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I've had my Peugeot 306 GTI's head gasflowed and the new valves seem wrong. Are they?

I have just had my Peugeot 306 GTI's head gasflowed with better cams. When I got it back I realised that on top of the valves there is a little dome recess. On one set of valves they are small and the other set have bigger recesses. Obviously one set are inlet and the other exhaust, but on one cylinder there are four valves all with bigger recesses. The company that did all the head work say it doesn't matter.

Asked on 26 August 2010 by Gti6carlo

Answered by Alan Ross
You should contact the company that did the work (by email if possible) and send them a photo of the modified head. Ask them to reply quoting that the work they have done is of an acceptable standard, and also that they can guarantee the work they have done, and that it will not affect performance.
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