Can putting short shank spark plugs in my 2011 Chevy Malibu cause the coil panks to burn out

Asked by Jul 07, 2018 at 10:05 PM about the 2011 Chevrolet Malibu

Question type: Maintenance & Repair

6 Answers

2,685

By shank do you mean the piece that prodtrudes into the cylinder or the porcelain top that touches the coil? For the record you should always use the exact plug make and part number that your owners manual calls for. Tens of thousands of dollars has been spent by the manufacter to come up with the perfect plug for your engine, any used car ive ever bought that was running anything responed really well to switching them out for the factory plugs. If you have ALOT of modifications to the motor then this does not apply, even cold air intakes, exhaust systems and minor timing changes rarely warrants having to run anything other than stock

145,525

Using plugs that are too short could lead to all sorts of problems but probably not to coils going bad.

2,685

You don't think the coils would be under extra strain if they had to jump a 1/2" gap to get spark to the plug?

For starters I had a chevy dealership mechanic change the plugs and wires and every since then which was about 6 months ago, I have had a problem with it misfiring, i took it back and they couldn't fine anything wrong with it. So now its really misfiring under a load ( with the ac on)so we changed the plugs and it still is misfiring, but when we took the old one out they were shorter than the new ones ( which what it call for) her is a picture the one one the left is the one the dealership put in and the one thats on the right is what it calls for

So thats why i was asking if it would hurt the coil packs

2,685

I can't believe something like that would happen, especially at a dealership.... considering it is the plugs reach into the cylinder and not the stalk of the plug that was too short chances are that it wouldn't have hurt a coil pack but that doesn't mean that one hasn't naturally gone bad. Hopefully your problem is nothing major, mechanics like the one that changed your plugs in the first place give all mechanics a bad name and make it hard for consumers like yourself to trust them

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