"Teflon" <
[email protected]> wrote in message
news:
[email protected]...
>
> First of all, if you have 'killed" two 2.5Td's, how dead are they?
> I've been looking for a cheap 2.5Td to recon and put in my 109 for
> AGES, if you have one that I could salvage..........
Hmmm, first one was definately DOA - conrod through block
/ The
current one I'm not sure of - it refused to start, thenwhen it did went
'bang' (I said I wasn't a mechanic!) It was still running after the
bang, but not very well. I turned it off and haven't tried again.
> Other wise, where to begin?
>
> Right, well the 2.5 was based on the 2.25, and in fact the last of the
> line five main bearing 2.25's share the same block and head castings.
>
> Effectively they should be bolt for bolt interchangeable. I think you
> may need to check the position of the location dowels on the
> bellhousing to engine mating faces, I think that there's an extra one
> on the 2.5 block, so basically you may have one empty hole.
>
> Other wise it should all be pretty straight forward.
I like the sound of this! My main concern was mountings and gearbox
fitting stuff, but it sounds like there should be no major problems.
> Only things that might catch you out are things like the fact that the
> 2.5Td has a servo shut off that works electrically from the ignition
> switch, where the old S3's had a choke cable 'pull to stop' - that
> means you may have to put a cable stop in.
>
> You'll probably also need to get an early 90 NAD down pipe for the
> exhaust to replace the turbo and waste gate, and really that should be
> about it.
>
> Performance wise, well it is going to be a LOT less 'eager'.
The latest TD managed a top speed of 70mph, so I don't think the loss in
speed will be too severe, and I tend to stick to 60 most of the time
anyway; keeps my license clean!
> 2.5Td makes about 90bhp.
> 2.5NAD makes about 70bhp
> 2.25d makes about 60bhp.
>
> But, early 90's has the 2.25 motor, so it is not a hugely retrograde
> step.
>
> Expect top speed to be down to about 70mph though, and it to not be
> so keen on hills, other wise it should work OK.
>
> Last thing though, why are you killing the 2.5Td's?
>
> I know that they had some weaknesses, but biggest reason for self
> destruction is user abuse or neglect.
The original motor had done almost 130k, and I hear that's about it fot
TDs. I got it with 127k on the clock, so no idea of care or otherwise.
The latest was very tired, and I got it for £100 and had it fitted
almost as it was, so I think it was on it's last legs. If you're nearby
feel free to come see it - I don't have any plans for it!
> If you dont find out what the cause is, in all probability you could
> end up killing whatever replacement you put in there.
I hope not! I do check water/oil regularly, I just think I've been
unlucky. That's why I want a bombproof engine in there. A Tdi would be
fantastic, but waaay to expensive, and I think a V8 would take too much
bother to fit (unless someone has one they don't need, and the time to
put it in for me?? ;o)
Thanks for the answers.
Andy
