Is the problem that I'm not a believer?

I didn't mean to give the impression that I needed to find more power or that there had been a deterioration in performance.

If my test measures anything at all, then the performance has remained unchanged for about 100,00km.

There is no problem with the throttle cable. I had read that it can be a problem, but it is OK and as I said, I didn't believe I was down on power.

I guess that the suggestion that 10% improvement is the minimum to be noticeable means that there would be a different sensation. I was hoping that the way the speed held unchanged for several seconds near the top of the hill meant that there was exactly the right amount of power to hold that speed. I would have thought that a small change in power would be most noticeable in that situation.

I don't think there was anything wrong with the performance before the changes. It appeared unchanged for about 100,00km. I was happy with the way it performed all that time. It was just that given the rave reviews that other gave about some of those things I changed, I thought there might be a tiny change. It didn't show up in my test.

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Originally Posted by boofdtl

Have you done any exhaust work on it at all...

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No. I'm not looking for any more power. After 23 years of driving a Series III LWB, I am still adjusting to the exhilarating performance of the 300TDi. :D

what you have is an example of good maintenance and repair being conducted on a vehicle that is already in good condition.

IF your intercooler hoses aren't delaminating or sucking closed then changing them wont make any difference to the performance of the vehicle. Changing them does ward off their eventual failure for quite some time as well as allowing you to conduct other maintenance such as cleaning the pipes and intercooler.

IF your lash adjustment is correctly set then checking it and making a poompteenth adjustment on one or 2 is not going to make a difference but when you come to check them next time it provides you with a better reference for how things are wearing out and when you need to check the lash caps for replacement.

IF youve gone to the effort of inspecting and retensioning the timing belt cool, now you know its condition and know that the pump is playing correctly.

IF youve been doing all your own maintenance or have bought the vehicle from someone that claims they have done all their own work and maintained it well any maintenance adjustment that you check but dont have to adjust is merely an indication of a well looked after item that will continue to offer you good service.

When you make a check then need to do an adjustment and you get a gain as large as 10% in performance then that calls into doubt the quality of the work that was done prior, is a warning of an impeding component failure or is an indicator of a component failure that has been rectified by its replacement, servicing or adjustment.

Personally it makes me happy when I do a major service on a vehicle and the customer is unable to detect any change in performance.

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Originally Posted by Blknight.aus

IF youve gone to the effort of inspecting and retensioning the timing belt cool, now you know its condition and know that the pump is playing correctly.

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Just to clarify, we (Tank and I) replaced the belt, along with the pulley and the tensioner.

Before I bought the vehicle (from a Toyota dealer) at 111,000 km, it wasn't clear whether the belt had been replaced, in spite of the fact that there was documentary evidence of regular servicing and good maintenance. So I insisted on the belt being replaced as a condition of purchase. I asked that they give me the old belt in the hope that it would tell me if it had done 111,000km or 31,000km. Comparing it with the one I took out after another 80,000 km suggests that the original may have been replaced on schedule at 80,000km.

After some of the horror stories about belts, I had expected more signs of deterioration after 80.000 km. Perhaps the fact that the belt still looked in excellent condition means that my theory about the advantages of buying the last year of a model run rather than the first has some validity. By then I hoped LR had solved some of the problems of alignment and tension. It is probably another indication that the vehicle was maintained properly.

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Originally Posted by vnx205

Just to clarify, we (Tank and I) replaced the belt, along with the pulley and the tensioner.

Before I bought the vehicle (from a Toyota dealer) at 111,000 km, it wasn't clear whether the belt had been replaced, in spite of the fact that there was documentary evidence of regular servicing and good maintenance. So I insisted on the belt being replaced as a condition of purchase. I asked that they give me the old belt in the hope that it would tell me if it had done 111,000km or 31,000km. Comparing it with the one I took out after another 80,000 km suggests that the original may have been replaced on schedule at 80,000km.

After some of the horror stories about belts, I had expected more signs of deterioration after 80.000 km. Perhaps the fact that the belt still looked in excellent condition means that my theory about the advantages of buying the last year of a model run rather than the first has some validity. By then I hoped LR had solved some of the problems of alignment and tension. It is probably another indication that the vehicle was maintained properly.

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Allan, I know what you done wrong, you should have bought "Blue" silicon hoses, much faster, LOL. Anyway serious now. BTW I believe we both have the same test hill, the big bugger at the end of the Coila Lake straight (coming from your end).
When I purchased my 94 TDi 300 Disco it had 388,000klms up and it ran like a dog so I ran it up the test hill and noted the result, I knew it had problems, the rubber intercooler hoses would swell up like party balloons. Replaced with "Blue" silicon hoses and cleaned intercooler, speed over the top (held like yours) improved from 80klm/h to just under 90klm/h(110klm/h at the bottom of hill), all my speeds are from the gps.
Every time I made a change, I tested again, changing the air inlet from the Safari (snorkle) position on the side of the canister to the front got me another 5klm/h, removing the muffler and new air filter gets me over the top at 100klm/h. Not really noticable in normal driving, but noticable off the mark and pulls much better at low revs, so not a big HP increase but noticable Torque increase, Regards Frank.
P.S. have you heard from the kayaker, any trips planned?

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Originally Posted by Tank

Allan, I know what you done wrong, you should have bought "Blue" silicon hoses, much faster, LOL.I have heard good reports about the red ones. :) Anyway serious now. BTW I believe we both have the same test hill, the big bugger at the end of the Coila Lake straight (coming from your end).That is the one. I'm convinced that the way the speed stays constant near the top of the hill makes it a useful measure.
When I purchased my 94 TDi 300 Disco it had 388,000klms up and it ran like a dog so I ran it up the test hill and noted the result, I knew it had problems, the rubber intercooler hoses would swell up like party balloons. Replaced with "Blue" silicon hoses and cleaned intercooler, speed over the top (held like yours) improved from 80klm/h to just under 90klm/h(110klm/h at the bottom of hill), all my speeds are from the gps.I would expect your Disco to be slightly more aerodynamic (these things are all relative :D) than the Defender and so hold a slightly higher speed.
Every time I made a change, I tested again, changing the air inlet from the Safari (snorkle) position on the side of the canister to the front got me another 5klm/h, removing the muffler and new air filter gets me over the top at 100klm/h. Not really noticable in normal driving, but noticable off the mark and pulls much better at low revs, so not a big HP increase but noticable Torque increase, Regards Frank.
P.S. have you heard from the kayaker, any trips planned? Last report, he expected to be here around 20th, which is next Tuesday.

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http://www.aulro.com/afvb/trip-prepa...ml#post1792445

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Originally Posted by vnx205

Just to clarify, we (Tank and I) replaced the belt, along with the pulley and the tensioner.

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Just truncate your quote of my quote to read

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Originally Posted by Blknight.aus

cool, now you know its condition and know that the pump is playing correctly.

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still apples... :)

as a side thought...


did you inspect the lash caps?

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Originally Posted by vnx205

Maybe I just don't have enough faith. In which case, I have the feeling that if I fitted a hiclone, that wouldn't help either. :D

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Go on, you know you want one. :D HiCloneTestimonials

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Land-Rover Discovery 200TDI: When the second unit was fitted, the vehicle was transformed – it runs very well even uphill when cold.

Land-Rover Discovery 300TDI: After using the Hiclone for two weeks on the Discovery, I found it does reduce the turbo lag, enough to convince me to purchase another one.

Land-Rover Discovery 300TDI: I must say I had my doubts before but I actually got about 15% better fuel consumption on the freeway.

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Originally Posted by Blknight.aus

as a side thought...


did you inspect the lash caps?

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I had checked them about a month before I did the belt and they still looked almost brand new.

I was prompted to check them by the thread about someone's lash caps disintegrating with monotonous regularity and was pleasantly surprised to see how good mine looked.

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Originally Posted by vnx205

I keep reading about the performance increase that people are able to get with various additions, adjustments or maintenance.

I heard about the problem of turbo hoses delaminating and softening, so I replaced mine with silicone. There was no change whatsoever in the measure that I use to test performance. However, it has been suggested that my mistake was buying black hose. Apparently red is faster. :)

I heard that tappet adjustment is critical, so I checked the tappets. There was minimal adjustment required on one or two. Once again there was no change in the performance.

I have heard it suggested that normal wear on the timing belt might retard the injection timing by a miniscule amount, so I thought that when I did the timing belt that I might notice an improvement. To make it even more likely that there would be an improvement, I flushed out the intercooler. However, the performance remained unchanged.

My testing method is to approach a hill near home at 100kph indicated speed and press the accelerator to the floor. If there is no wind from any direction, the speed is 85kph indicated at the top and that 85 is held unchanged for some time as the hill flattens out slightly near the top. I would have expected that any change in the performance would show up in that section near the top where the power is just sufficient to maintain speed with no increase or decrease.

So, I wonder what the problem is.

Maybe my testing method is inadequate.

Maybe none of the changes were enough to have a noticeable effect. The turbo hose was just a bit soft, but not damaged. The tappets were very close to perfectly adjusted, the old timing belt showed no visible wear and there wasn't what I would have thought was a lot of oil in the intercooler.

Maybe I just don't have enough faith. In which case, I have the feeling that if I fitted a hiclone, that wouldn't help either. :D

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You is missin 1 cylinder man :p:p:p:p:p
Andrew