 Spark plugs. How many uses? |
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| bandjoey |
 Sep 16 2012, 11:21 AM
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#1
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bandjoey  Group: Members Posts: 4,926 Joined: 26-September 07 From: Bedford Tx Member No.: 8,156 Region Association: Southwest Region  |
How many times can I clean and reuse a spark plug when the tip and insulator are still in good shape?
My dad reused his over and over in the DeSoto. |
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Replies(1 - 3)
| gothspeed |
Sep 17 2012, 09:42 AM
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#2
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Senior Member Group: Members Posts: 1,539 Joined: 3-February 09 From: SoCal Member No.: 10,019 Region Association: None |
I just cleaned and gapped mine in my old toyota ......... I think this practice may be limited to the copper design plugs. The spark generally jumps from the edge of the copper tip to the side electrode and in copper, it tends to wear those edges quite quickly ..... so in my opinion, for non peak performance applications, it can be done a couple times ......... as long as the tip and the electrode are in decent shape.
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| rwilner |
Sep 18 2012, 07:33 AM
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#3
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No Ghosts in the Machine Group: Members Posts: 953 Joined: 30-March 10 From: Boston, MA Member No.: 11,530 Region Association: North East States |
spark plugs are $2 each. Just replace them.
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| Katmanken |
Sep 18 2012, 12:08 PM
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#4
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You haven't seen me if anybody asks... Group: Members Posts: 4,738 Joined: 14-June 03 From: USA Member No.: 819 Region Association: Upper MidWest |
High voltage sparks like to jump from a sharp edge , not a rounded surface. Not only do the sharp edges erode from sparking, but the more you clean them, the more rounded the edges get, and the worse they work. Old piston engine planes (like the B-17) used to run 4 prong sparkplugs to ensure smooth running and reduced maintenance.
New plugs are nice and sharp, and explain why a tuneup can result in an even idle. |
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