I have a 2017 vintage speedster with the 1915 engine. somebody stripped out one of the spark plug holes and put in a Heli coil.  While changing the spark plugs, the Heli coil came out!  would anybody know the correct size Heli coil to put back in?  Thanks

Original Post

I vote for a time-cert, too, but you may be scared off by the price for a 14mm X 1.25 repair kit at $85 bucks (Amazon).  The insert itself is a $5 item but you need the tools to clean the existing hole threads and then another tool to properly install the insert.

Same thing for a Helicoil, but the kit is around $30 bucks.

The difference you can already hold in your hand - the Helicoil might come out the next time you remove the plug (or maybe blow both insert AND plug out while on the road).   The Time-Cert won't.

I've done this on a VW sedan with good luck, but there is a LOT more room in a VW than in the back of a Speedster.  If it were mine, I would drop the engine (about an hour to get it out and onto the floor) and do the insert out in the shop.  Not totally necessary, but certainly easier.

Yeah.....  I know you didn't want to hear that, but you want to do it right, ok? 

Add Reply

Likes (0)
Post Content
×
×
×
×
×