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Dizzy fitment, exhaust or compression stroke check 

 

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 Post subject: Dizzy fitment, exhaust or compression stroke check
Posted: Fri Sep 12, 2008 11:35 pm 
Getting Side Ways
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I've read this before, but not quite having done it, it hasn't quite sunk in.

When fitting the dizzy, i know you should remove the no.1 spark plug and rotate the engine until the no.1 piston is at TDC. But how to know if it is on the exhaust or intake stroke without removing the rocker cover or manifolds?

 

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wrecking 9/97 EL fairmont sedan burgundy 6cyl auto 270k modBAintake

Last edited by relaxed_diplomacy on Sat Sep 13, 2008 11:01 pm, edited 1 time in total.

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Posted: Sat Sep 13, 2008 12:04 am 
Getting Side Ways
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stick your finger in the spark plug hole, while rotating the engine with a spanner. You will feel air pushing past your finger as no1 piston travels up(compression/intake stroke)

cheers....

 

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Posted: Sat Sep 13, 2008 10:32 pm 
Getting Side Ways
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Age: 42

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Location: seaspray
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Okay, thanks.

I guess i should have previously said exhaust or compression stroke.

The exhaust stroke wouldn't generate any pressure against your finger all the way to TDC.

Whereas the compression stroke would generate pressure all the way to TDC.

 

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wrecking 9/97 EL fairmont sedan burgundy 6cyl auto 270k modBAintake

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Posted: Mon Sep 15, 2008 9:22 pm 
Getting Side Ways
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Age: 42

Posts: 1343

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Ride: EL fairmont offroader

Location: seaspray
VIC, Australia

I fitted the dizzy properly today.

First i took out no.1 spark plug, then inserted my finger in the hole, then rotated the engine by turning the harmonic balancer bolt clockwise. I immediately noticed air pushing out. Knowing i was on the compression stroke, i then inserted a screwdriver in the spark plug hole and rotated the engine until i found TDC.

I then lined the dizzy up with the rotor pointing towards "start" and inserted it into a position that upon completion would allow maximum adjustment either way. I found that it wouldn't go in. No amount of fiddling helped. I had a look and noticed a hex in the centre of the dizzy shaft, i reckon this was not lining up. So it seems you don't have the choice of every cog on the dizzy. I then did my best with it and it will hopefully provide enough adjustment.

 

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wrecking 9/97 EL fairmont sedan burgundy 6cyl auto 270k modBAintake

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