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200 or 300 tdi as placement for 2.5TD

M

mikeb

Shifting Up
I want to replace my aging 2.5TD with either a 200 or 300 tdi engine. Which would be better and would I need to replace any other parts i.e gearbox or mountings?
 
For the simplest conversion, got for a Defender 200TDi if you can. It was so simple even I managed it... Just unbolt and bolt back in. Plus it's a bloody brilliant engine, light years better than the 2.5TD.
You could use a Disco 200TDi as above, but its more hassel and requires custom made stuff.
 
Didn't do it myself, but my 90 was originally a 2.5TD, and now has a Disco 300TDi in it, complete with the newer gearbox. Feel free to come and have a look if you want, though like I said, it was done by a previous owner so I don't know any details of the conversion :(
 
MIKESLANDY said:
Someone might tell me why they brought out the 300 tdi to replace the 200, arent they pushing out the same horses?
Mike
Click to expand...
I think they have the same torque (195lb/ft I think), but the 300TDi has about 5bhp more than the 200 if I remember correct (which I quite frequently don't ;) ) I think the 300 was supposed to be more refined than the 200 as well (if you can consider any LR diesel refined that is :D )
 
Discovery/RRC Tdis ahve a bit more power and torque than Defender units, but there is little difference between 200 and 300 in their given applications.

The main differences were the smoother, quieter running of the 300 by having lower CR and higher turbo boost, improved serpentine belt system and a crank shaft driven oil pump that will continue to deliver oil pressure even if the timin belt snaps, preventing seizure from timing failure and limiting the resulting damage.

Go for the 200 - it's a fairly straight swap. The 300 has different mounts from the 19J and will require chassis modification.
 
Looking at somre LR mags, at the back they give a run down of all Landrovers, sort of a buying guide. They state that the 200 and 300 Defender and Disco have the same BHP. I would forgive them if it were a general 4x4 mag covering all makes. How does the Disco have a couple of more horses, manifold layout less restrictive?
Thanks
Mike
 
MIKESLANDY said:
Looking at somre LR mags, at the back they give a run down of all Landrovers, sort of a buying guide. They state that the 200 and 300 Defender and Disco have the same BHP. I would forgive them if it were a general 4x4 mag covering all makes. How does the Disco have a couple of more horses, manifold layout less restrictive?
Thanks
Mike
Click to expand...
Defender engines are slightly de-tuned to improve their robustness for commercial, emergency service and military users. This applies to the V8, Tdis and TD5 alike.
 
Cheers Snagger, somethink to keep in mind when looking for a 200tdi to replace my old turbo motor. Just waiting for something to fail, turbo, head etc, but has been bullit proof for a lowly rated engine.
Mike
 
Don't be too eager to bin your 19J - they have a terrible reputation, but it's not entirely justified. They seem to be one extreme or the other: a bag of nails or very sweet. If you have a good one, as long as you continue to change the oil and filters regularly with good quality replacements, keep an eye on the water levels and generally look after it properly, it should give you plenty of good service. The oil cooler and cylinder bore oil jet conditions are very important to keeping the pistons from cracking, so fitting a new set of these jets and checking the cooler may be worthwhile.
 
MIKESLANDY said:
. How does the Disco have a couple of more horses, manifold layout less restrictive?
Click to expand...
Fuelling is a major factor.

We had 11.1 litre engines that were rated at under 150hp for Service Buses, through to 240hp for Coaches. Same block and pistons, different injectors and pump settings. The Injection timing was advanced and the injector nozzles had a narrower angle, so they still injected into the piston combustion chamber.

The basic engines were rebuilt at our Central Works and stored, then when one was needed, they fitted the Pump, Injectors and type of flywheel ( for a Manual box or a semi automatic) to suit the type of Bus.

As Nick says, the V8s were 92 hp in the first 90s and Stage Ones (someone could correct me If I'm wrong) to over 190hp on the SD1 Vitesse. A large capacity with little output doesn't strain the engine. You will probably have heard of the "Lazy 8s" big American flathead engines, with very little power.

Chris
 
Luckily enough I seem to have a good un. Do change oil and diesel filters every 4000 miles, where are these oil jets and is it a visual check on the oil cooler?
Thanks
Mike
 
The jets are inside the bottom of the block, just at the bottom of each bore. They look like 3/4" steel cubes with a bent piece of coat hangar coming out and up into the bottom of each bore, secured by one banjo bolt. It's a sump-off job, but it's a quick, simple job at that, and given these jets' notoriety for breaking from long term vibration fatigue and the consequential loss of piston cooling, it's worth doing.
 
Nick, Chris thanks for that, its a new one on me, assumed the oil was delivered via the con rod to the oil ring on the piston. Better have a serious rethink, do I want to keep my old 19j or not. The power is what Im misssing really, could live with the old dear otherwise.
Mike
 
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