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Clutch bolts and locktite



 
 
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  #91  
Old July 30th 18, 06:29 PM posted to rec.autos.tech
Vic Smith
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Posts: 953
Default Clutch bolts and locktite

On Mon, 30 Jul 2018 14:39:23 +1000, Xeno > wrote:

>On 30/7/18 3:50 am, dsi1 wrote:


>> I used one of those big Chilton multi-year/model manuals to change the timing belts on a Subaru. It was simple enough except they left out a step where you turn the crankshaft 360 degrees after installing one belt. This meant that one cam was 180 degrees out of phase with the other cam. It also meant that your engine wasn't going to start. That was a very bad mistake.
>>

>Yes, a very bad omission. I have seen similarly disastrous omissions and
>errors in those aftermarket manuals. Flywheel and clutch bolt torque
>settings switched for instance. That was an obvious error to a trained
>mechanic but wouldn't have been for an amateur.


When I rebuilt my 352 and put it together there was a random knock. Never even moved the
truck. I couldn't figure it out.
Finally decided to let it idle until it screamed, obviously wiping bearings.
It didn't take long, maybe 2-3 minutes of very erratic knocking. Dropped the pan, found
wipings in the new oil. Still had the rented engine hoist, so I pulled the engine again,
and tore it down. Found the cam lobes had been chipped. I spent about 15 minutes
searching the garbage can for the old fiber cam gear I had replaced with a new cast iron
one. Saw that the cast iron one had the 1/4" spacer I had reinstalled cast in with the
gear. Took the block back to the shop which had bathed it, and installed new cam bearings.
This shop had also miked the crank and bores and sold me the correct size bearings, cam,
rings, and lifters. The parts guy there felt bad that he hadn't warned me about the new
cam gear, and didn't charge me for a new cam. About 20 bucks. I was surprised at that -
figured I should have caught that myself. Hell, if it had been a day later, and the
garbage had been picked up, I would have had a hell of a time figuring out what was wrong.
That little fiasco cost me about a days work.
What I can't remember about the whole thing, is how in the hell I put that block in and out
of my '64 Bug 4 times for shop trips. I worked alone the whole time. Ah, youth!

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  #92  
Old July 30th 18, 07:38 PM posted to alt.home.repair,rec.autos.tech
Arlen Holder
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Posts: 98
Default Clutch bolts and locktite

On 30 Jul 2018 07:32:12 GMT, Xeno wrote:

> Definitely! That tyre shows distinct sidewall degradation that didn't
> happen overnight or in a week.


That's interesting because I work on this care (but not on that tire) and I
have always advised her (it's a college kid who lives away at college) to
keep it at 40 psi so ever since she bought it (a year ago) it was at 40psi.

Here's the only other photo she sent me, this on in situ, on the roadside:
<http://www.bild.me/bild.php?file=6543956tireoncar.jpg>

> Or that it had been run underinflated for months prior to being
> correctly inflated the week prior thereby prematurely weakening the
> sidewalls and setting it up for failure.


I know this car well as this kid is a neighbor's kid who has gone away to
school, and I repaired three of her five tires (the pictures are in this
newsgroup, where the last one was only about a month ago).

I can't speak for the history before a year ago, as that's when she bought
it (I helped her buy it too, where it's the third or fourth owner).

In the past year, I've patchplugged three of her five tires, the last one
only about a month or so ago (let me dig up the thread so I can give you
the exact date). For now, assume a month.

At that time, all five tires were at 40 psi because I'm meticulous that
way, and because this is a college kid who doesn't think about such things.
I know for a fact exactly which tires they are because I rotated them at
that time and worried about the fact that the front two and the spare were
the ones which each had one patch plug from me.

The rear two didn't have anything and didn't need anything, and the tread
was fantastic and they were holding air pressure or I would have noticed
that they weren't (since I look at her tires every once in a while - and no
- I didn't mount these except the ones I repaired).

So for them to be *underinflated* had to happen more than a year ago.

I picked out every bit of debris in each of her tires when I rotated them
(I always do where I have a pick in my tire repair kit) but I didn't
closely inspect the sidewall other than that it didn't show anything
obvious to me.
  #93  
Old July 30th 18, 07:38 PM posted to alt.home.repair,rec.autos.tech
Arlen Holder
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Posts: 98
Default Clutch bolts and locktite

On 30 Jul 2018 06:57:35 GMT, Scott Dorsey wrote:

> This is exactly how tires blow out when they are underinflated. You say that
> she checked the pressure last week, but that doesn't mean there wasn't a nail
> or sidewall puncture causing the tire to lose pressure slowly.


Wow. I wasn't expecting someone to say "underinflated" especially since she
told me she inflates them to 40psi even though the door sticker I had her
read says 29 psi. So, if anything, she would have been overinflated.

I had her check for nail holes and she said she didn't see any. I told her
to save the carcass for me (she was on a trip and won't be back for a few
days) so I could physically look at it when she returns.

She's pretty meticulous, so, I'm sure the tires weren't underinflated at
the time she was using them, but could they have been run chronically
underinflated by the previous owner (more than a year ago) and still blown
out yesterday (a year later)?

> Tires are wear items. You replace them now and then, you check them often,
> and sometimes they just fail. The government is not likely to be able to do
> much about that.


I have had many flats, but I've never seen a tire do that.

The AAA guy said to her (according to her) that there must have been
something wrong with the tire. He checked her spare before putting it on
and he said it was good (where the spare would have been checked with the
other tires last week and where I had repaired her spare with a patchplug
about six months ago).

I'm positive that the tire wasn't underinflated last week, and, in fact, it
was, if anything, at 40psi, unless, of course, there was a leak (which I
don't know about).

I have no idea if it was run chronically underinflated at some point in its
life though, so all I can say is that it likely wasn't underinflated in the
last week - unless - unless there is a nail hole (which I will look for).

I think it's odd that I've never seen a tire do that, nor, according to
her, did the AAA towtruck think it normal, and that you think it's normal.

I'm not saying you're wrong as I don't have the experience - where all I
can say is I have had, oh, I don't know, 40 or 50 flats, and none looked
anything like that (which is not much experience as a tire shop will see
much more).

I'll take the photo to a tire shop to ask them also, so I do very much
appreciate the advice since I realize 40 or 50 flats (I'm guessing at the
number) for me isn't all that much experience. (I should note that I have
repaired this neighbor's tires in the past, but this is DEFINITELY not one
of the ones I touched - the last one I did was right on the edge of her
sidewall - which I posted pictures of a month or two ago - and I repaired
the spare also - both with patch plugs.

At that time (we can look up the date of that thread), three of her five
tires were patched by me from the inside - but she confirmed this is not
one of them (I write on the tire with grease pen when I repair them and she
hated those markings because they were on the outside sidewall so it's
confirmed I never touched this particular tire except to fill it with air).
  #94  
Old July 30th 18, 11:23 PM posted to alt.home.repair,rec.autos.tech
Scott Dorsey
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Posts: 3,914
Default Clutch bolts and locktite

Arlen Holder > wrote:
>On 30 Jul 2018 06:57:35 GMT, Scott Dorsey wrote:
>
>> This is exactly how tires blow out when they are underinflated. You say that
>> she checked the pressure last week, but that doesn't mean there wasn't a nail
>> or sidewall puncture causing the tire to lose pressure slowly.

>
>Wow. I wasn't expecting someone to say "underinflated" especially since she
>told me she inflates them to 40psi even though the door sticker I had her
>read says 29 psi. So, if anything, she would have been overinflated.


Overinflation is just as bad, but I don't know how overinflated tires
fail because I have not really seen any of those. Underinflation is much
more common.

Overinflation also puts undue stress on the sidewall, but not in the same
way.

>> Tires are wear items. You replace them now and then, you check them often,
>> and sometimes they just fail. The government is not likely to be able to do
>> much about that.

>
>I have had many flats, but I've never seen a tire do that.
>
>The AAA guy said to her (according to her) that there must have been
>something wrong with the tire. He checked her spare before putting it on
>and he said it was good (where the spare would have been checked with the
>other tires last week and where I had repaired her spare with a patchplug
>about six months ago).


He's likely right. See any dry-rot cracks on the other tires? See any
sidewall damage anywhere?

>At that time (we can look up the date of that thread), three of her five
>tires were patched by me from the inside - but she confirmed this is not
>one of them (I write on the tire with grease pen when I repair them and she
>hated those markings because they were on the outside sidewall so it's
>confirmed I never touched this particular tire except to fill it with air).


So she's a person who is prone to running over nails frequently?
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."
  #95  
Old July 31st 18, 12:34 AM posted to alt.home.repair,rec.autos.tech
Arlen Holder
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Posts: 98
Default Clutch bolts and locktite

On 30 Jul 2018 15:23:49 GMT, Scott Dorsey wrote:

> Overinflation is just as bad, but I don't know how overinflated tires
> fail because I have not really seen any of those. Underinflation is much
> more common.


Here is a series of pictures of an inside patch-and-plug repair on that
same car (different tire but same model and date code I'm sure) in May of
this year, which I had posted to this newsgroup to ask if it was too close
to the sidewall.
https://u.cubeupload.com/ephXTU.jpg https://u.cubeupload.com/hL4S7k.jpg
https://u.cubeupload.com/dVRzSE.jpg https://u.cubeupload.com/QhfOze.jpg
https://u.cubeupload.com/QTSFM6.jpg https://u.cubeupload.com/QhfOze.jpg
https://u.cubeupload.com/Pf9S1J.jpg https://u.cubeupload.com/m7V4v8.jpg
https://u.cubeupload.com/f260b6.jpg https://u.cubeupload.com/QAXcRZ.jpg

(Yes, I'm detail oriented.)

A few reasons I know these tires were not underinflated in the past year is
that I check them periodically when the college kid is in town, and I
inflate to 40psi habitually for all my passenger tires.
<http://www.bild.me/bild.php?file=5538528tire.jpg>

This tire above is the same car, and almost certainly the same brand (as
only the spare was a different model) but the tire that popped did NOT have
any repairs by me so I never touched it other than to inflate it to 40psi.
<http://www.bild.me/bild.php?file=6543956tireoncar.jpg>

The carcass says it can handle a given load (I don't remember the pounds
but she read it to me and it was something like 1400 and change per tire)
at 44psi, where she was at 40psi on a hot day at 80mph (yes, I know that
means the pressure went up about 10% or so).

There is almost zero chance this tire was underinflated for the last year,
but there's no way to know what it was prior to that as the tire is 3 years
old and she bought the car 1 year ago.

> Overinflation also puts undue stress on the sidewall, but not in the same
> way.


I typically recommend everyone I know use 40psi despite the door sticker,
but this door sticker, for the record, is 29psi.

> So she's a person who is prone to running over nails frequently?\


I don't know why most of you don't get as many flats as we do, but I repair
a nail-or-screw-based flat every few months it seems, although caveats
apply where it's not on a general schedule, of course, and I do it for
neighbors and I have 4 cars in use all the time, where it's part of my
equation as to why I mount and statically balance my own tires at home.

Here's a picture of one of the tires I repaired in 2016 for example that I
had posted to this newsgroup when I was looking for a good patch plug
supplier.
https://imgur.com/InL9A8y

Here are five more holed tires that I posted to this newsgroup back in
2017, where I "practiced" on these five, all of which were well beyond the
tread life.
https://u.cubeupload.com/qD9rZv.jpg

Remember, it doesn't rain for 9 or 10 months of the year here so traction
is "better" the slicker the tread, but let's ignore the extreme tread wear
and concentrate on the fact that tires hole all the time when you look at
the size of this screw, which would have punctured a truck tire since it's
so long.
https://u.cubeupload.com/gCNODb.jpg

This is another picture I posted, of that same tire, showing where it was
punctured by that long screw which is common in the flats that I see around
here.
https://u.cubeupload.com/0X8NfQ.jpg

Anyway, you guys seem to have a LOT more luck with nails and screws than I
do, which is why I repair tires all the time, as I don't think I've ever
had a vehicle ever wear a set of tires to the wear bars before getting at
least half the tires punctured.

Your tires also last FOREVER compared to ours, which only last two years,
and maybe three at most, but this is very hilly very windy country where K
turns are normal every day, twice a day to get out of the garage, none of
which is kind to tires.

The main question here is what on earth causes a tire to catastrophically
fail like that? The real question for me is should I order 4 new tires,
given this thread is still fantastic (she lives elsewhere where it isn't
hilly and windy so she gets more than we do by way of wear).
https://u.cubeupload.com/9JuDSK.jpg
  #96  
Old August 7th 18, 02:33 AM posted to alt.home.repair,rec.autos.tech
Arlen Holder
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Posts: 98
Default Clutch bolts and locktite

Picked up one of these for the next time around!
http://www.bild.me/bild.php?file=932...shing_tool.jpg

Lisle 55600 Clutch Pilot Bushing Remover
"This Blind Hole Bushing Remover Uses Hydraulic Pressure to Quickly
Remove Brass and Bronze Pilot Bushings from 1/2" to 4/4" ID. Not for Use on
Steel Bearings."

I wonder why it wouldn't work for steel?
 




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