pushrod

Hi, would appreciate some help on the following: I have a late 1999 Mk4 LS400 that's approaching 100k & according to the service book some periodic jobs need doing, notably the Auto transmission fluid change and valve clearances. However , I can't seem to find any info on checking valve clearances for a MK4. Are they hydraulic on this model and non adjustable? Also, I've seen some posts on changing transmisison fluid & it looks a bit of a job. Could someone give me an idea of a reasonable quote for an independent specialist to do it? There seems to be conflicting advice about which fluid to use as well. Many thanks in advance.

Very much dependent on how you drive it, but on the motorway with air con off and cruising at about 80 mph I get 30-32 mpg regular as clockwork. I've seen 35mpg on a quiet A road journey going no faster than 60. If you use a lot of throttle then of course you're going to see far lower figures but with a sensitive right foot you can get surprisingly good results. I have a 1999 LS400, 99k with 5 speed gearbox (top gear might be a little higher than yours which would obviously help fuel economy...at 70 mph the engine's turning over at just over 2000 rpm). Really these cars are absolute bargains, I wouldn't be worried about the fuel consumption. Given a decent service record, the main thing I'd watch for is suspension work which can crop up at higher mileages.

No, it doesn't change irrespective of engine speed or higher/lower gears and the pitch of the noise stays the same.

This sound has been getting worse, and Lexus couldn't find anything wrong with the car. I took it to an independent specialist who said he was pretty much convinced it was the tyres (Michelin primacy HP). In his opinion they were not suited to the car and he suggested the Dunlops that the car came with originally would be a better bet. Other reports I've read of these tyres have been mostly favourable, has anyonoe else experienced similar issues?

My LS400 has a tingle through the accelerator pedal, you can feel it just when resting your foot on it. I can remember another car I looked at before buying mine had a similar characteristic. Engine seems fine in terms of performance. Any ideas? Many thanks.

Hi everyone, I have just bought a 1999 LS400 with 89k, full lexus history. Car goes great, but at 70 mph in top gear (around 2000 rpm) the car develops a lowish harmonic moaning sound (not as high pitched as typical transmission whine). It sounds a bit like tyre rumble over a poorly surfaced road, but it does not seem to change on different surfaces and is not present above or below that speed. Levels all seem OK. Has anyone else expereienced this problem or have any ideas as to what it might be? Could it be the exhaust? Thanks for any help.