[bkc]

Hi all,
My Diwali is doomed this year, two undesired incidents happened and spoiled the party.

First incident:

https://www.team-bhp.com/forum/india...-what-now.html

Second incident:

After visiting site for the footage, and while returning home, My swift had a thud noise in the engine bay. I applied brakes and suddenly stopped the car carefully.

I put off the engine, stepped out and opened the engine bay. To my dismay, the entire engine appeared to be tilted towards battery/coolant tank/air filter side.



As our apartment was few hundred meters ahead on the same road, Quickly, I called up my brother, asked him to come to the spot.

We both managed to push the car to roadside and made a few calls to Mandovi SA and manager Santosh. SA was on leave and not reachable due to festival, but, the manager was prompt and sent the MOS van to the car's location.


Mean while, I explained the situation to the manager and was assessing the damage. The coolant leakage had started from 10-15 meters, where the thud was heard. I could see one lower mount tilted and suspected mount damage almost immediately.


I thought, some bolt has been left unfastened during service and has given away now. The car had run nearly a thousand kms since the last major service. Items replaced during that service were lower arm, rear suspensions, front strut rubber parts, front stabilizer bar parts, steering assembly and some small frontal suspension parts. The car had its 1lac kms service that day @ 100730kms , along with these replacements.
Now the bolt failed @101657kms.


From the first inspection, I could infer the below things:
1) Engine tilted, only one way, mounts might be broken.
2) Inspected the found one lower mount tilted.
3) On another side, I could see the engine un-mounted from battery side. On closer inspection, I couldn't make out if it is broken or self removed bolt.

4) I could see a broken threaded part and confirmed something is indeed broken.

5) Coolant dripping and was obvious of some hose to cut after engine changing position from intended location.

Since I'm into construction, I'd keep some hand tools for alteration buildings, using those, I removed the battery and straightaway found the broken part of the bolt and conveyed the same to Manager.


This helped him to send MOS van with the bolt and other required things.
He conveyed that the MOS would reach in 45 mins. MOS called and I asked, if I could get a hydraulic jack to lift the engine and fix the bolt. They were affirmative. They arrived with the bolt and removed the broken bolt from threading with a cutting plier.


Later, they used the jack to lift the engine till the mounts location and slide the bolt inside with the help of screwdriver for positioning. The bolt fit in perfectly without issues. The battery was fit back, to release the steering lock and car was prepared for towing with the tow hook. The leaking coolant was assessed to be a broken thermostat. They even observed that the drive shaft has slid out from its position.
I asked them to start the job once My SA and Manager are available, they'd come on Tuesday and update me with the status.

Will the critical component like bolt fail so easily??

[TheHelix0202]

I'm glad you're safe first. Refer to these links please - https://www.google.com/amp/s/www.aut...-engine-mount/

https://www.samarins.com/glossary/engine-mount.html

[saket77]

Bad times for you was my feeling when I saw the thread and your name under it. Hopefully it ends with this.
Coming to the issue, why do you suspect that it was opened/ unfastened during service? Under normal circumstances, I don’t think the ASC would touch the mounting if there isn’t any issue. Any specific work done related to or needing to unfasten the mounting bolt?
If not, I’ll be very surprised why this metal fatigue actually happened. I’m sure MASS would also check other mounting points. It could be that some other mounting points or the engine mount itself might have failed putting this bolt under so much stress that it gave up.

Please update about the diagnosis. And what about the CCTV footage of the other incident?
Hoping it’s the end of troubles for now.

Regards.

[bkc]

Originally Posted by saket77

Any specific work done related to or needing to unfasten the mounting bolt?
If not, I’ll be very surprised why this metal fatigue actually happened. I’m sure MASS would also check other mounting points. It could be that some other mounting points or the engine mount itself might have failed putting this bolt under so much stress that it gave up.

Please update about the diagnosis. And what about the CCTV footage of the other incident?
Hoping it’s the end of troubles for now.

Regards.

Bad fortune cookie
Last service involved replacement of steering assembly, tie rod ends, suspension works and stuff. Gearbox mount may be removed but it was fastened properly.
No mistake from their side . But, bolt failing is making me uncomfortable. Bolts should usually last the lifetime.

I didn't hear back for my footage request. Asked my mason to go and remind them again. I'll keep it posted.

[Nithesh_M]

Maybe your neighbor wants a donor car for his damages?

Bolt failures can happen randomly due to various reasons. Your bigger worry should be damage to other components.

[Jeroen]

This is very unusual. Yes engine mounts do wear out. But it tends to be rubber.

This bolt looks completely sheared off? And it is not as if this is a small bolt either! Were any other parts of the engine mount damaged and or repaired.

The bolt does not look corroded, just sheared off. Really, only over-tightening or a manufacturing defect can cause that I would think.

These bolts need to be carefully tightened with a proper torque wrench. Has any work ever been done on the engine mounts?


Jeroen

[bkc]

Originally Posted by Nithesh_M

Maybe your neighbor wants a donor car for his damages?

Bolt failures can happen randomly .

This is critical bolt, imagine the rear center shaft of a scooter giving away randomly, it is also a kind of bolt. Yes donor car

Originally Posted by Jeroen

This is very unusual. Yes engine mounts do wear out. But it tends to be rubber.

This bolt looks completely sheared off? And it is not as if this is a small bolt either! Were any other parts of the engine mount damaged and or repaired.

The bolt does not look corroded, just sheared off. Really, only over-tightening or a manufacturing defect can cause that I would think.

These bolts need to be carefully tightened with a proper torque wrench. Has any work ever been done on the engine mounts?


Jeroen

Yes, bolt is not corroded and this part sits over the gearbox, it could have been opened in many occasions like clutch replacement. Now thinking of other damages caused by the bolt.

[RadixLecti]

Originally Posted by bkc

This is critical bolt, imagine the rear center shaft of a scooter giving away randomly, it is also a kind of bolt. Yes donor car


Yes, bolt is not corroded and this part sits over the gearbox, it could have been opened in many occasions like clutch replacement. Now thinking of other damages caused by the bolt.

I've seen a few bolts break in my line of work, and as Jeroen says this tends to only happen from overtightening (or extremely unequal tightening) or from being unlucky enough to have the one defective bolt from a batch of thousands.

I don't know how many mounting bolts there are on your car's engine, but you may want to consider having all of them checked for the correct tightening torque.

[Nithesh_M]

Knowing Maruti Suzuki it is more likely to be part failure from a defective batch of bolts.