KV6 Cambelt snag - Help?

[TeeCee]

I'm at a bit of a loss here. I've got the whole thing in bits and have had for a week now. The first, cheap, tool set didn't fit at all (I had to butcher the brackets to get them to reach the socket on the exhaust cam), so I've just got another rather more pricey one.
So, here's the adaptor:

Here's the tool fitted to the inlet cam on the front bank:

...and here's the resulting alignment at the rear:

..which looks to be about a tooth out to me.

So what on earth, if anything, am I doing wrong? Two toolsets now, one of which had to be "fettled" to fit and the resulting alignment is identical. Needless to say it is, if anything, worse with the 2 litre adaptor fitted.

Any ideas?

[350zwelgje]

I do first the front belt.

When done undo the tools and do the back two and use the tool for that.

So not front and back at the same time.

Hope it helps.


Rob

[SD1too]

Originally Posted by TeeCee

Here's the tool fitted to the inlet cam on the front bank ...
...and here's the resulting alignment at the rear ...
So what on earth, if anything, am I doing wrong?

You're not doing anything wrong Tim. The rear notches don't quite line up. This has been documented many times and is best accepted as a quirk. Ignore it and proceed with fitting the front belt. When that's done, you will need to remove the flywheel/drive plate locking pin and rotate the engine very slightly so that the rear notches do line up and you can then fit the rear tool.

Simon

[dave lincs]

Is your car a 2.0 or a 2.5? As the timing tools are different I've done quite a few of these shall we say and that does not look right to me from the picture

[SD1too]

Tim's car is a 2.5 Dave so as you can see from the photograph, he's using the correct adaptor. The misalignment at the rear sprockets is common and not relevant when the front belt is being fitted using the tooling. Have you really never come across this on the KV6s you've done?

Simon

[dave lincs]

Originally Posted by SD1too

Tim's car is a 2.5 Dave so as you can see from the photograph, he's using the correct adaptor. The misalignment at the rear sprockets is common and not relevant when the front belt is being fitted using the tooling. Have you really never come across this on the KV6s you've done?

Simon

Hi Simon
I have the genuine tools and have not had this before but I always do the rear belts first

Dave

[T-Cut]

Originally Posted by TeeCee

- - - - -
...and here's the resulting alignment at the rear:

..which looks to be about a tooth out to me.

After watching the YouTube video (which is about all I know of this particular job), it's clear that your expectation, (that the peripheral notches on the gear wheels should align), is incorrect. The notches appear irrelevant to the job. If you watch the video, after the front belt is fitted, the rear gears are removed after fitting the tool 18G1747 which is used to maintain them in their current orientation. From here on, there's no mention of peripheral notch alignment, only that the central keyways must point towards each other before adding the belt. After spreading the gears to tighten the belt, tool 18G1747 is added and the assembly applied to the camshafts. If there's a mis-alignment here, the relevant camshaft is turned to fit the gear position. This step is the essential difference in it and seems counter-intuitive.


KV6 Belt Change: https://www.youtube.com/watch?v=2fFx8SPiTSc


TC

[SD1too]

Originally Posted by T-Cut

After watching the YouTube video (which is about all I know of this particular job), it's clear that your expectation, (that the peripheral notches on the gear wheels should align), is incorrect. The notches appear irrelevant to the job.

Hi T-Cut,

That video deals with the previous generation of KV6 engine fitted to the Rover 800 series which didn't have notches in the rear camshaft sprockets. On the 75/ZT it is not possible to fit the removal tool, which is 12-175 not 18G1747 (which is the part number for the front tools), unless the notches are aligned so they are very relevant to the job!

But as a 1.8T owner you wouldn't be expected to know that!

Originally Posted by dave lincs

Hi Simon
I have the genuine tools and have not had this before but I always do the rear belts first.

Ah. Without attempting to fit the flywheel/drive plate locking pin I would imagine.

Simon

[dave lincs]

Originally Posted by SD1too

Hi T-Cut,

That video deals with the previous generation of KV6 engine fitted to the Rover 800 series which didn't have notches in the rear camshaft sprockets. On the 75/ZT it is not possible to fit the removal tool, which is 12-175 not 18G1747 (which is the part number for the front tools), unless the notches are aligned so they are very relevant to the job!

But as a 1.8T owner you wouldn't be expected to know that!

Ah. Without attempting to fit the flywheel/drive plate locking pin I would imagine.

Simon

Simon

I do fit the flywheel locking tool why do you suggest I dont fit it??

Dave

[SD1too]

Because when it is fitted, on my car (same year as yours), on Tim's and on those of other DIY members, the rear notches don't quite line up.

Simon