    '07 Land Rover Defender 110 TDI 300 Kalahari (Meisiekind²)
    '84 Land Rover Defender 110 V8 4-speed Hardtop (Meisiekind) Sold after 12 years of fun and hard work.
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  3. #22
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    Default Re: 300TDi rebuild mistakes. I hope this may help someone

    Trust the P Gasket to generate debate. I'm pretty convinced though on my motor it's the Welch Plug dripping slowly under pressure because the coolant only starts to show 3/4's of the way down the front of the block not under the P Gasket.
    I'll do it tomorrow. It's bloody humid here today and I'm all sweated out.
    Last edited by Peppercorn; 2019/03/13 at 09:49 AM.

  4. #23
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    Default Re: 300TDi rebuild mistakes. I hope this may help someone

    Quote Originally Posted by Peppercorn View Post
    Trust the P Gasket to generate debate. I'm pretty convinced though on my motor it's the Welch Plug dripping slowly under pressure because the coolant only starts to show 3/4's of the way down the front of the block not under the P Gasket.
    I'll do it tomorrow. It's bloody humid here today and I'm all sweated out.
    Hi Peppercorn

    leaking so far down, most probably the welch plug. Good luck, it is a sh#t job
    George Bosch
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  6. #24
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    Default Re: 300TDi rebuild mistakes. I hope this may help someone

    Quote Originally Posted by Peppercorn View Post
    Did you use the all metal gasket or the paper one??

    There seems to be 2 trains of thought on this one. Some refuse the metal gasket and will only use the paper one whereas the metal one makes more sense to me in the long run.
    Hi Peppercorn

    the paper gasket. It will only develop a leak again if one of the mating surfaces is warped (waterpump housing).
    George Bosch
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  8. #25
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    Default Re: 300TDi rebuild mistakes. I hope this may help someone

    Well, I was right, it was the Welch Plug leaking and not the P Gasket. Easy enough job to remove the housing and get to everything I needed to.
    Waiting on parts now.
    Do you know I replaced 4 x Welch Plugs when I had the engine out and I cleaned up the cavities really well, using a wire brush on a drill. I smeared the Plugs with Permatex and made sure they were all inserted evenly and all 4 of them leaked. Not badly but annoyingly dripping under pressure.

    I removed the 3 on the side of the motor earlier in the week and replaced them using Stag and allowed the Stag to set overnight before filling the engine with coolant and they are all fine now.
    This is the last one leaking so, I'll get the Stag out tomorrow and seal the bloody thing.

    HGBosch, I'm surprised you chose the paper gasket. I use the metal one with a smear on both sides of the gasket compound that LR uses for a sump gasket on the TDi's.

    Never had an issue providing you pull it down evenly when tightening the housing down. I've heard those paper ones can give way over time as they go hard and brittle.
    Last edited by Peppercorn; 2019/03/14 at 10:38 AM.

  9. #26
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    Default Re: 300TDi rebuild mistakes. I hope this may help someone

    Quote Originally Posted by Peppercorn View Post
    Well, I was right, it was the Welch Plug leaking and not the P Gasket. Easy enough job to remove the housing and get to everything I needed to.
    Waiting on parts now.
    Do you know I replaced 4 x Welch Plugs when I had the engine out and I cleaned up the cavities really well, using a wire brush on a drill. I smeared the Plugs with Permatex and made sure they were all inserted evenly and all 4 of them leaked. Not badly but annoyingly dripping under pressure.

    I removed the 3 on the side of the motor earlier in the week and replaced them using Stag and allowed the Stag to set overnight before filling the engine with coolant and they are all fine now.
    This is the last one leaking so, I'll get the Stag out tomorrow and seal the bloody thing.

    HGBosch, I'm surprised you chose the paper gasket. I use the metal one with a smear on both sides of the gasket compound that LR uses for a sump gasket on the TDi's.

    Never had an issue providing you pull it down evenly when tightening the housing down. I've heard those paper ones can give way over time as they go hard and brittle.
    Hi Peppercorn

    remember it was a weekend job and I had the paper gasket in stock. I only work with torque wrenches on engines. for the small stuff 2Nm - 25Nm I use a Hazet one, which has served me well for many years now. Had it checked last year and was still within spec.

    https://www.amazon.de/Drehmoment-Sch.../dp/B001C9XJ7O

    Flippin expensive to buy but Hazet quality does not come cheap.
    George Bosch
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  11. #27
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    Default Re: 300TDi rebuild mistakes. I hope this may help someone

    Quote Originally Posted by hgbosch View Post
    Hi Peppercorn

    remember it was a weekend job and I had the paper gasket in stock. I only work with torque wrenches on engines. for the small stuff 2Nm - 25Nm I use a Hazet one, which has served me well for many years now. Had it checked last year and was still within spec.

    https://www.amazon.de/Drehmoment-Sch.../dp/B001C9XJ7O

    Flippin expensive to buy but Hazet quality does not come cheap.
    Hi George,

    May I ask where you had it checked / calibrated.

    I have a feeling my wrench is out and want to get it checked.

    Sorry for the thread Hijack

  12. #28
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    Default Re: 300TDi rebuild mistakes. I hope this may help someone

    Quote Originally Posted by nedge View Post
    Hi George,

    May I ask where you had it checked / calibrated.

    I have a feeling my wrench is out and want to get it checked.

    Sorry for the thread Hijack
    Hi Nedge

    at the importers in Switzerland. Here in SA contact the Distributors for Hazet, they should be able to assist you.

    Good luck!

    George
    George Bosch
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