Dats Right Posted March 23, 2014 Report Share Posted March 23, 2014 Does this distributer look bad, the shaft below the rotor( not sure what it is called) looks pretty chewed up in sections, iit is a 69' 521 with j15 engine, im having some rough running backfire issues, and was going to install new points and condenser but wondering if the condition of that shaft means i should replace the whole thing, Have been able to find dizz for the j13 and j16, are either of these the same as this one on j15? Quote Link to comment
datzenmike Posted March 23, 2014 Report Share Posted March 23, 2014 Look ok. The shiny areas are lobes like on a camshaft. The points wear block is pushed up to go over these and the points open. The dark areas are just grease where it doesn't rub. Gap new (or old) points 0.018" to 0.022" Timing is 8 degrees BTDC Back fire?? Out the exhaust??? Quote Link to comment
Dats Right Posted March 23, 2014 Author Report Share Posted March 23, 2014 Thanks, im trying to make an intermittent backfire go away, think it might be related to my carb issues but trying to rule out the distributor. Quote Link to comment
Dats Right Posted March 23, 2014 Author Report Share Posted March 23, 2014 Backfire out the exhaust along with sometimes out the carb when i press on the gas quickly or turn off, ti thought the timing was 6btdc from motorsports inc website, but 8 would change things Quote Link to comment
ggzilla Posted March 23, 2014 Report Share Posted March 23, 2014 Hard to say from that photo. If you wipe the cam down we could maybe tell. If that is rust it may wear the points rubbing block quickly. In any case if the dwell meter is at 49-52 degrees it is good Wiggle the shaft side to side. Any play in it will wreak havoc with the spark. Quote Link to comment
Dats Right Posted March 23, 2014 Author Report Share Posted March 23, 2014 just checked that is just grease, fairly clean when removed no wiggle side to side little up down, truck had been sitting long time when i found it, ive done a bunch of work but have not yet addressed the distributor, i will check gap and am wondering if there is any general maintenance even if it is not the cause of my rough running issues Quote Link to comment
ggzilla Posted March 23, 2014 Report Share Posted March 23, 2014 Checking the gap is only accurate with new points, because as they run a crater and peak naturally occur with the contact points. For this reason use a dwell meter. Maintenance calls for new points & condenser every 12 months/20k kilometers. Some old timers file the points, then re-check them with a matchbook cover (which are about .020 inch thick). Quote Link to comment
Dats Right Posted March 23, 2014 Author Report Share Posted March 23, 2014 thanks, i think shes a couple decades over due., does anyone know if the j13 or j16 points and condenser will work on this j15, they seem to be easy to find Quote Link to comment
ggzilla Posted March 23, 2014 Report Share Posted March 23, 2014 Or 1600/1200. Points are the same for all Hitachi D410 distributors Quote Link to comment
MikeRL411 Posted March 24, 2014 Report Share Posted March 24, 2014 Japanese made Buick "Opel" also use the same Hitachi point assembly. Work great on my RL411. Quote Link to comment
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