Sammyt80 Posted January 11, 2012 Posted January 11, 2012 My t80 has got a ratterly cam chain I adjusted and then 2 days later it's slack again the engines only 12,400 miles and don't think it needs changing. Some body told the adjuster screw could need replacing and then give the adjuster spring a slight stretch to sort, does this sound right
Moderator DirtyDT Posted January 11, 2012 Moderator Posted January 11, 2012 It sounds like it is backing itself off. Many cam chain adjusters tend to do this, especially if they are automatic (rely on a spring). I don't know what type yours is and a good clean and new spring may cure it. You don't want to chain jumping the sprocket as that will make a mess. LINKY to parts
Sammyt80 Posted January 11, 2012 Author Posted January 11, 2012 Got a new adjuster screw and going to stretch the spring abit and see if that helps tomorrow, It's semi auto adjusting meaning I have remove part number 13 and turn the engine over twice then replace the screw and the spring takes the slack up.
Moderator DirtyDT Posted January 11, 2012 Moderator Posted January 11, 2012 I would check 8, 9 and 10. The drawing isn't clear but it looks like 10 is the main spring and 8 needs to slide, sometimes with a slight screw. It also looks like 13 just tensions no 8. It could be a combo. I might be talking rubbish here by the way.
Sammyt80 Posted January 11, 2012 Author Posted January 11, 2012 I will have a look tomorrow, just going to change the screw it could of worn down and not hold the adjuster in place and stretch the spring and also valve clearance, just got the proper tool kit through with every thing needed to do that including feeler gauge and rocker adjuster holder, really hand little tool kit. I could be talking rubbish as well but see what happens tomorrow
Moderator DirtyDT Posted January 11, 2012 Moderator Posted January 11, 2012 Good luck. It is just that 13 looks at right angles to the guide (7) so I can't see how it can tension it against the chain.
Sammyt80 Posted January 11, 2012 Author Posted January 11, 2012 13 presses against 8 there a notch in 8 which acts as an a locking type thingy, I will stretch the spring to give more adjustment.
YPVS TONE Posted January 12, 2012 Posted January 12, 2012 From memory I don't think you have to remove number 13 totally to adjust. Seem to remember to adjust cam chain you remove LH engine cover, turn engine over to set piston to TDC on the compresson stroke (with both valves closed). Undo and remove domed nut #16, just loosen nut #15 and loosen screw #13.This lets the spring #10 take up any slack in the camchain. Retighten screw #13 to lock it against #8 to maintain tension in camchain, retighten locknut #15 and replace domed nut #16. Tony
Moderator Airhead Posted January 12, 2012 Moderator Posted January 12, 2012 +1 sounds good to me tony
Sammyt80 Posted January 12, 2012 Author Posted January 12, 2012 Sorted just the inlet valve Tappat cover has rounded and can't access the inlet rocker and valves any suggestions.
Recommended Posts