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Old 05-28-2010, 08:45 PM
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Default Ignition Timing Adjustment

Hi all,
I'm in the middle of tuning the Disco and I'm having some trouble with the timing.
I've gone out and bought a timing light, hooked it up and straight away the marks show a fair way off, if the finger is at 2 o'clock the notch on the pulley was past 3 o'clock (20 degrees plus)
There is a slot in the fan belt pulley and a finger bolted onto the block - I'm guess this is TDC (Top Dead Centre).
How do I work out 6 degrees BTDC (Before Top Dead Centre)? there are no increment marks on the finger.

The other issue is that I rotated the distributor to line up the two marks and the vacuum advance is almost hard up against the power stearing pump! doesn't seem right.

Any help appreciated!
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Last edited by cranky; 09-11-2011 at 01:10 AM.
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  #2  
Old 05-28-2010, 09:03 PM
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per rave -- electrical, adjustment, timing -- engine warmed, idle no more than 800, vacuum disconnected, line up marks.

reconnect vacuum.

The rave cd is below in my sig.

luck,greg
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Rave cd 590mb link - (it's zipped)
http://www.landroverresource.com/
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  #3  
Old 05-28-2010, 09:13 PM
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Thanks Greg,
I got the RAVE but it is for later models. I downloaded an earlier version PDF. Maybe not quite as elementary as the RAVE.

Does the position of the Vacuum Advance sound right to you. Right now it is at about 4 o'clock. In my PDF of the '94 model there is a diagram showing the plug numbers on the distributor. In that diagram it shows the Vacuum Advance at around 10 o'clock.
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Last edited by cranky; 09-11-2011 at 01:10 AM.
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Old 05-29-2010, 08:45 AM
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The degree marks are on the crank pulley. You may have to get down there and clean them really well. Then I smear some white-out or white paint in the grooves so I can see them better.
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Old 05-29-2010, 07:58 PM
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Quote:
Originally Posted by cranky View Post
Thanks Greg,
I got the RAVE but it is for later models. I downloaded an earlier version PDF. Maybe not quite as elementary as the RAVE.

Does the position of the Vacuum Advance sound right to you. Right now it is at about 4 o'clock. In my PDF of the '94 model there is a diagram showing the plug numbers on the distributor. In that diagram it shows the Vacuum Advance at around 10 o'clock.

I would have no idea about proper initial clocking of the vacuum advance. (I've got a '97) and it states to have it disconnected while timing.

In the old days, we would set the timing mark to zero on the crank, drop the dist in with the rotor pointing at #1 in the cap. (make sure your oil pump shaft is engaged)

Confirm the rotation, set the wires in the cap in correct order, should start well enough to be timed.

Antichrist, the rave mentions "mark" as tho' there's only one.

luck,greg
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"Don't give up, it's only a machine"


'96 RR 4.0se 170K nice (but now gone)
"97 D1 Se7 130K - nicer -- ford injectors,airtex fuel pump,electric fans,gauges,no front sway,shocks,some bushings,side exh,alt,starter,CKPS,o2's,timing chain,waterpump,many flushes,crankcase cleaning,modified window tracks,cleaned MAF,repacked hubs,freed xfer linkage,rod bearings, cleaned rocker ***'ys, U-joints, Sony sound, etc.

Rave cd 590mb link - (it's zipped)
http://www.landroverresource.com/
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  #6  
Old 05-30-2010, 01:31 AM
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What I thought was the mark was a square notch - don't think it is used for timing.
After sanding the surface of the pulley with 800 grit I found the said notches with "after 12||6|||||6||12 before" scribed into the pulley.
It was really hard to see so I put a strip of electrical tape on the 6 (before side) and timed against that.

seems to be running okay - fuel consumption will tell I guess!
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Last edited by cranky; 09-11-2011 at 01:11 AM.
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Old 05-30-2010, 09:24 AM
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So I take that gauge to mean 12 degrees after and 6 degrees after TDC

And the second set to be 6 degrees before and 12 degrees before TDC

And the the marks in the middle as the acceptable range.
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Old 05-30-2010, 09:51 AM
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Quote:
Originally Posted by cranky View Post
After sanding the surface of the pulley with 800 grit I found the said notches with "after 12||6|||||6||12 before" scribed into the pulley.
Bingo!
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Four wheel drive allows you to get stuck
in places even more inaccessible.

62 88 reg
67 NADA x2
74 Air Portable - The Antichrist (tag 6A666)
95 D1 - R380
95 D90 - R380
97 D1 - ZF
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  #9  
Old 05-30-2010, 02:08 PM
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Antichrist, my apologies - but the rave did say "mark"

I'd do the same with the mark(S), clean 'em, paint 'em, wipe b/4 it dries.

luck,greg
__________________
"Don't give up, it's only a machine"


'96 RR 4.0se 170K nice (but now gone)
"97 D1 Se7 130K - nicer -- ford injectors,airtex fuel pump,electric fans,gauges,no front sway,shocks,some bushings,side exh,alt,starter,CKPS,o2's,timing chain,waterpump,many flushes,crankcase cleaning,modified window tracks,cleaned MAF,repacked hubs,freed xfer linkage,rod bearings, cleaned rocker ***'ys, U-joints, Sony sound, etc.

Rave cd 590mb link - (it's zipped)
http://www.landroverresource.com/
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  #10  
Old 05-30-2010, 06:23 PM
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Quote:
Originally Posted by Spike555 View Post
So I take that gauge to mean 12 degrees after and 6 degrees after TDC

And the second set to be 6 degrees before and 12 degrees before TDC

And the the marks in the middle as the acceptable range.
No, I think it is all 2 degree increments. So the centre | should be zero.

then again I could be wrong.

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Last edited by cranky; 09-11-2011 at 01:11 AM.
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Old 05-30-2010, 06:23 PM
 
 
 
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31, 39, 555, adjustment, advance, change, chip, discovery, distributor, engine, ignition, land, landrover, rover, timing


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