RATTLE WHEN WARM HELP

[drivs]

my mate has a 172 and when its cold its fine but when warm the engine has a rattle,goes away when the revs are above a 1000,been told its the variable timing sproket,could this be the problem any help please guys.thanks ste

 

[Bluebeard]

Probably a camshaft dephaser.

Do a search on here, theres loads of info on them.

 

[drivs]

can it be fixed and is it dear.thanks ste

 

[Bluebeard]

It can be fixed, but its new cambelt time if you wantit done properly iirc.