IrishPatrol

[RiverPatrol]

You shouldn't need to disconnect the vacuum advance to set the timing. As I recall, the vacuum advance isn't doing any thing at an idle; it doesn't need to advance the timing until the engine is under load.

[Esteban]

You shouldn't need to disconnect the vacuum advance to set the timing. As I recall, the vacuum advance isn't doing any thing at an idle; it doesn't need to advance the timing until the engine is under load.

X2

Check to see where your vacuum line is connected at the carb. Might be at the wrong location.

I've always setup the timing on mine without disconnecting, and at 10° BTDC.

[mdawg4x4]

You shouldn't need to disconnect the vacuum advance to set the timing. As I recall, the vacuum advance isn't doing any thing at an idle; it doesn't need to advance the timing until the engine is under load.

X2

Check to see where your vacuum line is connected at the carb. Might be at the wrong location.

I've always setup the timing on mine without disconnecting, and at 10° BTDC.

It has been many many years since I took auto mechanics in school and set timing on a vehicle, but I remember always disconnecting the vacuum as well.

[Esteban]

It has been many many years since I took auto mechanics in school and set timing on a vehicle, but I remember always disconnecting the vacuum as well.

Yes. That's the way it's done normally. But what happens is that the vacuum is none at idle at the port that goes to the distributor. At least in the Patrol it should be that way.

This I found on a link regarding vacuum to the distributor:

When connecting the vacuum advance, most applications connect to a port above the throttle plates. This is called ported vacuum compared to manifold vacuum which comes straight from the intake manifold. The difference here is that manifold vacuum is there constantly while the ported source provides vacuum only when the throttle blades are open.

At idle, the throttle blade is closed, so the ported vacuum is almost zero.

[moore_rb]

Ok, good information-

Right, some older applications use full manifold vacuum on the distributor advance, and I coudn't remember if the Patrol did as well, or if it uses ported (or cruise) vacuum, and the P engine manual says nothing about it.

cool- I'll be setting mine tomorrow right before I do my hot lash settting on the rocker arms to try and quiet this valvetrain down a little bit.

[Esteban]

For the valve clearance and to speed up the process:

1. Bring Cyl #1 to TDC to adjust the following valves:
1 - 2 - 3 - 6 - 8 - 9

2. Rotate 1 full revolution to bring Cyl #6 to TDC and adjust the remaining valves:
4 - 5 - 7 - 10 - 11 - 12

Good luck.