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Timing belt change

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Kickstart
The Oracle



Joined: 04 Feb 2002
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PostPosted: 11:20 - 24 May 2017    Post subject: Reply with quote

stevo as b4 wrote:
Also how much more of a pain in the arse is it to do a belt swap on an engine where the cam pulleys are not keyed to the cams? I have only seen one engine where this was adopted and it was a quad cam V6 with 3belts to drive the cams, as there were link belts on the inlet/exhaust cams.


The old Alfa 16v TS engines are like this. And a large part of what makes it a pain.

Not 100% sure why. Yes it has VVT on the inlet cam (but then they did one some chain driven cams since the early 1980s, and the chains occasionally needed changing and were easy). My assumption was that it was at least partly to get the timing right when manufacturing tolerances of replaced pulley wheels, etc, were taken into account.

Be far easier if they would just stick VVT on both cams and then let the engine use the VVT setup to get the cam timing perfect.

All the best

Katy
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