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Thread: 300TDI into 6cyl SIII 109

  1. #1
    Join Date
    Oct 2010
    Location
    Garvoc, South West Victoria
    Posts
    680

    Question 300TDI into 6cyl SIII 109

    Is anyone familiar with the modifications that are needed to install a 300Tdi engine with either a stumpy R380 or a standard SIII gearbox into a SIII engine bay originally fitted with a Rover 6cyl petrol engine?

    LRT

  2. #2
    Join Date
    Jan 1970
    Location
    under a rock, next to a tree, at Broadmarsh
    Posts
    6,738
    Can be done, you will need to change the bell housing to the one with the one hole in the housing at centre top and watch out for the layshaft bearing size as the later boxes had a stronger layshaft.

    The mounting points for the side of the engine need to be looked at, cut the ones from the donor's chassis and weld them in place after taking careful measurement for their placement.

    Look at the clearances between things like the side of the 300TDi engine, injector pump, turbo and the footwell, steering box and steering relay.

    You will need to modify the top of your fuel tank for a return for the diesel spill line and fit diesel filters into the pickup line.

    With the clutch the 300 TDi uses the same throwout bearing as a series three, it's best to stay with the stronger 300TDi clutch, so to get around that maybe look at using a bell housing and clutch mechanism from a four cylinder S3, otherwise use a S2A diesel clutch.
    The later S2A and S3 bell housings do interchange.
    With the gearbox input shaft to crankshaft bush, the bush has remained the same from the 80" right through to the TD5, with the exception of the V8 .
    .
    Last edited by wrinklearthur; 13th June 2013 at 10:44 AM. Reason: throw not through, some mumbo sorted

  3. #3
    Join Date
    Jan 1970
    Location
    Narre Warren South
    Posts
    4,487
    There's a lot of info on the InterWeb but you'd have to read through it to see what applies to your situation. I've never done one so I can't provide first hand info.
    I did find somewhere the exact details of the mounting to a Series gearbox but cannot find it at the moment.

    300Di Conversion
    200tdi 300tdi 300 200 tdi land rover defender conversion engines
    300TDi Conversion. Apologies in advance
    Land Rover Owner • View topic - Series lll 300TDI engine conversion..
    The 300Tdi Engine | Land Rover Expedition



    Colin
    '56 Series 1 with homemade welder
    '65 Series IIa Dormobile
    '70 SIIa GS
    '76 SIII 88" (Isuzu C240)
    '81 SIII FFR
    '95 Defender Tanami
    '60 SII 109 ute (gone)
    Motorcycles :-
    Vincent Rapide, Panther M100, Norton BIG4, Electra & Navigator, Matchless G80C

  4. #4
    Join Date
    Oct 2010
    Location
    Garvoc, South West Victoria
    Posts
    680
    Hi wrinklearthur,

    Thank you for your prompt and informative response.

    LRT

  5. #5
    Join Date
    Oct 2010
    Location
    Garvoc, South West Victoria
    Posts
    680
    Hi Colin,

    Thank you for the links.

    I look foreword to reading them.

    I am sure they will be interesting and helpful.

    LRT

  6. #6
    Join Date
    Apr 2007
    Location
    Gold Coast
    Posts
    696
    Hi LRT just wondering if you are doing this conversion still?
    I am currently in the process and have found the 6 cylinder is a different fit to the 4 cylinder as the gearbox is mounted further back to allow the original 6 cylinder to fit.
    The problem is the 300 TDI sits further back closer to the fire wall and their is not enough room for the turbo.
    Wondering if you or anyone else has any pics of a 300 TDI fitted to a 6 cylinder and how they got around this problem. I have some ideas but want to put the feelers out there first.
    Shepp

  7. #7
    Join Date
    May 2013
    Location
    Elliston SA
    Posts
    36
    Hi I`ve got a daihatsu 2.8 in a six chassis and the engine is squeezed right bak I had to cut the firewall a bit for the exhaust manifold and move the heater across a bit for the intake manifold but its still tight and it has no turbo. My idea is that a longer lt77 or lt95 gearbox would push the engine forward a bit as in a stage 1 V8 though an adaptor plate would be needed for the V8 bellhousing( I don`t know the 300tdi bell housing length) With hindsight I would have preferred this option as series gearboxes are at their limit especially if towing. My next project might be something down these lines perhaps....Anyone got a daihatsu to V8 adaptor?

  8. #8
    Join Date
    Apr 2007
    Location
    Gold Coast
    Posts
    696
    I had to cut firewall a little but once that was done it fit beautifully .
    Shepp

  9. #9
    Join Date
    May 2012
    Location
    Darwin
    Posts
    421
    Hi,
    Nice to see that someone has started a thread instead of me regarding this process!

    I am preparing to sell my roadworthy series 1 disco so that I can use my unregistered series 1 disco as a donor for exactly what you are proposing here.

    I understand that it is best to use the 4 cylinder petrol series 3 because the bell housing will bolt to the 300tdi. This also saves the other mentioned issues such as the firewall shunt of the repositioning of gearbox mounts.

    The issue I am facing is that 4-cylinder petrol series 3's are in limited supply in the NT. Let alone ones for a respectable price.

    I have subscribed and look forward to your progress. I have been given a max 2yr time limit to complete the job. I want stage one done relatively quickly though. Stages two and three can be a work in progress.

    Are you going to use the 300tdi alternator?
    Are you going to retain the 300tdi power steering pump?
    Are you going to retain the 300tdi a/c?
    What will you do for the drivers side engine mount?

    Cheers, Adam.

  10. #10
    Join Date
    Apr 2007
    Location
    Gold Coast
    Posts
    696
    Ok just to clarify. I had 6 cylinder series 3 matched it to the original gearbox using 200 TDI bell housing. Didn't move gearbox mounts but did fit new engine mounts. Slight trim of firewall to accommodate turbo.
    Very neat fit and heaps of room up front I fit electric thermo fan.
    Thread on GCLRO under Rambover in members rides if you want a look. Happy to post up more pics if something specific you need to see.
    Shepp

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