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Restoration & Repair Tips Board

4 Cylinder TDC timing swap wires 180?

Author  [Modern View]
Kbdp

08-18-2012 11:03:29
67.239.99.38



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Took the distributor out of the case 440 to install points and didn't pay attention to the rotor position. I did mark the outside alignment of the distributor but now I realize I needed to do both. Manual says there is a mark on the flywheel "IG" to preposition before I drop the distributor back in with. I can't find the IG mark and the flywheel is pretty clean so I am using the "DC" mark. In the manual picture the DC and IG marks seem only 2-4 degrees off anyway. I know I have a 50 50 chance of finding the compression stroke and I am feeling for the puff of air out of the spark plug hole. If I get it wrong, instead of pulling out the distributor AGAIN can I merely swap all the spark plug wires on the distributor cap 180 degrees? Reason I ask is it is a bear to get the distributor in/out because of a stripped clamp screw. I have always wondered if you could swap the plug wires 180 degrees if you end up with the initial flywheel position at TDC of the exhaust stroke.

Thanks! It will satisfy my curiosity and save me some trouble.

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John in la

08-19-2012 06:39:31
67.35.255.89



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 Re: 4 Cylinder TDC timing swap wires 180? in reply to Kbdp, 08-18-2012 11:03:29  
You can put the plug wires any where on the cap as long as the # 1 wire is over the rotor when #1 is at tdc compression.

Bring #1 up on the compression stroke with the finger in spark plug hole feeling for puff of air.
Try to get #1 at tdc from your flywheel marks.
Remove the cap and see where the rotor is pointing.
Put the #1 wire in what ever hole in the cap that will be just above the rotor tip when the cap is installed.
Wire the cap with the other wires using your firing order.
This will get you close enough it will start and you can adjust from here with a timing light or by ear.

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ASEguy

08-19-2012 04:48:26
68.186.162.134



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 Re: 4 Cylinder TDC timing swap wires 180? in reply to Kbdp, 08-18-2012 11:03:29  
Yes you can. It can work provided you are not off a tooth. I ran into those type of situations a few times in a shop. Those can be hard to find if you are diagnosing a running rough problem because we assume they are correct. Assuming can bite you. Gerard



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JMOR

08-18-2012 12:21:17
72.181.173.171



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 Re: 4 Cylinder TDC timing swap wires 180? in reply to JMOR, 08-18-2012 11:03:29  
Quoting Removed, click Modern View to seeYa got me. I will agree! :oops:



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JMOR

08-18-2012 11:18:53
72.181.173.171



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 Re: 4 Cylinder TDC timing swap wires 180? in reply to JMOR, 08-18-2012 11:03:29  
" can I merely swap all the spark

plug wires on the distributor cap 180 degrees?" Depends on our understanding of that '180 statement'. It can not mean moving each one to the opposite side of cap, BUT MUST mean moving each one two positions around the face of a clock (either CW or CCW is fine).



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Kbdp

08-18-2012 11:54:20
67.239.99.38



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 Re: 4 Cylinder TDC timing swap wires 180? in reply to JMOR, 08-18-2012 11:18:53  
Unless I don't understand something, on a 4 cylinder cap the rotating 2 positions gives the same result as if you just took each of the four wires and swapped it 180. I just thought I would try and get you to agree on that as sometimes I might be missing what you are trying to tell me. Thanks.



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