Tappets Loose

[Mack_ke70]

I have recently blown and engine and i have to out another engine in it (4k) only problem is the new engine has loose tappets and it sounds pretty bad, is there anyway i can tighten them or replace them from the old motor as they were good, if there is a write up anywhere for this please link me :)

[GJM85]

It's not hard to remove the rocker cover and gaze upon the awesomeness of adjustable rocker gear.... Adjustment is easy if you have any form of mechanical knowledge. If not, just take it to a mechanic.

Edited July 23, 2013 by GJM85

[josh247]

http://www.rollaclub.com/wiki/index.php?title=Tech:Engine/K_Series/Valve_Clearances

[altezzaclub]

Two ways of doing it- Cylinders one and four move up and down together, and cyls two and three do also, but 180deg away from 1& 4. They fire in the order 1.3.4.2.

 

A)- Turn the motor over with a spanner on the crank pulley and watch the rockers on number four. As the inlet opens and the exhaust closes you can get the valves equally open, and you will see the timing mark come up to zero. Then number 4 is on exhaust stroke and number one is on compression. Set number one, 10thou inlet, 12thou exhaust cold. Next cylinder to fire is three, so watch cyl 2 rockers as you turn the crank and when they both are equally open, set number three. Then watch cyl one, you'll get the timing mark again, and set four, and finally watch cyl three and when they both are equal set cyl two.

 

Most people do it like that. The option is the 'Rule of Nine'...

 

B)- When one rocker is right down, the rocker that adds up to nine can be set, so you just number the rockers 1 to 8 as you see them on the motor. They pick 'right down' because the valve is only at max opening for a short time, so you can easily see that. So just turn the engine and watch a rocker, say number one, on cylinder one. When it is right down, set number 8, look for another , say number 3, and when it is at max open set number 6.. You just work your way around the engine until you have done them all.

 

Sadly, some never shut up! The valve wears a groove in the end of the rocker, and your feeler gauges bridge that groove, so the gap is a few thou larger than you measure. The follower can get a groove where it runs on the cam and that clicks every time too. With a race/rally motor we set the cam to the degree when it should open on a dial gauge and close the tappet up on that.

[Mack_ke70]

Thanks heaps got it sorted !