Torqing a re tapped screw.. - Toyota Yaris Forums

yaris1F8 · 08-12-2013, 08:08 PM

I had to re tap a screw around my cowl cover it was all rusted and the head just fell off.. so i had to drill and re tap.. Put in a new screw, mind you its not on the engine thank god.. But i noticed that when I torqued it, its like it wasnt torqing.. maybe im a little scared to tighten it.. I put some tapping oil in there too. ;)

esse10 · 08-13-2013, 11:05 AM

the lube (tapping oil) makes it torque at different value or over tightened. I would think that anything that's not on the engine and is small hardware should just be skill of the craft hand tight kinda way, but to each his own.

ilikerice · 08-13-2013, 11:55 AM

Are you talking about the #10 bolts that hold down the cowl where the wiper motor and regulator go?

It depends how you drilled out the screw to begin with. If you used a reverse drill bit and was able to pull the bolt out with threads still there. Retaping just to clean out the threads, then I think it should be fine.

But if you drilled out the bolt thru using a small drill bit. trying to get the remaining threads out is a pain. Its possible that you may have destroyed some of the remaining threads and possible if you are using the same size tap that you may crossthreaded it and just made it weakier.

I would try to drill out the hold a little bit bigger and retap and use a #12 head. I don't know the Diameter of the tap but it should be a 1.25 thread type.

That's what I would do..

cali yaris · 08-13-2013, 12:06 PM

derrick, this:

Quote:

it was all rusted and the head just fell off.. so i had to drill and re tap..

yaris1F8 · 08-13-2013, 12:39 PM

Its the screw closest to the top plate.. The cowl cover was making a poping noise and i thought it was something underneath.. got the car checked out a couple of times by different mechanics, found nothing wrong.. Finally i found out it was the cowl cover.. i saw it loose, and so i tightened the screw using a 10 mm short wrench.. i applied very little torque just with one finger and the screw just snapped. Ohhh so i said 'HO NO'... well i dismantled everything and got to work.. I drilled and retapped, i had no choice cuz the screw just didn't want to come out.. I retapped and put back in there a 10mm, a screw i had on my motorcycle.. Its all good.. and everything is solid now.. but you would think the car has very low millage at 27000 kms.. screws shouldn't be breaking off. If ever it gets loose again (I doubt it).. ill make the hole bigger and put in a 12mm.. I already have the screw. :)

08-13-2013, 11:05 AM	#2
esse10 Drives: 2009 yaris 2 door Join Date: Feb 2013 Location: richmond TX. Posts: 232	torque the lube (tapping oil) makes it torque at different value or over tightened. I would think that anything that's not on the engine and is small hardware should just be skill of the craft hand tight kinda way, but to each his own.

08-13-2013, 11:55 AM	#3
ilikerice Drives: 2010 black yaris Join Date: Oct 2010 Location: savannah, ga Posts: 2,868	Are you talking about the #10 bolts that hold down the cowl where the wiper motor and regulator go? It depends how you drilled out the screw to begin with. If you used a reverse drill bit and was able to pull the bolt out with threads still there. Retaping just to clean out the threads, then I think it should be fine. But if you drilled out the bolt thru using a small drill bit. trying to get the remaining threads out is a pain. Its possible that you may have destroyed some of the remaining threads and possible if you are using the same size tap that you may crossthreaded it and just made it weakier. I would try to drill out the hold a little bit bigger and retap and use a #12 head. I don't know the Diameter of the tap but it should be a 1.25 thread type. That's what I would do.. __________________ -Derrick- "Racing is important to men who do it well. When you're racing... It's life. Anything that happens before or after, is just waiting."

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08-12-2013, 08:08 PM	#1
yaris1F8 Drives: Yaris 1F8 Join Date: May 2013 Location: Canada Posts: 80	Torqing a re tapped screw.. I had to re tap a screw around my cowl cover it was all rusted and the head just fell off.. so i had to drill and re tap.. Put in a new screw, mind you its not on the engine thank god.. But i noticed that when I torqued it, its like it wasnt torqing.. maybe im a little scared to tighten it.. I put some tapping oil in there too. ;)

08-13-2013, 12:39 PM	#5
yaris1F8 Drives: Yaris 1F8 Join Date: May 2013 Location: Canada Posts: 80	Its the screw closest to the top plate.. The cowl cover was making a poping noise and i thought it was something underneath.. got the car checked out a couple of times by different mechanics, found nothing wrong.. Finally i found out it was the cowl cover.. i saw it loose, and so i tightened the screw using a 10 mm short wrench.. i applied very little torque just with one finger and the screw just snapped. Ohhh so i said 'HO NO'... well i dismantled everything and got to work.. I drilled and retapped, i had no choice cuz the screw just didn't want to come out.. I retapped and put back in there a 10mm, a screw i had on my motorcycle.. Its all good.. and everything is solid now.. but you would think the car has very low millage at 27000 kms.. screws shouldn't be breaking off. If ever it gets loose again (I doubt it).. ill make the hole bigger and put in a 12mm.. I already have the screw. :)