Stripped subframe bolt hole
#1
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Stripped subframe bolt hole
Previous owner somehow stripped the oem subframe bolt hole. He then enlarged the hole to install a larger standard size bolt which hasn't seem to work because the bolt seems very loose and not done right. My question to the community is whether you guys think a Helicoil would be better for the job so I can install a OEM size matching subframe bolt or just use a Tap & Die kit to tap the hole and install a larger bolt correctly. Please help, thank you!
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Yes definitely irks me especially because the repair wasn't done right. What's more is that the previous owner was a mechanic with access to a huge shop where I bought the car.
#6
RX-7 Bad Ass
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Those holes are really important as I'm sure you know. Is this for the front or rear subframe?
If you could get to the other side in theory a new captive nut could be welded on, but that may be just a ridiculously big job. I would probably try the Helicoil first. Doing so I would REALLY take my time, make sure it's in there dead straight, and is installed perfectly as per the directions.
Dale
If you could get to the other side in theory a new captive nut could be welded on, but that may be just a ridiculously big job. I would probably try the Helicoil first. Doing so I would REALLY take my time, make sure it's in there dead straight, and is installed perfectly as per the directions.
Dale
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Would you guys by any chance know the size of the front subframe bolt? Or perhaps where I could find out the size? I don't want to have to pull out the other side but I will if I have to.
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#8
Rotary Freak
The bolt is 12 x 1.25, 50 long.
I've re-tapped a different front rail internal captive nut for a simple bracket, but with the bolt used for the front subframe, going the next size up to 14mm metric fine, gives a larger hex head and the potential to interfere with castor adjustment....which these things need all they can get!
I'd use a time-sert over a helicoil in this application too.
I've re-tapped a different front rail internal captive nut for a simple bracket, but with the bolt used for the front subframe, going the next size up to 14mm metric fine, gives a larger hex head and the potential to interfere with castor adjustment....which these things need all they can get!
I'd use a time-sert over a helicoil in this application too.
#12
It Just Feels Right
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You may want to look into timeserts. They are more rigid/permanent than helicoils
++ TIME-SERT Official Threaded inserts for stripped threads, blown out sparkplugs,
++ TIME-SERT Official Threaded inserts for stripped threads, blown out sparkplugs,
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I really wanted to use a Timesert insert however the largest length they carry for that size bolt is a M12X1.25X30MM. I need a M12X1.25X50MM.
Last edited by simronrx7; 04-19-17 at 05:47 PM. Reason: Spelling error
#17
It Just Feels Right
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So just took a looksy (it's been a while since I've been under there). There are studs that hold the subframe.
Are you saying that not only did someone remove the studs they managed to strip the carrier bolts
Don't know how that could happen, but anyways, the carrier bolt appears to be 10-15mm. You can see it through an access hole that's plugged
If was me, I would tap a timesert with the same inner threads as the stock studs, and then reattach the stock studs.
Are you saying that not only did someone remove the studs they managed to strip the carrier bolts
Don't know how that could happen, but anyways, the carrier bolt appears to be 10-15mm. You can see it through an access hole that's plugged
If was me, I would tap a timesert with the same inner threads as the stock studs, and then reattach the stock studs.
#18
Rotary Freak
The rear fastener, near the lower arm rear pick-up on the subframe, is a bolt. The other 2 studs are up front along with the aligning pin.
Don't know what a typical JIS nut size is in metric fine, but ISO is 10.8mm high...so something around that size should do, there seems to be something going on here to make things overly complicated imho.
Don't know what a typical JIS nut size is in metric fine, but ISO is 10.8mm high...so something around that size should do, there seems to be something going on here to make things overly complicated imho.