secure1347

I accidentally over-torqued my engine carrier bolts and stripped the lower right hole. I read my notebook wrong and torqued them to 65 ft lbs instead of 48 ft lbs. These are M10 x 70 bolts. Any suggestions for what I can do? Should I attempt to use a helicoil kit? Or potentially use a longer bolt? I'm not sure how far these holes are drilled/tapped. I also have the same problem on one of the header bolts (though I never over torqued them). Sound like others have used helcoil kits on those. Would appreciate any recommendations. I was pretty devastated to find these issues tonight. I've been working on rebuilding this engine for a long time now.

Bernard IV

Yah I'd use a helicoil. Pretty easy fix really. Measure based on the bolt depth.

powdrhound

Use Timesert for a proper repair....

theprf

A timesert will require overdrilling the stripped hole to M14 and screwing in a threaded bushing. If there is enough room to go that big it's a better repair. A helicoil will only require overdrilling a few mm. Either way you will need to remove the water pump housing again to get access to the case.

powdrhound

I did a Timesert repair on an engine carrier bolt in that exact same area a few years back. There is plenty of meat there. No issues.

secure1347

Thanks all. I wasn't getting my notifications on the later replies so I ended up going with the helicoil option. However, it all seemed to work out and I was able to torque it to the required 48 ftlbs without issue. I'll consider the time serts for any issues in the future.

s65e90

Consider trusting your own instincts versus worrying about specific torque values. I rarely do and none of my cars have fallen apart yet.

Bernard IV

You should always use the designated torque spec. Don't use intuition, know the spec.

my04996tt

Agree, there’s a reason for following specs, especially with cars of this type.

s65e90

A car is a car. Hard to see what makes a Porsche any different. In 25 years of turning wrenches, nothing harmed.

my04996tt

So car manufacturers torque specs have no value… So a Porsche is the same as a Toyota..
I’ll keep using manufacture torque specs when working on my cars. I value my life and cars too much to wing it and guess that lug nuts are tight enough and other critical components are torqued correctly.
Throw in an occasional track day, I’m a lot more comfortable not having to think about did I under or over tighten something. Good luck..

s65e90

Rarely is not always, I always use at least 2-3 ugga duggas on the impact gun when putting wheels on. You'd be surprised how many people are not measuring everything.

TrillyPop

Ah the old torque wrench vs feel argument. I'm with my big winged brother...I have 3 torque wrenches but they almost never get used. Maybe on really low torque sensitive engine stuff, but for 99% of things I do it by feel, and have never had any issues.