Hi, just back from the garage having been told 1 of my spark plugs had a piece drop off, presumably into the cylinder, and also worked so loose that it stripped the thread. The suggestion being to have a Helicoil repair. Anyone tried fitting a Helicoil in situ, a local engine specialist will fit one for £35+Vat, but only if the cylinder head has been removed. Anyone recently removed a cylinder head - easy/ difficult job? Thanks, Dermot
Hm was say how well you know exactly what the tool and you have the this also? Simple is not and you also have the options? Hall or so? Everything can be repaired.
I've fitted loads. There's no way I would attempt to do that to a plug hole in-situ. However I've two suggestions - 1. If the thread is damaged but not stripped you can get a reverse thread tap that is inserted fully, expanded, then wound OUT to re-dress the thread. These are available specifically for plug holes where swarf falling in would cause damage. Smear of grease around the hole will help catch debris as the tool is removed. 2. If the thread is stripped, get a timesert repair rather than a helicoil. Cheers
