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Paroak



Member Since: 16 Dec 2020
Location: South Wales
Posts: 2
United Kingdom 1987 Defender 110 300 Tdi CSW Masai Red
Rebores
I need to get a 300 TDi rebored asap. Was going to go with +20 thou but my son said why not get it rebored to 2.8l? Without any research, (YET) is it worth it, is there any real gain in power, loss in reliability? I currently run through a LT77 box but have the option of changing to a R380. Are there any gains in either options? I intend to travel and want reliability above performance but wouldn't mind gaining in fuel economy if possible. Do I want the Earth? Yes. Can I have it? It is up to you! Very Happy Don't forget to forge your dragons as you smell the roses along the walk of life.

Paroak
Post #873370 16th Dec 2020 9:56pm
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Blackhat90



Member Since: 31 Dec 2016
Location: Forfar
Posts: 86
Scotland 1995 Defender 90 300 Tdi HT Epsom Green
Needing a rebore? does it blowpast rings ?,, mines is on 380,000 miles and fine, As for the R380 box, yeh its a stronger box than the LT77,, and reverse is in the correct place, [ you dont hit rev ,when looking for 1st],,,economy ? you can fit a dicovery transfer box,, [higher ratio],, but not good for towing heavy trailers,,
Post #873929 20th Dec 2020 10:01pm
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LandRoverAnorak



Member Since: 17 Jul 2011
Location: Surrey
Posts: 11324
United Kingdom 
There's more to building a 2.8 than just re-boring it. They're also incredibly torquey and you'd really need to move to an R380 box for reliabilty. Darren

110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak

"You came in that thing? You're braver than I thought!" - Princess Leia
Post #873969 21st Dec 2020 11:44am
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Dinnu



Member Since: 24 Dec 2019
Location: Lija
Posts: 3410
Malta 2012 Defender 90 Puma 2.2 CSW Santorini Black
Were the bores measured for wear and found to be out of specifications to decide for a rebore?

I think the later LT77 were quite strong. My 1988 box is suffix E, which is not the strongest, but have a stronger reverse gear compared to suffix D! Only if I drive more backwards Rolling with laughter 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black
Post #873980 21st Dec 2020 12:56pm
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sako243



Member Since: 08 Jul 2014
Location: Wales
Posts: 1218
Wales 1994 Defender 110 300 Tdi CSW Alpine White
The 2.8TGV which is what I assume you mean by boring out to 2.8 has a larger bore (ok you have that one ticked). Longer stroke crank (provides the extra torque to a certain extent) thus requires different pistons, rings, con rods, big ends, crank, bearings. The head and block if I remember correctly also have extra cooling channels (or rather they are not blocked off) but they may not be needed. There's also a different turbo if you're talking about getting a proper TGV setup. Ed
82 Hotspur Sandringham 6x6
95 Defender 110 300Tdi
Post #874017 21st Dec 2020 5:51pm
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