12k Service - Tappet adjustment
Discussion
Morning Olly,
Just had mine done, they needed kit as some gaps had close quite a bit, 12,000 miles since the last time so the answer is yes and may be better to do them more often that every 12,000 as well if mine was any thing to go by, a couple had almost no gap at all and that could have caused a burnt valve which you don't want.
Just had mine done, they needed kit as some gaps had close quite a bit, 12,000 miles since the last time so the answer is yes and may be better to do them more often that every 12,000 as well if mine was any thing to go by, a couple had almost no gap at all and that could have caused a burnt valve which you don't want.
Just had mine done.
Seriously thought about doing it myself, but in the end I let Paul at PPC do it.
Most of the inlets had closed up (4 thou ish) and some exhausts quite loose
Sounds so loooovely now when warm and the improvement in driveability around the dreaded 1800-2200 mark is so much better.
Top job
Seriously thought about doing it myself, but in the end I let Paul at PPC do it.
Most of the inlets had closed up (4 thou ish) and some exhausts quite loose
Sounds so loooovely now when warm and the improvement in driveability around the dreaded 1800-2200 mark is so much better.
Top job
gruffalo said:
Morning Olly,
Just had mine done, they needed kit as some gaps had close quite a bit, 12,000 miles since the last time so the answer is yes and may be better to do them more often that every 12,000 as well if mine was any thing to go by, a couple had almost no gap at all and that could have caused a burnt valve which you don't want.
Fortunately it's the inlets that close up rather than exhaust, so much less chance of burning a valve. However I completely agree that a 12k interval seems wildly optimistic, I remember adjusting valves on my 2.8 Cologne every 6k and even then they were badly out, however it was trivial job in comparison with the AJP8.Just had mine done, they needed kit as some gaps had close quite a bit, 12,000 miles since the last time so the answer is yes and may be better to do them more often that every 12,000 as well if mine was any thing to go by, a couple had almost no gap at all and that could have caused a burnt valve which you don't want.
Although it may be possible to do with the heads off (is that what you mean by 'engine in bits'?) most people say that the clearances can only be checked with the heads on, because torquing the heads down changes their alignment.
It is however much much easier to adjust clearances before the cam chain is fitted, because the cam can be fitted, checked, and removed again in less than an hour.
It is however much much easier to adjust clearances before the cam chain is fitted, because the cam can be fitted, checked, and removed again in less than an hour.
Then all you need to do is carefully follow the instructions in the workshop manual. http://www.tvr-cerbera.co.uk/files/WorkshopManual/...
gruffalo said:
How would having the heads torqued down on an over head cam engine alter the tappet gaps?
Unless you distorted the heads of course.
I think we're comparing the ideal world with reality, and in the real world the gaps are likely to change (or so I'm told by those that have tried both).Unless you distorted the heads of course.
gruffalo said:
How would having the heads torqued down on an over head cam engine alter the tappet gaps?
Unless you distorted the heads of course.
i was thinking exactly the same as you lol.Unless you distorted the heads of course.
if the heads are on or off it should not make a scrap of difference to shim clearance unless either your head or block are warped in which case you have far bigger issues than adjusting clearances.
on another note i need to do mine after xmas.....can someone tell me where i can get the shims from please and also direct me to any relevant threads thanks
pulsarboby said:
i was thinking exactly the same as you lol.
if the heads are on or off it should not make a scrap of difference to shim clearance unless either your head or block are warped in which case you have far bigger issues than adjusting clearances.
on another note i need to do mine after xmas.....can someone tell me where i can get the shims from please and also direct me to any relevant threads thanks
some here bottom of the page. And TVR power will do them to i guess.if the heads are on or off it should not make a scrap of difference to shim clearance unless either your head or block are warped in which case you have far bigger issues than adjusting clearances.
on another note i need to do mine after xmas.....can someone tell me where i can get the shims from please and also direct me to any relevant threads thanks
http://www.thetvrshop.com/TVR/Parts/Cerbera%20V8/c...
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