306 2.0 hdi 16v

[Ruan]

camshaft numbers are diferent, but maybe because RHR is a cam driven high pressure pump

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RHR intake cam is 801AC and exaust is 801AE

RHM/RHW/4hx intake is 801V9 and exaust 801W0

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Is that 0.53mm gap between valve and piston at tdc? If so you need to get the cutouts enlarged. You ideally want to leave 1mm to take into account rod stretch etc.

JP

the 0.53 mm is the depth of the valve cut on rhr pistons that i have

Yeah, just the cutout depth.



That's a RHW engine - so yes they definitely have the cut outs. The cam lift MAY be different due to the RHW/RHT having swirl flaps, the later RHR doesn't.The RHR engine may use smaller valve lift to induce higher gas velocity to generate greater swirl.

I really don't know any way of truly finding out if they're different - other than building and measuring the gap with plasticine. However I'd be fairly confident it'll be fine, but apart from measuring it - I don't know.