Hi all,

I am about to buy a Defender 300tdi that had the original 300tdi swapped for a disco 300tdi due to high mileage on the original engine

Question is are the blocks / mounts the same, as far as I could gleen from searching they are, but I saw some posts with people having to mount the engines further back. Is it just the manifold that is different?

I have a discovery 300tdi engine that I was planning to rebuild from scratch and and drop in, and I wanted to return the Defender to Defender spec. If I can use the disco block and just get a Defender manifold to make it near enough standard again.

Thanks in advance.

The reason the 300Tdi would sit further back in the Land Rover/Defender would be if it was not originally a 300Tdi Defender and it was being mated to the earlier LT77 gearbox with the shorter flywheel housing.

We have a a 1988 110, with a 300Tdi mated to the LT77 with the shorther flywheel housing and we also have a 1991 Defender 110 that was originally a 200Tdi, but now has a 300Tdi and the R380 gearbox....the '88 engine sits much further back in the engine bay than the '91.

If yours was originally a 300Tdi and you are dropping in a replacement 300Tdi - I would think it would be an in and out job, as the later 300Tdi Defender was mated to the R380 gearbox in the first place - the same as the Disco.

The only difference as far as I know is the air filter.

Thanks, it has an R380 box, so i assume that all is OK, and its just had a drop in replacement. My old disco has sat on the drive for probably 4 years and its not going anywhere so i may as well rebuild the engine into the defender and scrap whats left.

JoelC said:

Thanks, it has an R380 box, so i assume that all is OK, and its just had a drop in replacement. My old disco has sat on the drive for probably 4 years and its not going anywhere so i may as well rebuild the engine into the defender and scrap whats left.

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the engines are identical apart from the temp sender in thermostat housing,given there are 3 choices non egr, egr, and edc