Need a feeler guage for tappet adjustment

longdrive (longdrive) 2011-09-30 13:29:37 +0500 #21

I am also working on a DIY tappet setting of cuore. I have one question- What is the best way to determine that rocker arm of a valve is at its topmost position for gap checking. I have seen many techs just rotate the main bolt to rotate timing belt pulley and estimate the top position of each rocker arm when it stops rising, but this still leads to inaccuracy because its only visual judgement and we never know if cam lobe is at its correct position.
Expert advice needed on this from member like @Xulfiqar

Xulfiqar (Xulfiqar) 2011-09-30 13:47:20 +0500 #22

The should be adjusted when the cam's base circle is facing the rocker arm face. That position allows some degree of error as the base circle has a large timing compared to the ramp.

The ideal way is to set the respective cylinders to TDC checking the cam pulley or the crank marking. Do not adjust the tappets by looking at the distributor arm, its not a good reference point.

sohna (sohna) 2011-09-30 13:55:22 +0500 #23

I can understand ur problem , actually u r in doubt about the exect position of TDC , the best way is check the mark on pullies and concern with ur engine manual.
Also on TDC both valves should be free.
If u doing the valve lash with feeler gauge then make sure that after adjustment gauge should not to tight or to lose.
By the way using feeler gauge is an old method , now u can find a valve lash tool with dial gauge that will give u exect 100 % reading.

longdrive (longdrive) 2011-10-03 15:34:23 +0500 #24

ok before doing anything I will check for TDC marks on the pulley if I get time over the weekend.the timing belt cover does have a small hole for this purpose...
Talking of dial guage, do any workshops in lahore carry such equipment?

Xulfiqar (Xulfiqar) 2011-10-03 15:48:14 +0500 #25

the dial gauge method is very good, mostly used in engines where the adjustment screw is deep buried or requires more trouble to adjust (old MB engines or even the F6A suzuki engine)

the feeler method is perfect in your given case. just be sure where the manual specifies the clearance to be measured. e.g. the CB23-37 daihatsu engines required the clearances to be checked between the camshaft profile and rocker face.

driver_guy (driver_guy) 2011-10-04 03:04:56 +0500 #26

coure in pak has Daihatsu ED-10 carby engine.

Here is a pic from factory manual showing valve clearance adjustment
..

Sharo53 (Sharo53) 2011-10-04 05:03:35 +0500 #27

"The ideal way is to set the respective cylinders to TDC checking the cam pulley or the crank marking"
need some details on it hoe o do it plz...