by gary d » Sun Dec 27, 2009 5:09 pm
Got an incredibly loud tapping sound coming from the top end of my GPX mivec one morning so brought her to my mechanic who diagnosed a problem with the tappets but said there was also a secondary knocking which sounded a little heavier than the tappets. Upon further investigation he found one of the hardened tips on the tappets to have fallen off. said hardened tips are held in place by a little plastic clip some of which were found to be perished. All suspect clips have been replaced and the missing tip was retreived as it had not fallen in to the cylinder, a new timing belt has been fitted and tappets all set accordingly with feeler gauge. Top end now sounds as smooth as a mivec can ( very mechanical sounding engine at their best IMO) On to the secondary knock, Can be heard at it's loudest on the rear bank of the engine, There are three core plugs on the rear bank of the engine and when the stethiscope is placed on the centre core plug this is where the knock sounds loudest. Has anyone else experienced a similar scenario? Can anyone suggest a possible cause.
Prior to this my engine was showing no tell tale signs that anything was amis, in fact she ran 177bhp on Ai Autosports dyno a couple of months prior which for a fiteen year old car aint too shabby IMO
Any assistance will be much appreciated as I cant wait to get her back on the road.
Last edited by
gary d on Tue Jan 05, 2010 5:09 pm, edited 1 time in total.
99 Subaru Impreza Turbo, 95 Mitsubishi FTO gpx, 2000 Nissan Micra.