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Fixing the old truck

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#1255346 02/17/2018 9:24 PM
Joined: Nov 2005
Posts: 123
E
Shop Shark
Shop Shark
E Offline
Joined: Nov 2005
Posts: 123
Redid the head on a 56. 235. Putting new things on trying to get things right. Is it important to put a new distributor vacuum advance on or can I run with get old one

evac34 #1255347 02/17/2018 9:35 PM
Joined: Sep 2001
Posts: 29,262
Bubba - Curmudgeon
Bubba - Curmudgeon
Joined: Sep 2001
Posts: 29,262
If the old one worked, use it.

evac34 #1255353 02/17/2018 10:38 PM
Joined: Jul 2010
Posts: 592
M
Shop Shark
Shop Shark
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Joined: Jul 2010
Posts: 592
There is a simple way to test the old one...blow into it and then suck on it! If the diaphragm is good, you'll get positive resistance when you blow and suck and will feel it hit its stops. If the diaphragm is bad, you'll be able to blow or suck air past it. You can do it with a Mityvac pump, but the lips work just as well. Back in the day when cigarettes were more common, I've seen folks blow cigarette smoke into the vac advance. If smoke came out, it had a bad diaphragm.

Matt

evac34 #1255376 02/18/2018 1:10 AM
Joined: Mar 2010
Posts: 10,059
5
Renaissance Man
Renaissance Man
5 Offline
Joined: Mar 2010
Posts: 10,059
A working 60 year old original will likely outlast a Chinese replacement.


1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
evac34 #1255377 02/18/2018 1:16 AM
Joined: Sep 2001
Posts: 29,262
Bubba - Curmudgeon
Bubba - Curmudgeon
Joined: Sep 2001
Posts: 29,262
Nice, Matt
Correct, Carl
Use it, if it passes the sucking test, ecac34


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