Test a spark plug after a drop?!!!????!!!!
Thread Starter
Instructor
Joined: Jul 2011
Posts: 241
Likes: 3
From: Tampa FL
Test a spark plug after a drop?!!!????!!!!
My assistant was helping me and dropped a box of spark plugs on the floor (assistant is 5). 
the plugs are the tr55gp.
nothing looks cracked. Nothing rattles. Can I do an ohm check with this style plug and get a good reading?
many thanks everyone for the tips and help before I change the plugs and wires
the plugs are the tr55gp.
nothing looks cracked. Nothing rattles. Can I do an ohm check with this style plug and get a good reading?
many thanks everyone for the tips and help before I change the plugs and wires
Pro
Joined: Aug 2019
Posts: 596
Likes: 146
From: Minford, Ohio
The best test is to install it and see how it works. I would put it where it's easy to change if you have a miss. Start it up with the lights out after dark and look for arching in case the porcelain is broken.
Racer
Joined: Apr 2016
Posts: 335
Likes: 93
From: San Antonio TX
In aviation maintenance there is a saying that if you drop a spark plug once, you should drop it twice, the second time being into a trash can (and those plugs cost anywhere from 5-10 times as much as an auto plug). Plugs are quite susceptible to shock damage, which may not be immediately apparent. Depending on the internal design, the resistance may check out OK, even with significant damage. Up to you as to how to approach, the consequences of an initially undiscovered spark plug fault in an auto are significantly less than in the aircraft application.
Advanced
Joined: Sep 2020
Posts: 71
Likes: 26
From: Texas
2021 C4 of the Year - Unmodified Finalist
it's been a minute since i was tangent to aviation, but i can 100% confirm this saying and fully support the information provided in the follow up.
as for the assistant...think maybe he can be given some leeway. surely more spark plugs won't bust the cookie budget.
as for the assistant...think maybe he can be given some leeway. surely more spark plugs won't bust the cookie budget.
In aviation maintenance there is a saying that if you drop a spark plug once, you should drop it twice, the second time being into a trash can (and those plugs cost anywhere from 5-10 times as much as an auto plug). Plugs are quite susceptible to shock damage, which may not be immediately apparent. Depending on the internal design, the resistance may check out OK, even with significant damage. Up to you as to how to approach, the consequences of an initially undiscovered spark plug fault in an auto are significantly less than in the aircraft application.
Last edited by googliamoog; Feb 24, 2022 at 01:59 PM.
Thread Starter
Instructor
Joined: Jul 2011
Posts: 241
Likes: 3
From: Tampa FL
Well I think everyone is right and a new box is in order. I wasn’t hard on the helper for the record. They knew they did wrong and apologized a thousand times.
On another note my email stated that the wrong plugs were purchased but the post is missing is this the right plug for a 95 Lt1???
On another note my email stated that the wrong plugs were purchased but the post is missing is this the right plug for a 95 Lt1???
