Ignition Timing Adjustment - Land Rover Forums - Land Rover Enthusiast Forum
 

Go Back   > >

Reply
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 05-28-2010, 08:45 PM
cranky's Avatar
Senior Member
Thread Starter
 
Join Date: Sep 2009
Location: Brisbane Australia
Posts: 154
Thanks: 0
Thanked 0 Times in 0 Posts
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!
________
Web shows

Last edited by cranky; 09-11-2011 at 01:10 AM.
Reply With Quote
  #2  
Old 05-28-2010, 09:03 PM
greg409's Avatar
Senior Member
 
Join Date: Jul 2006
Location: west of chicago
Posts: 739
Thanks: 0
Thanked 1 Time in 1 Post
Default

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
Reply With Quote
  #3  
Old 05-28-2010, 09:13 PM
cranky's Avatar
Senior Member
Thread Starter
 
Join Date: Sep 2009
Location: Brisbane Australia
Posts: 154
Thanks: 0
Thanked 0 Times in 0 Posts
Default

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.
________
Laguna Heights Condos

Last edited by cranky; 09-11-2011 at 01:10 AM.
Reply With Quote
  #4  
Old 05-29-2010, 08:45 AM
antichrist's Avatar
Senior Member
 
Join Date: Sep 2007
Location: Georgia, USA
Posts: 5,236
Thanked 40 Times in 36 Posts
Default

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.
Reply With Quote
  #5  
Old 05-29-2010, 07:58 PM
greg409's Avatar
Senior Member
 
Join Date: Jul 2006
Location: west of chicago
Posts: 739
Thanks: 0
Thanked 1 Time in 1 Post
Default

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
Reply With Quote
  #6  
Old 05-30-2010, 01:31 AM
cranky's Avatar
Senior Member
Thread Starter
 
Join Date: Sep 2009
Location: Brisbane Australia
Posts: 154
Thanks: 0
Thanked 0 Times in 0 Posts
Default

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!
________
California dispensary

Last edited by cranky; 09-11-2011 at 01:11 AM.
Reply With Quote
  #7  
Old 05-30-2010, 09:24 AM
Spike555's Avatar
Senior Member
 
Join Date: Jun 2007
Location: Grand Rapids MI
Posts: 26,212
Thanks: 0
Thanked 22 Times in 15 Posts
Default

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.
Reply With Quote
  #8  
Old 05-30-2010, 09:51 AM
antichrist's Avatar
Senior Member
 
Join Date: Sep 2007
Location: Georgia, USA
Posts: 5,236
Thanked 40 Times in 36 Posts
Default

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!
Reply With Quote
  #9  
Old 05-30-2010, 02:08 PM
greg409's Avatar
Senior Member
 
Join Date: Jul 2006
Location: west of chicago
Posts: 739
Thanks: 0
Thanked 1 Time in 1 Post
Default

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
Reply With Quote
  #10  
Old 05-30-2010, 06:23 PM
cranky's Avatar
Senior Member
Thread Starter
 
Join Date: Sep 2009
Location: Brisbane Australia
Posts: 154
Thanks: 0
Thanked 0 Times in 0 Posts
Default

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.

________
ShyRoxanne

Last edited by cranky; 09-11-2011 at 01:11 AM.
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Labor cost to replace timing cover, timing chain, etc A5scott Discovery II 15 07-11-2015 07:25 PM
1998 range rover se 4.0-timing chain or timing belt Martin Rodriguez General Tech Help 1 02-25-2014 08:55 PM
Manual ignition timing reset tophur Discovery II 12 02-06-2008 07:19 PM
Ignition Timing tico21 General Tech Help 2 01-25-2008 11:58 PM
Ignition Timing marks chelo Range Rover 1 03-23-2006 04:39 PM


Tags
31, 39, 555, adjustment, advance, change, chip, discovery, distributor, engine, ignition, land, landrover, rover, timing

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 02:25 AM.


LAND ROVER and its logo are the registered trademarks of Land Rover. Land Rover is not affiliated with LandRoverForums.com.