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How tight is tight ?
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- เผยแพร่เมื่อ 16 ส.ค. 2024
- This is why we do things the right way .. Stop overtightening oil pan drain plugs and oil filters !!
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that was probably my biggest problem when i first started wrenching. i wanted to crank the hell outta it. dad would always tell me 'ya gonna snap that bolt', but he never would actually stop me. let me learn that lesson the hard/right way. only took once to learn it. and to this day i'm thankful for the way my dad taught me to work on cars. good video Kenny
I have known people over the years that won't hesitate to torque a little 1/4- 20 bolt to 50lbs.
Great point about teflon tape. What an interesting looking drain plug, I've never seen that!
Back in 1970s i worked an auto parts store in Detroit. We carried a special ' oil plug rescue kit ' which was kind of like those rubber expanding freeze plug devices, only longer and skinnier.
For totally stripped - out drain plugs.
We sold a LOT of them in that neighborhood.
Honest dude changing the bolt and not the pan! Thanks for all of the knowledge you share Kenny!
That was a great story. Wow! How it didn't destroy everything. I learned a lot about teflon tape.
Many people fail to realize that fasteners subjected to heat cycles will tighten up over time
I have definitely been guilty of over-tightening. Thanks for pointing this out, I will be more mindful in the future.
Drain plugs only need to be snugged a little bit, not even tight. Turn it in until it stops, then using light force smack the wrench with the palm of your hand, once or twice, but no more.
I think the teflon tape might have been an attempt to stop the drip or snug up with a narrowed diameter. One of those "I hope it works" fixes. It didn't work, whatever the idea was. My dad taught me to always remember that I was stronger than the tool I was using. You can break a bolt, screw, shovel handle, whatever, if you don't remember that.
I believe Pine Hollow Auto Diagnostics had a car and the drain plug was overtightened . He put a torque wrench on it . I think it was almost 80 foot pounds ! I recommend recording with the torque wrench. Then you can let the customer know and they can confront the other " shop " . You got lucky on that one . Maybe the guy who did that was a plumber!
And remember. Don't condemn a "cheaper" socket or wrench if you didn't use the correct size to begin with.
That necking down is amazing !!
I was truly amazed !!
I think @billyhead7798 is onto something here. It is possible the teflon tape was used to help seal the threads from the first time the drain plug was reinstalled. But that is unlikely. It is, as BillyHead said, more likely "somebody" (that bastard, he is all the place) overtightened the drip plug, felt the plug "give" when it began to distort/neck, took it out, then wrapped the threads with teflon tape in an effort to prevent any leaks due to his (or her, but not likely -gals are smarter than that) excessive tightening. And I also bet the 2nd time being tightened was not nearly as tightly turned.
Agreed. Thanks for your feedback 🔧
Heres an idea - stick a label on your oil pan specifying the correct torque (and to use a torque wrench)......Bought a used car, when removing the wheels, found they took over 200 ft lbs to remove the wheel nuts on all 4 wheels. Their last mechanic probably used an impact wrench. The correct torque is 100 ft lbs. fortunately no damage. Beware who works on your car...... or loan them a torque wrench.....or put a label your wheels?? As for oil filters only ever seen one OEM filter printed 15 Nm (11 ft lbs). most just say extra 3/4 turn after gasket contact.
I had an oil change place change my oil once. When I went to change the oil, next time I could see the neoprene seal was squashed as flat as a business card and well beyond the diameter of the drain plug. It took a lang breaker bar to loosen it.
My son had old car and oil was seeping from plug. It was torqued to about 100 lbs. Seems it was kind that had rubber insert and the insert was gone.
Probably my worst ' oil department ' over torque I encountered was Chevy small block spin- on oil filter torqued to where the gasket was squished to where the outer housing metal contacted the block.
Ended up taking a hammer and chisel to get it all off.
Some quick oil change places will use an impact on drain plugs
@@wigletron2846 it's an ' impact ' world.
You have no feel for ' tightness ' with an impact wrench.
Great job!
A "back-tap" would have been a safer approach - it starts at the inner best threads.
The Chevy dealer has done that three times to my wife's 19 Blazer. They cranked the living crap! Out of the drain plug and oil filter. I broke two cup style oil filter wrenches trying to get the filter off. The last time I had a 4 ft breaker bar on the drain plug to get it to crack loose and they rounded the head of it off also.
That's soo unnecessary . I hate when people tighten plugs like that
At 252K (been doing since 100K) on my Honda I still had an oil drain plug strip out on me even using a Torque Wrench (hand tighten and then use torque wrench) every time at 29 torque lbs. Sometimes the aluminum threads strip out from all those changes and just wear out. I started to beat myself up over it, but not my fault.
Teflon tape of not, X ft lbs is Xft lbs. If your "feel" is off, you don't just keep tightening unless you are oblivious to the potential damage you will cause.
Teflon tape is ONLY for tapered pipe threads.
Very good.
Learned this the hard way with my dad when I was young. I also learned that day how to use extractors. My dad made me do it lol.
Someone got real lucky the threads on that bolt did strip, otherwise it could have broken off in that pan. Some vehicles you do what you can without replacing the pan, cause some can be a lot of work to replace, cost hundreds in labor just to replace. One thing I've always been conscious of is those drain plugs, one screw up can cost a lot of trouble.
Way back in 1970s I worked an auto parts store in Detroit. We sold a lot of
' emergency stripped-out oil plug'
kits. They looked like a real cheezy way to go, but a lot of people bought them.
NEVER have I put Teflon where it didn't belong. I also hand tighten my drain pan bolts on then give them a snug or two, never gone beyond a quarter of a turn after I hand tightened. Also never had a problem from it either.
One time my dad had to get a new oil pan due to some problem with it and the drain plug. I told him the same place always does work and oil changes on your car, they messed it up and should pay for it. Places always using air tools on drain plugs. It drives me nuts.Socket and hand rachet should be all it takes.
I worked in a heavy truck grage and I was guilty of over tighting I learned.
Crappy shops will use impacts on drain plugs
I teach my sons to torque something like that with a regular box wrench and your hand.
That should do it and keep you from going too far.
Save the breaker bar torque for wheel lugs and suspension bolts.
Setting torque with an impact is like torquing using a hammer.
Interesting discovery. I say, “Leave the Teflon tape for the plumbers”🧐
Hey Kenny!
Ive actually seen loose plugs end up like that, they vibrate so fast they smooth themselves, and the layer of oil helps speed the process
It sounds weird but its a thing lol
I have seen that. Usually, when a plug blows out & takes the threads, it's because it wasn't torqued correctly. Keep wrenching
@@WrenchingWithKenny my Motorhome V10 did exactly that lol
I used to have a bolt like that I kept in my tool box. Fine thread on the end and coarse thread in the middle.
- S T R E T C H -
I know what you mean about the Teflon.
I have oiled wheel lugs forever, couple years ago I tried using aluminum never- seize and found it made it feel like you could turn it till it just snapped.
I took it off , only use regular oils.
Never - seize on lower torque applications only.
Must of used impact on that oil drain bolt?😲😲
Snug is for drain plugs and oil filters,tight is for wheel lug nuts just a simple comparison
On diesel locomotive engines, we used to call necking "perm-def." Stands for permanent deformation. Imagine having to tell your boss you perm-deffed' something on a $750,000 engine. Thanks for sharing!
I have a good friend.that over tightens. Everything he works on.the last thing he over tightened was coil packs on his chevy trailblazer he slapped the coil pack bolt.i don't really understand why but he keeps over tighten things
Was it threding tape to help plug start on threads😮
Are you saying I shouldn't tighten the drain plug with my 1/2" impact wrench anymore? 😂
No, I don't really do that😁
my manufacturer clearly specified 3.5Kgm of torque on the drain plug, period 😉
I've had several cars where I was the only person to ever service them for over 250K miles . At least 50 oil changes or more. I never stripped a drain plug or pan , wore out a drain plug or pan in that time. I don't get how people can overtighten the snot out of drain plugs and filters too
Bob the butcher at it again.Give it up all you Bob's out there
Should start a trophy cabinet. What can go wrong.
Love your video! Do they make a time sert or cal- van insert for this problem?
I've seen people try to heli-coil drain pans and it never seems to work. I've drilled and retapped to the next size up and haven't had issues .
I haven’t had any issues using heli coils, as long as you don’t overtighten it again heli coil works fine just can’t overtorque those
In your experience is it common for a stripped plug to not leak whatsoever? Like the new repairman blames a stripped plug on the previous shop even though there's never been a problem and has never leaked until his crew worked on it? Seems a stripped plug would've shown some sign of leakage.
I used a box wrench
Says they are trained to
This would be funny if it wasn't at the customers expense. Unbelievable
Wally's use a air wrench
I hate using t tape
Do you use a torque wrench on an oil drain bolt? Is this bolt the same torque on all cars/trucks?
Yes, I use a torque wrench for safety. Experienced mechanics will know the torque by feel. No, it is not the same torque on all cars/trucks? That is a major oversimplification of the complexity and importance of proper torque specs and procedures on especially bolts that have high torque values (say 110 foot pounds) where they should be tightened down in the correct sequence and in a step-wise, tiered fashion. CHECK your service manual or a service manual on line for the correct torque sequences and values (depending on the component).
15 foot pounds would be a good starting point for most drain plugs. That is roughly a Toyota torque.
Is there a great free web site for all bolt torque specs if you can't afford Mitchell or Alldata?
Google
Amsoil has oil capacities and plug torque all for free on their website
it wouldn't be because of teflon tape but because the bolt is prob a knock off from china and not strong
Did you ever see this before. Repeat