Date registered: Mar 2004
Vehicle: 84 500SEL AMG, 90 560SEC AMG, 85 500SEC AMG Widebody
Location: Atlanta, GA
Mentioned: 3 Post(s)
Quoted: 77 Post(s)
Helicoils are great repairs, no question. For $16, though, the OP can try the tool he bought. If that doesn't fix the threads (straighten them out sufficiently), then he can always fall back to helicoils. But even helicoils will drop some cuttings no matter how careful you are. Most of the debris would get sucked out through the exhaust, and the metal is aluminum, plus Murphy's Law applies to car repairs with great frequency. Finally, getting a helicoil kit on #8 or #4 is NOT easy to accomplish given the very tight work area with the head on the block!
If I had no choice but to helicoil the head, I would take the head off without hesitation.
2009 W211 E63
1984 500SEL AMG -5.4L, Sebring exhaust, full suspension, 2.82 LSD, 8"/9" wheels, Recaros, door wood, Clarion rack stereo. Anthracite Grey/Black
1985 500SEC AMG Widebody, 199/278, 5.4L DOHC 32v, Sebring, suspension, fridge
1990 560SEC AMG 6.0L, 149 Arctic White/Blue
1994 E500, 147 Polar White/Grey
1990 560SEC, 199 Blue Black/Black (Japan)
1991 560SEC, 040 Black/Palomino
1961 220SEb Coupe
Last edited by alydon; 03-14-2019 at 11:15 AM.