What would you do please?
Discussion
I was helping my friend to change the transmission fluid and filter yesterday. When my friend was reinstalling the 14 pan bolts he snapped the final one. We noticed that the torque wrench was set incorrectly. We will remove the broken stud with a reverse drill bit and replace with a new bolt.
My my question is, do we need to “un-tighten” the remaining 13 bolts? The gasket is a squishy rubber part about 10mm deep. Each of the 14 bolt holes have a 5mm anticrush washer (I guess to stop people like us over tightening the bolts and distorting the gasket.
The pan pan is not leaking so would you bother to loosen the other 13 bolts or leave them be?
many thanks
My my question is, do we need to “un-tighten” the remaining 13 bolts? The gasket is a squishy rubber part about 10mm deep. Each of the 14 bolt holes have a 5mm anticrush washer (I guess to stop people like us over tightening the bolts and distorting the gasket.
The pan pan is not leaking so would you bother to loosen the other 13 bolts or leave them be?
many thanks
If it really bothers you drop the sump & refit with a new gasket with all properly torqued.
If it doesn't just replace the broken one at the proper torque & leave the rest alone.
I'm assuming it's the type with a metal tubes at the bolt holes so Guy the Gorilla can't overtighten them by swinging on the wrench
If it doesn't just replace the broken one at the proper torque & leave the rest alone.
I'm assuming it's the type with a metal tubes at the bolt holes so Guy the Gorilla can't overtighten them by swinging on the wrench
Edited by paintman on Thursday 18th March 18:29
Paul_M3 said:
What was the torque wrench supposed to be set to, and what was it actually set to?
They are supposed to be torqued to 4.5 ft/lbs. The torque wrench never clicked but the bolts seemed to be quite tight (and the last one snapped).I don't want to have to go through the whole drain/refill/buy new gasket if I can help it. I will replace the broken one, but will the other bolts being over-tightened cause damage down the line?
belfry said:
Paul_M3 said:
What was the torque wrench supposed to be set to, and what was it actually set to?
They are supposed to be torqued to 4.5 ft/lbs. The torque wrench never clicked but the bolts seemed to be quite tight (and the last one snapped).I don't want to have to go through the whole drain/refill/buy new gasket if I can help it. I will replace the broken one, but will the other bolts being over-tightened cause damage down the line?
That REALLY should have been done straight away.
4.5ft/lb can be done with a 1/4 drive ratchet & is really very low, if you have sheared a bolt you are clearly going to be way over the elastic limit of the bolts.
I would be changing the lot, it is definitely not worth the risk of losing containment of the sump at speed on a motorway.
All bolts out, new gasket, new bolts is what I would now be doing - sounds like you've got some quite tight bolts in there now, Im guessing it was a 3/8 or 1/2 torque wrench so you'll have got some good torque on them
Tho tbh for 4.5 ft lbs I wouldn't have bothered getting out the torque wrench
Tho tbh for 4.5 ft lbs I wouldn't have bothered getting out the torque wrench
E-bmw said:
belfry said:
Paul_M3 said:
What was the torque wrench supposed to be set to, and what was it actually set to?
They are supposed to be torqued to 4.5 ft/lbs. The torque wrench never clicked but the bolts seemed to be quite tight (and the last one snapped).I don't want to have to go through the whole drain/refill/buy new gasket if I can help it. I will replace the broken one, but will the other bolts being over-tightened cause damage down the line?
That REALLY should have been done straight away.
4.5ft/lb can be done with a 1/4 drive ratchet & is really very low, if you have sheared a bolt you are clearly going to be way over the elastic limit of the bolts.
I would be changing the lot, it is definitely not worth the risk of losing containment of the sump at speed on a motorway.
It's highly likely that nothing will happen, but the consequence if they do fail could potentially be significant. I wouldn't be risking it.
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