 | |
I changed the Camry's ATF today (added Mobil 1 Synthetic ATF)
Toyota Camry Discussions About Toyota Camry (alt.autos.toyota.camry)
 |
| | Thread Tools | Display Modes |
#11
 
| |||
| |||
|
Re: I changed the Camry's ATF today (added Mobil 1 Synthetic ATF) -
07-03-2009
, 01:23 PM
|
"dsi1" <dsi1 (AT) spamnet (DOT) com> wrote in message news:heh3m.2291$dd4.957 (AT) newsfe10 (DOT) iad... Ray O wrote: With the Allen wrench mounted in a 1/2 inch drive, you can't really measure how tight the bolt is but you can check to see if it is tightened to at least 36 foot pounds. To torque the bolt properly in the first place, it has to be removed. Why would you not be able to measure the torque of an allen wrench socket? Why even use a torque wrench? My statement was worded poorly. Regardless of the type of drive system a fastener has, whether it has an Allen type head square drive, or hex head, you can't measure how tight the fastener is, but you can measure how much torque is takes to tighten the fastener some more. In the OP's situation, I assumed that the OP has started the engine and the fastener has undergone at lease one heat-up and cool-down cycle, so the torque needed to move the fastener is not really an indication of how much it was tightened although he could tell if it was tightened to at least 36 foot pounds if a torque wrench set to that figure doesn't move the fastener. All that said, I would not bother to use a torque wrench in that situation and just install the plug, but if someone did not have a good feel for how tight to fasten a drain plug, then a torque wrench might be a good idea. |
#12
| |||
| |||
|
|
Today I did a drain and refill of my transmission pan's Toyota T-IV, replacing it with Mobil 1 Synthetic ATF. *3.7 quarts of red T-IV drained out and I replaced it with 4 quarts of red M1 Synthetic. *The extra 1/4 of a quart or 0.30 quarts isn't too much extra, is it? * Not enough to cause foaming or windage, right? *(Not even sure windage is an issue in automatic transmissions like windage can be with motor oil inside an engine.) Anyway, the car really likes the M1 ATF so far. *True only about 50 percent of the car's total ATF capacity is M1. *The other 50 percent is the factory fill of T-IV (now 25,000 miles old and 3.5 years). * Maybe it's my imagination, but the car seemed like it was shifting a lot better today with the M1 synthetic in it. *Or maybe it's just a result of having some fresh sauce in the car. I took a sample of the drained T-IV ATF and will mail it to Blackstone Labs tomorrow, just for fun. *I don't expect to see any problems. The only thing I didn't much care for during the ATF change was the surprise of finding an Allen wrench socket on the transmission pan's drain plug. *It's not a regular bolt, so I wasn't able to use my trusty Craftsman torque wrench to torque the drain plug to 36 foot-pounds. * This is an '06 Camry, and unfortunately the Camry service and repair manual I downloaded from CamryStuff.com is for an older 2002 (same 5th generation Camry but the '06 and '05 models are considered Generation 5.5 --they differ slightly from the 2002 to 2004 cars). * So after reading the CamryStuff .pdf document, I was expecting to torque a regular drain plug bolt to 36 foot-pounds, but obviously I couldn't with the Allen wrench (ie, hex? wrench) drain plug. *Is there some way to properly torque an Allen wrench bolt? *Does it take a special adapter fitted to your torque wrench? I'm concerned I came close to stripping the threads by overtightening with an unmeasured Allen wrench. *If I did come dangerously close to stripping the threads, might the pan start leaking sometime in the next few days? Or weeks? Or even months? *So far no leaking. *Well, I noticed I did have some leaking after the first Allen wrench tightening, so I tightened further, and further again. *I think I should have waited for the complete ATF fluid dripping to stop before doing any tightening. * The dripping may have lead to my problem of possibly overtightening and coming very close to stripping the threads. *I waited for only one drip every 3 seconds, but even that, I think, was too soon to begin tightening.. Anyway, is there some way to check the torque of an Allen wrench drain plug bolt, or to torque an Allen wrench bolt properly in the first place? |
#13
| |||
| |||
|
|
For those rare occassions that I need a hex type socket; I cut about an inch off the long side of the allen wrench & then use the proper size socket to loosen or tighten. I use one setup like that for my GM brake calipers & another for my Camry tranny. |
#14
| |||
| |||
|
|
Why would you not be able to measure the torque of an allen wrench socket? Why even use a torque wrench? |
#15
| |||
| |||
|
|
Today I did a drain and refill of my transmission pan's Toyota T-IV, replacing it with Mobil 1 Synthetic ATF. 3.7 quarts of red T-IV drained out and I replaced it with 4 quarts of red M1 Synthetic. The extra 1/4 of a quart or 0.30 quarts isn't too much extra, is it? Not enough to cause foaming or windage, right? (Not even sure windage is an issue in automatic transmissions like windage can be with motor oil inside an engine.) Anyway, the car really likes the M1 ATF so far. True only about 50 percent of the car's total ATF capacity is M1. The other 50 percent is the factory fill of T-IV (now 25,000 miles old and 3.5 years). Maybe it's my imagination, but the car seemed like it was shifting a lot better today with the M1 synthetic in it. Or maybe it's just a result of having some fresh sauce in the car. I took a sample of the drained T-IV ATF and will mail it to Blackstone Labs tomorrow, just for fun. I don't expect to see any problems. The only thing I didn't much care for during the ATF change was the surprise of finding an Allen wrench socket on the transmission pan's drain plug. It's not a regular bolt, so I wasn't able to use my trusty Craftsman torque wrench to torque the drain plug to 36 foot-pounds. This is an '06 Camry, and unfortunately the Camry service and repair manual I downloaded from CamryStuff.com is for an older 2002 (same 5th generation Camry but the '06 and '05 models are considered Generation 5.5 --they differ slightly from the 2002 to 2004 cars). So after reading the CamryStuff .pdf document, I was expecting to torque a regular drain plug bolt to 36 foot-pounds, but obviously I couldn't with the Allen wrench (ie, hex? wrench) drain plug. Is there some way to properly torque an Allen wrench bolt? Does it take a special adapter fitted to your torque wrench? I'm concerned I came close to stripping the threads by overtightening with an unmeasured Allen wrench. If I did come dangerously close to stripping the threads, might the pan start leaking sometime in the next few days? Or weeks? Or even months? So far no leaking. Well, I noticed I did have some leaking after the first Allen wrench tightening, so I tightened further, and further again. I think I should have waited for the complete ATF fluid dripping to stop before doing any tightening. The dripping may have lead to my problem of possibly overtightening and coming very close to stripping the threads. I waited for only one drip every 3 seconds, but even that, I think, was too soon to begin tightening. Anyway, is there some way to check the torque of an Allen wrench drain plug bolt, or to torque an Allen wrench bolt properly in the first place? |
#16
| |||
| |||
|
|
Today I did a drain and refill of my transmission pan's Toyota T-IV, replacing it with Mobil 1 Synthetic ATF. 3.7 quarts of red T-IV drained out and I replaced it with 4 quarts of red M1 Synthetic. The extra 1/4 of a quart or 0.30 quarts isn't too much extra, is it? Not enough to cause foaming or windage, right? (Not even sure windage is an issue in automatic transmissions like windage can be with motor oil inside an engine.) Anyway, the car really likes the M1 ATF so far. True only about 50 percent of the car's total ATF capacity is M1. The other 50 percent is the factory fill of T-IV (now 25,000 miles old and 3.5 years). Maybe it's my imagination, but the car seemed like it was shifting a lot better today with the M1 synthetic in it. Or maybe it's just a result of having some fresh sauce in the car. I took a sample of the drained T-IV ATF and will mail it to Blackstone Labs tomorrow, just for fun. I don't expect to see any problems. The only thing I didn't much care for during the ATF change was the surprise of finding an Allen wrench socket on the transmission pan's drain plug. It's not a regular bolt, so I wasn't able to use my trusty Craftsman torque wrench to torque the drain plug to 36 foot-pounds. This is an '06 Camry, and unfortunately the Camry service and repair manual I downloaded from CamryStuff.com is for an older 2002 (same 5th generation Camry but the '06 and '05 models are considered Generation 5.5 --they differ slightly from the 2002 to 2004 cars). So after reading the CamryStuff .pdf document, I was expecting to torque a regular drain plug bolt to 36 foot-pounds, but obviously I couldn't with the Allen wrench (ie, hex? wrench) drain plug. Is there some way to properly torque an Allen wrench bolt? Does it take a special adapter fitted to your torque wrench? I'm concerned I came close to stripping the threads by overtightening with an unmeasured Allen wrench. If I did come dangerously close to stripping the threads, might the pan start leaking sometime in the next few days? Or weeks? Or even months? So far no leaking. Well, I noticed I did have some leaking after the first Allen wrench tightening, so I tightened further, and further again. I think I should have waited for the complete ATF fluid dripping to stop before doing any tightening. The dripping may have lead to my problem of possibly overtightening and coming very close to stripping the threads. I waited for only one drip every 3 seconds, but even that, I think, was too soon to begin tightening. Anyway, is there some way to check the torque of an Allen wrench drain plug bolt, or to torque an Allen wrench bolt properly in the first place? ========== |
The reason I think I may have partially stripped the threads of the
transmission pan when I tightened the drain plug bolt with an
unmeasured Allen wrench is the ease with which the wrench turned
during my third and final tug on it.
I actually stopped tightening after the first tug, but the
drain plug was leaking 15 minutes later when I checked it. So then
I may have overdone it with a third tug or twist of the Allen wrench.
It seemed like that third and last tightening was a bit too easy
compared to the first two. That's why I think I may have partially
stripped the threads.
No leaking is happening 2 days later, but what course of action
should I take now if, indeed, the threads are partially stripped?
For example, to save the threads, should I completely untighten the
drain plug bolt as soon as possible, and re-tighten? If so, I'll just
commit to doing another drain and fill to bring the Mobil 1 Synthetic
ATF to 75 percent of total fill (right now the fill is a 50/50 mix of
Mobil 1 and T-IV ATF). Or should I just leave well enough alone, and
not untighten the bolt? Will the threads survive for years if they're
partially stripped?
Also, is it possible that the easy turning effect I felt during
the third twist of the Allen wrench may not have
been caused by a partial stripping of the threads, but instead by
a slight compression of the new metal gasket (or crush washer)
that I inserted between the drain plug bolt and the trans pan?
In this case, if it was the metal gasket/crush washer that caused
the easy turning of the wrench during the third final turn, can
I be reasonably safe in thinking that the pan's threads are
not stripped after all? And call it a day? Thanks :-)
#17
| |||
| |||
|
|
« Previous Thread
|
Next Thread »
| Thread Tools | |
| Display Modes | |
Linear Mode
| |
Powered by vBulletin
Copyright ©2000 - 2009, Jelsoft Enterprises Ltd.
Copyright ©2000 - 2009, Jelsoft Enterprises Ltd.