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Engine How to mark distributor properly before loosening and moving?

  • Thread starter Thread starter dqureshi06
  • Start date Start date Nov 5, 2024
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dqureshi06

Member
Mar 25, 2024
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18
Virginia
Nov 5, 2024
#1
  • Nov 5, 2024
  • #1
I’m trying to move my distributor so the TFI module can be out of the way so I can tighten my lower thermostat housing bolt. Is drawing a straight line down the distributor and the block sufficient?
 

AeroCoupe

lube between the nut and the face. I know my lubes
Founding Member
Oct 28, 2001
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4,014
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Claremore, OK
Nov 5, 2024
#2
  • Nov 5, 2024
  • #2
Pop the cap off and mark where the tip of the rotor is pointing on the body of the distributor. Mark the base of the distributor and continue that mark onto the block.

Goes without saying but don’t rotate the motor.
 
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dqureshi06

Member
Mar 25, 2024
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Virginia
Nov 5, 2024
#3
  • Nov 5, 2024
  • #3
Ok thanks. The tip of the rotor and the distributor itself can turn separately then right? As in you can turn the tip and the distributor without necessarily turning the other?
 

AeroCoupe

lube between the nut and the face. I know my lubes
Founding Member
Oct 28, 2001
5,888
4,014
183
Claremore, OK
Nov 5, 2024
#4
  • Nov 5, 2024
  • #4
Once the distributor is installed and the base is firmly against the block the rotor will not move unless the motor moves. This is due to the gear on the bottom of the distributor engages the gear on the camshaft and the distributor gear is pinned to the distributor shaft which the rotor is connected to. The body of the distributor will rotate clockwise and counter clockwise unless the bolt that secures the distributor is tightened to the block. Make sense?
 

AeroCoupe

lube between the nut and the face. I know my lubes
Founding Member
Oct 28, 2001
5,888
4,014
183
Claremore, OK
Nov 5, 2024
#5
  • Nov 5, 2024
  • #5
So when you in’s free all a distributor on a freshly built motor you bring the motor up to TDC and install the distributor such that the rotor pints to the #1 cylinder on the rotor cap. You then move the body of the distributor to set the timing.
 
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dqureshi06

Member
Mar 25, 2024
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Virginia
Nov 5, 2024
#6
  • Nov 5, 2024
  • #6
AeroCoupe said:
Once the distributor is installed and the base is firmly against the block the rotor will not move unless the motor moves. This is due to the gear on the bottom of the distributor engages the gear on the camshaft and the distributor gear is pinned to the distributor shaft which the rotor is connected to. The body of the distributor will rotate clockwise and counter clockwise unless the bolt that secures the distributor is tightened to the block. Make sense?
Click to expand...
Y e s
 

flynndawg

Member
Dec 2, 2009
34
19
18
east tn
Nov 9, 2024
#7
  • Nov 9, 2024
  • #7
my 89 5.0 has a factory 'ding' mark so you know where to align it... did they all not come that wat from the factory... ???
 

89ripper

Founding Member
Jun 3, 2002
926
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Rockford, Illinois
Nov 9, 2024
#8
  • Nov 9, 2024
  • #8
flynndawg said:
my 89 5.0 has a factory 'ding' mark so you know where to align it... did they all not come that wat from the factory... ???
Click to expand...
Please show "ding" mark you are talking about
 

AeroCoupe

lube between the nut and the face. I know my lubes
Founding Member
Oct 28, 2001
5,888
4,014
183
Claremore, OK
Nov 9, 2024
#9
  • Nov 9, 2024
  • #9
I think it’s the notch at the base of the distributor. Found this pic of it and my OEM has it as well.



I have read somewhere the significance of the mark but don’t remember off hand. I want to say it lines up with the bolt hole for the hold down but I’m not 100%.
 
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89ripper

Founding Member
Jun 3, 2002
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Rockford, Illinois
Nov 9, 2024
#10
  • Nov 9, 2024
  • #10
AeroCoupe said:
I think it’s the notch at the base of the distributor. Found this pic of it and my OEM has it as well.



I have read somewhere the significance of the mark but don’t remember off hand. I want to say it lines up with the bolt hole for the hold down but I’m not 100%.
Click to expand...
I saw that too, couldnt remember if I did that as a teen or not. Been too many years!!
 

91GTstroked

15 Year Member
Jun 14, 2007
503
282
93
Nov 12, 2024
#11
  • Nov 12, 2024
  • #11
AeroCoupe said:
I think it’s the notch at the base of the distributor. Found this pic of it and my OEM has it as well.



I have read somewhere the significance of the mark but don’t remember off hand. I want to say it lines up with the bolt hole for the hold down but I’m not 100%.
Click to expand...
All of the OEM distributors have that, same with the block. Im not sure if aftermarket distributors have that notch?
 
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