can anyone help on technical question re tappets-
Discussion
I suppose it depends what you want to do. To look at them there is not much difference and you can put the cover back on OK afterwards - with care. If you want to remove and replace them then there are differences both to the valve length, tappet shape and timing tools, as well as the fact that there is no small inter cam chain only the large one coming from the intermediate shaft that does both jobs.
The difference is mainly because the inlet cam has dual lobes for high and low lift and the inlet camshaft has a hydraulic timing adjustment device on the end.
The exhaust camshaft is practically the same.
Although the timing is different - it actually uses a straight line between the cut out sections of the end of the camshafts - so it could be re-timed with quite a basic tool - made at home - with some care.
Baz Hartech
The difference is mainly because the inlet cam has dual lobes for high and low lift and the inlet camshaft has a hydraulic timing adjustment device on the end.
The exhaust camshaft is practically the same.
Although the timing is different - it actually uses a straight line between the cut out sections of the end of the camshafts - so it could be re-timed with quite a basic tool - made at home - with some care.
Baz Hartech
Gassing Station | Porsche General | Top of Page | What's New | My Stuff