L20b timing issue

[Datsun/Nissan finatic]

coming from scott with the 78' 620. need to no why my distributor is so far advanced to reach the 12 BTDC. My vacaum diaphram is almost hitting the motor pull bracket. Any ideas please.

[datsunaholic]

Common reason- the oil pump drive spindle is a tooth off.

 

2nd common reason: Wrong pedestal for the dist (like using a points pedestal on a EI dist... they fit, but with the wrong clocking)

 

 

 

Wait... almost hitting the WHAT? The lift eyes aren't anywhere near the dist on an L-series... front one is behind the fuel pump, rear one is next to the firewall.

[jefe de jefes]

Wrong pedestal?

[Datsun/Nissan finatic]

when i took the dist, out i noticed threr is only one way it goes in like an offset reg, screwdriver. and the loop is rite along side

[racerx]

There are 2 bolts that can adjust the distributor on my 510, I know you have a truck but most distributore are interchangeable in L series engines. When I say most are interchangeable is because of single point will only work with pertronix system.

 

 

back to the distributor. One bolt adjust your timing and the other one which is underneath the distributor can adjust your play..have you tried this one yet. Is this a new distributor? Did you install a new oil pump? if so maybe you are off a tooth or so. Let us know what happened.

[Datsun/Nissan finatic]

no its not new and i did not know there was an adjustment thank u . its just not sitting rite to seeing the vacaum diphram seems turned to far advanced.

[banzai510(hainz)]

the is a 8mm bolt under the dist u can loosen this to get more or less adv out of it beside the normal bolt holding it down.

 

 

olddatsuns.com ck it out the tech section.

[Datsun/Nissan finatic]

thank you so dist. has to come out. i thought it was a streached belt. so id much rather an 8mm great

[banzai510(hainz)]

YOu can go by feel and get a 8mm box or end end and loosen it.

loosen the 10mm hold down one also and you should be able to move the dist a great amount. and hopefully have enought movement.

 

One thing if the vacuum canister is going to hit anything is you can take the pedastal that mounts on the timming cover and move it 180deg so that tang is pointing in the oppisite side. But you have to move your spark plg wires as your cap will be moved 180deg.