Thursday, May 28, 2009
I was in a bit of a rush when I put thing back together, so instead of fixing it, I locktighted the bolt and snugged it down. The other day when I went to start my car, all I heard was a buzzing sound as the starter pinon gear ground against the flywheel teeth. The lower starter bolt had fell out and the starter was now dangling by the top bolt, barely. Long story short, I make it home and begin to repair the threads.
Helicoils resemble spring coils, wound with stainless steel wire of special cross sectional dimensions, to match the threads they are repairing. The inside of the spring coil matches the repaired thread, the outside matches the next thread size up. Helicoils are often times inserted into a bolt hole from the factory to increase the strength of a threaded hole. An example of this is an aluminum flywheel. To increase the holding strength of the bolts, each hole is helicoiled. The stainless steel wire threads are much stronger than those provided by aluminum ones.
A helicoil repair kit includes several helicoil springs, a tap, and a HC insertion tool, basically a long bolt with a square tip. The first step is to clean out the mangled threads of the existing hole. This is most easily accomplished with a drill and the proper size bit. A drill and tap chart will tell you how big of a hole to drill for the size of the tap. Be careful drilling. Do not ovalize the hole.http://www.kramerusa.com/DrillTapChart.htm
You drill the hole not for the size of your thread, but for the tap, or the outside of the HC. The tap size should be marked on the tap provided in the kit. I had very limited space, so I was not able to clean out the hole with the traditional method. Instead I took the old bolt and a hammer and pounded out the remaining threads. The hole was not exactly the right size, but aluminum cuts easily with a tap.
The next part is to tap the hole. The kit does not include a tap handle, which is very important, so try to get one before you start the job. Otherwise a pair of vice grips sorta work. Starting the tap is the hardest part. Try to make the tap as centered as possible, apply pressure and keep turning until it bites. When cutting threads, turn the tap 2 turns in, one turn out. Use cutting oil, and make sure the hole does not fill with metal chips.
The last part is to insert the helicoil. Thread the HC all the way onto the insertion tool. Apply lock tight to the OUTSIDE of the HC threads. Attach tap handle to the insertion tool. Screw till the HC sits flush with the hole. Let the locktight dry, apply anti seize compound to the bolt and install. There is a little tang at the bottom of the HC that some say should be busted off, but I did not, and do not think it is important. It is important that the bolt does not go deeper than the HC.
Here is another write up with some pictures.
For the top hole there was no way I was going to be able to thread a tap in due to space limitations of the tranny still being in the car. I also found that the threads were mostly good, just the first few were stripped out. So instead of repairing the thread, I inserted a stud, a bolt with thread on both ends. Since the stud was longer than the bolt, the stud make a solid thread engagement with the remaining good threads. Studs also do not come lose as easily. I am not sure why, and have not reasoned out a logical explanation.
Wednesday, May 27, 2009
Though you all know, I still need to write this next part. Devices such as this one often time gives the user a false sense of security. One might place themselves in dangerous situation they otherwise might not because of the security gained by a PLB type device. A PLB is not a substitute for sound judgement, experience and preparation.
Tuesday, May 26, 2009
If you have been a true X-men comic book fan the content of the story is nothing new. It follows the story laid out in X-men Origins comic book Stan Lee wrote many years ago. But seeing the story unfold on the big screen was a real treat. Sure, some die hard fans do not like the silver screen interpretation of a classic, they usually don't; but I am a 21st century digital kid: I love movies.
Though filled with Hollywood booms and bangs, there was something different about this film. The movie was made to tell a story, and that's it! It wasn't trying to sell anything, wasn't setting itself up for a sequel (though all comic books stories are set up for sequels), wasn't trying too hard to impress. The story itself was so enthralling that THAT was enough. In fact it is one of the rare cases that the movie came after the merchandising. Sure they will be selling a few Wolverine toys and lunchboxes because of the movie, but all selling of "stuff" had been done already with the release of all the previous X-men movies. This movie in fact was truly just for the fans.
Thursday, May 21, 2009
It rained on and off and on the entire weekend, making this the muddiest desert trip thus far. But the rain didn't seem to dampen our sprits too much. The weather was relatively warm, and the volume of rain was not that great; that is why it is a desert!
Heading north on Solider Meadow Road, a nice graded gravel road, we made good time and were soon north of the Black Rock Desert Playa. It was close to three in the morning, so we pulled off a spur road and made camp.
My blog is back logged with a bunch of articles that I have been meaning to write. But it is so easy to pass up the difficult trip reports and post stupid shit like this. Funny but definitely stupid.
Update: This reveiw has been so popular that it has made it to the BBC new.
Monday, May 18, 2009
Friday, May 15, 2009
Up next on the auction block we have a... Maybe I have found my true calling in life: a used car sales man.
Thursday, May 7, 2009
May is National Bike Month, and the 11-15th is bike to work week. In the Tahoe area it is quite a big deal. Work teams sign up and compete for total miles, total trips, and percent participation. There are prizes, and local vendor give free coffee and bike tune ups. Most local communities have some type of program. I know when I lived in Fremont, the local REI gave out water bottles and power bars.
My goal this year is to remove 200 vehicle miles and 20 vehicle trips from the roadways, by commuting on my bike. 37 miles to and from work. 3 miles to and from Town for lunch. 5 days a week. What is your bike to work week goal??
Update: today is Friday and I have ridden a total of 180 miles so far this week. I think I will reach my goal of 200 miles. Go bikers ride!
My company has won the team event. We are going to South Lake Tahoe this evening to claim our trophy!!
Wednesday, May 6, 2009
The pressurized air pushes the fluid down and the hose allows it escape. I usually use one modified bottle and just keep filling it. Bottles with a large cap that allow both holes to be drill in it work very good. All you have to do is swap out the bottle.
Here are two write ups on oil change I have referenced before:http://tunfs.yuku.com/forum/viewtopic/id/903