

| Subject: | Re: Tuning/Timing |
| From: | John Rodgers |
| Date: | Sat, 12 Nov 2005 05:54:41 -0600 |
John, those engine timing instructions were precisely what I needed .......clear, precise, and to the point. I'll get on it this morning. Thanks, John Rodgers 88 GL Driver John Bange wrote: >>Just changed plugs, rotor, distributor cap. Engine has moderate spark >>knock/detonation when under load like climbing a hill, accelerating >>hard (if there is such a thing in a Vanagon). Timing issues I'm sure, >>but if any one has any tips about how best to tackle this >>detonation-under-load issue, or tips and tricks on setting the timing, I >>would appreciate hearing from you. >> >> > > >If you have pre-detonation, yeah, first thing to do is make sure the timing >is set properly. Bentley is a little confusing on the issue, as it assumes >you have an electronic device (VW1367) telling you the RPM and timing >setting. Really, though, it's easier than it sounds >: >-FIRST!: Get a 10mm socket and loosen the collar on the distributor. >once the engine's running, you don't wanna be fiddling with a wrench >under the belt when it's running! > >-Then, turn the crank pulley till you find the V shaped notch on the >inner edge. I have a 30mm socket and crappy 1/2" ratchet that fits >the crank pulley bolt I keep just for that purpose, but an adjustable >wrench on the alternator pulley nut usually works. Steal some nail >polish from your wife or mother or sister or some liquid paper from >work and mark that V notch so you can see it under the timing light. > >-hook up your timing light > >-warm up engine to 80degC (temp needle about centered on LED. I >actually wait until the cooling fan kicks on and off once, as this >assures that the whole engine is up to temperature. > >-unplug the blue Temp II connector from the SIDE of the thermostat >housing. It's sometimes a pain to yank it loose and you can only >really reach it with one hand. > >-wedge a screwdriver blade in where the throttle stop screw is to >keep the RPMs up to 2000-2500. It may require some fiddling to >keep it in that range as you adjust the timing. > >-point the timing light at the crank pulley. nudge the distributor a >little at a time till the V notch (5 degrees BTDC) lines up with the >seam between the engine case halves. > >-shut off engine, tighten down distributor collar, reconnect Temp II >connector, and clean up. > >-- >John Bange >'90 Vanagon - "Geldsauger" > > > >
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