Helicoil in upper cam housing - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 15 Old 11-21-2018, 08:50 PM Thread Starter
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Helicoil in upper cam housing

Just purchased a 2007 wee without any maintenance history. While carrying out the valve adjustment I found that the rocker cover bolt was came out abnormally. Someone damaged the threads and put some kind of thread maker in the hole. I am thinking to put a helicoil in the upper cam housing. M8-1.0 fine metric thread. There seems to be a lot of side wall on the hole so it should work. The other fix is to buy a new head which seems overkill. Has anyone came across this before. Thanks

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post #2 of 15 Old 11-21-2018, 10:44 PM
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Cgp, this is what I use when dealing with stripped threads, damaged thread bores, etc:
++ TIME-SERT Official Threaded inserts for stripped threads, blown out sparkplugs,

Helicoils are cheaper, but Ive seen them come out with the bolt upon disassembly.
Time-serts, when properly installed, literally become part of the head, pan, block, whatever. Ive used them in spark plug threads, aluminum oil pan drain plug threads, and aluminum engine block cylinder head bolt threads.
A Helicoil is basically a "Slinky", the time-sert is a closed solid threaded bushing. that is expanded from within at both the top and bottom of the thread bore. It wont strip out of the bore like a Helicoil can. I have both Helicoils and Time-serts, and whenever possible, I use the Time-sert.
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post #3 of 15 Old 11-22-2018, 08:52 AM
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Time serts are the best out there!

But in a low load application I would not hesitate to use a Heli-coil. High strength loctite keeps them in place. Available about anywhere.
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post #4 of 15 Old 11-22-2018, 02:17 PM
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"High strength loctite keeps them in place"

Not always, as Ive had helicoils come out with the bolt when Red Loctite and even Loctite Stud & Bearing mount was used. Especially if the threads were damaged and some sort of "thread maker" was put in the thread bore, which gives me a mental picture of an enlarged and damaged thread bore. NEVER a problem with Time-serts.

Then again, the Helicoil cost is attractive compared to a Time-sert. If I had to do a quick repair, and cost/time is an issue, and the owner insisted, then I MIGHT use a helicoil if I had to.
For my own vehicles I and other's motorcycles I service, I use Time-Serts only.
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post #5 of 15 Old 11-22-2018, 03:21 PM
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I remember reading about someone else stripping threads on the head. May have been a cam bolt hole.

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post #6 of 15 Old 11-22-2018, 03:44 PM
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Well...the main problem I have seen is people working on things that either have no feel for torque, or wont own an in-lb torque wrench because they think that have a feel for torque. The net result is the same.

Outside of exhaust nuts/bolts, I usually use a 1/2" 0r 3/8" drive air-ratchet, bigger items I use an air-or electric impact wrench for disassembly. But on assembly, I always run them down with the same tools and I hand-torque everything there is a spec for. And in cases of no spec, there is always a bolt size/torque spec chart in a service manual.
It was somewhat amusing/pathetic watching alleged techs start bolts with an impact, realize they got the bolt cross-threaded, and figured..wth, and just ran the bolt in regardless. If it didnt break or strip on the way in, they were good to go. Until the next poor unfortunate- that had to take it apart--namely ME--had to deal with what they mutilated.
You do learn what torque feel like before the bolt or threaded bore gives up. But even at that...I use a torque wrench during assembly. The time used in doing so is far less than the time involved in repairing threads.
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post #7 of 15 Old 11-22-2018, 09:52 PM
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I hardly ever touch an air tool unless I am breaking something big loose.

Hand tools and a torque wrench.
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"If its not broke yet, it can still be fixed"
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post #8 of 15 Old 11-22-2018, 10:12 PM
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ST, you'd change your tune real quick of you had to deal with 24 oil pan bolts and 28 timing cover bolts day in/day out.
I no longer have to do that since I'm now on my time, but you learn where to save time and where to take your time. It becomes a way of life.
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post #9 of 15 Old 11-22-2018, 11:06 PM
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I don't do it for a living anymore. When I did it was on power-sport equipment and there was more stuff torn up with power tools than time saved.

For auto-mechanics I could see the value.
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post #10 of 15 Old 11-23-2018, 01:44 AM
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ST, add to that the motorcycle owners Ive dealt with that possessed a 1/2" ratchet only, 2 extensions, and a 1/2" to 3/8" adapter, followed by a 3/8" to 1/4" adapter, and 1/2", 3/8" and 1/2" sockets. Can you say.."Stripped engine oil drain plug threads", or "stripped spark plug threads"? I sure can...and did. No power tools involved in those cases.
The best...or worst, depending on your point of view was the owner of a Honda CBR 954 and a Yamaha R6 owner that left his Yamaha countershaft sprocket loose, yet stripped out a spark plug thread on his 954. Time-sert insert took care of the spark plug threads, and a thread file cleaned up the countershaft threads.

Last edited by MAZ4ME; 11-23-2018 at 01:52 AM.
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