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Mojoe
hi everybody i have got a 1.6 2002 focus ghia, i get a tapping noise from the engine on start up once warm it disappears, is this the tappets as i have cleaned out the engine with an oil change and flushing additive, it still rattled so i brought an oil additive as i was told i had a hydraulic valve model so unclear i bought a haynes manual and it said i had shims and that is as far as i have got can anyone help.
artscot79
[quote name='Mojoe' date='21 June 2010 - 08:28 PM' timestamp='1277147928' post='85780']
hi everybody i have got a 1.6 2002 focus ghia, i get a tapping noise from the engine on start up once warm it disappears, is this the tappets as i have cleaned out the engine with an oil change and flushing additive, it still rattled so i brought an oil additive as i was told i had a hydraulic valve model so unclear i bought a haynes manual and it said i had shims and that is as far as i have got can anyone help.
[/quote]

shims i think hydraulic are the old ones thats on the zetec engine not zetec e or se a small tapp is fine remember the oil doesnt flow straight away so once the oils got round the system and lubricated everything up on most cars a slight tap will go away and is normal dont use oil additives the original 5w oil is all you need

hydraulics are post 2000 models the revised zetec-e engine has shims you have the e or se
starfield
[quote name='artscot79' date='21 June 2010 - 07:49 PM' timestamp='1277149192' post='85781']
shims i think hydraulic are the old ones thats on the zetec engine not zetec e or se a small tapp is fine remember the oil doesnt flow straight away so once the oils got round the system and lubricated everything up on most cars a slight tap will go away and is normal dont use oil additives the original 5w oil is all you need

hydraulics are post 2000 models the revised zetec-e engine has shims you have the e or se
[/quote]


are shims newer !! is that the evolution from hydralic tappets??
artscot79
[quote name='starfield' date='22 June 2010 - 03:59 PM' timestamp='1277218167' post='85855']
are shims newer !! is that the evolution from hydralic tappets??
[/quote]

no the tappets stuck on the early models when they were hydraulic this meant special oil had top be used and it was a major issue so they revised the engine to conventional tappets with shims

Early versions of the engine had a problem with sticking valves - far more evident in the UK (and in cold climates), where a driving style with earlier gear changes is more common than on the Continent - unless a special Ford formulation of oil was used. After small changes in 1995 to fix this problem the engine was known as the Zetec-E. This engine received a plastic inlet manifold and EGR derived from the [url="http://en.wikipedia.org/wiki/Mondeo"]Mondeo[/url].

The Zetec had another redesign in 1998. This version, the Zetec-R, had a two-piece crankcase which helped damp out noise and vibration, conventional tappets with shims rather than hydraulic ones, and longer connecting rods with a lower piston compression height. This engine was used in turbocharged form in the [url="http://en.wikipedia.org/wiki/Ford_Focus_%28North_America%29"]Focus[/url] RS and had 212 bhp (dubbed [url="http://en.wikipedia.org/wiki/Duratec"]Duratec[/url] RS). It was also used in the [url="http://en.wikipedia.org/wiki/Ford_Focus_%28North_America%29"]Focus[/url] ST170 with a cylinder head modified by [url="http://en.wikipedia.org/wiki/Cosworth"]Cosworth[/url] with Variable Valve Timing on the inlet cam and had 170 bhp (127 kW; 172 PS).

The Zetec can be identified by having a silver cam cover with DOHC16v on the bottom left, the Zetec-E has ZETEC16v on the bottom left, and the Zetec-R has a black plastic cam cover.

as a result solid shims dont wear the tappets as m uch as hydraulics do if the tappets are making a niose ford have a special tool that allows the shims to be changed with everything still in place so no head stripping


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