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Since changing the oil and filter 05/30 fully synthetic and an oil flush I’ve noticed a puff of blue smoke ONLY when the engine (1.6 VTI) is warm and has been at idle for a few minutes (at lights etc) There is NO smoke on start up or when driving along. No codes come up in Diagbox and the exhaust solenoid appears to be in a clean condition. I’ve added wynns super charge to thicken the oil but still the same. The engine runs perfectly with no misfire or performance issues. Could it be the PCV? Can the pcv valve be deleted the same as the THP engines? Thanks
 

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we have the daughters with a tad of oil additive for 5 years now with no bad effect other than keeping the engine clean, even though peugeot say no additive oil or fuel.

have seen the same on other cars, but in that case oil separator gets blocked with gunk and blocks the pcv, then oil pressure gets high and forces oil past the oil/piston rings, but you would think you would get the oil pressure warning in a 207 as they are quite sensative.
could take the cam cover off and give it a parrafin bath, oil is getting in from there or rings or valves (but valves give a puff of blue smoke at startup mostly)
 

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Discussion Starter #3
we have the daughters with a tad of oil additive for 5 years now with no bad effect other than keeping the engine clean, even though peugeot say no additive oil or fuel.

have seen the same on other cars, but in that case oil separator gets blocked with gunk and blocks the pcv, then oil pressure gets high and forces oil past the oil/piston rings, but you would think you would get the oil pressure warning in a 207 as they are quite sensative.
could take the cam cover off and give it a parrafin bath, oil is getting in from there or rings or valves (but valves give a puff of blue smoke at startup mostly)



Thanks Stripe88, will give that a try.
 
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