The advance mechanisms are covered on other pages on this site.rubber auto oil seals
Kia.Sloppiness in the distributor or its drive causes the timing to
flutter around, or “scatter”. This effect will be readily seen if you
uses a strobe light to look at the timing marks on the crank pulley. The
mark should, ideally, be very steady rather than be jumping about.
In reality, with mechanical distributors some movement usually occurs other than if everything is freshly renewed. A couple of degrees is not unusual and while not ideal is still acceptable. Any timing scatter of more than 5 degrees should be followed up. I have seen up to 20 deg in bad cases!rubber auto oil seals Kia.
Unfortunately, remedies for timing scatter are not cheap or simple, and come down to either a full distributor overhaul (or new distributor) and/or a new camshaft & distributor drive spindle. However, if scatter is bad you will be well rewarded with both power and economy if it is fixed.rubber auto oil seals Kia.
The most common cause of timing scatter in B series engines is wear in the gears which drive the distributor, especially the one on the camshaft since the oil pump is also driven by this.rubber auto oil seals Kia. (A series suffer from this too, but not anywhere near as frequently as the oil pump drive is elsewhere.) For this reason, always check this potential source of scatter before assuming it is the distributor bearings etc worn. To check without removing the camshaft, remove the distributor and see if there is significant backlash in the drive spindle. (Note: backlash can also be caused by the use of a gasket between the distributor mounting fitting and the block, as it allows the spindle to float axially.)rubber auto oil seals Kia.
In reality, with mechanical distributors some movement usually occurs other than if everything is freshly renewed. A couple of degrees is not unusual and while not ideal is still acceptable. Any timing scatter of more than 5 degrees should be followed up. I have seen up to 20 deg in bad cases!rubber auto oil seals Kia.
Unfortunately, remedies for timing scatter are not cheap or simple, and come down to either a full distributor overhaul (or new distributor) and/or a new camshaft & distributor drive spindle. However, if scatter is bad you will be well rewarded with both power and economy if it is fixed.rubber auto oil seals Kia.
The most common cause of timing scatter in B series engines is wear in the gears which drive the distributor, especially the one on the camshaft since the oil pump is also driven by this.rubber auto oil seals Kia. (A series suffer from this too, but not anywhere near as frequently as the oil pump drive is elsewhere.) For this reason, always check this potential source of scatter before assuming it is the distributor bearings etc worn. To check without removing the camshaft, remove the distributor and see if there is significant backlash in the drive spindle. (Note: backlash can also be caused by the use of a gasket between the distributor mounting fitting and the block, as it allows the spindle to float axially.)rubber auto oil seals Kia.
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