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Does anyone have any ideas how to fix the bolt hole that keeps the igntion coil in place on a 2006 Cayenne Turbo? I noticed the gold looking bolt that keeps the ignition coil in place is stripped and the bolt holding it down will not go in anymore unless the bolt hole threads are re threaded. Does anyone know or recommend Helicoil thread repair kits?

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Thanks Where can i purchase it? also how will i know what size insert

Most good auto parts shops carry them, and they can help you with the size. Shops like Fastental (all they sell is fasteners) are an excellent source as well, and the inserts are also available on line.

Edited by JFP in PA
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If you just need to do one or two threads I think autozone has a helicoil kit with three inserts for one specific size for about $20 (as for size my guess without looking at PET is it is going to be M6 x 1.0, but you can take a bolt into a hardware store to confirm by threading a nut onto it first). I don't remember if that contains the lever required for the tap, but I do think it has the special tap and insertion tool.

Be extremely careful drilling into your block though. If you don't have a jig you can fasten to make a perfectly level and straight cut, you need to be very accurate with a hand drill and certainly install a drill stop in the bit (you can wrap tape around the bit if you don't have a metal stop). Use a high speed steel bit and turn it at a very low speed. Be sure to vacuum and collect all of the shavings produced from the drilling and tapping operations. Metal shavings and engines don't agree with each other very well.

Worst case if you mess up, you can go to a bigger size helicoil - ASSUMING there is enough meat to go bigger...

Practice is a good idea especially if your first time is on an engine block.

Find a piece of aluminum somewhere outside the car and get used to how to do it.

You can also pay a shop to do it for you, depending on difficulty to access they may charge anywhere between $25 and $100 (or more) depending on how much tear down is required.

Edited by logray
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