Daft question but...

I found a loose bottom engine mounting bolt today that appears to have been the cause of a strange rattle so have tightened it back up but am now wondering how many of these and which ones are undone to change the cambelt on a BMM 2.0 PD TDI. I had the belt changed the other week and think the bolt may have been one of the ones loosened so want to check the others when I get the chance...

Thanks...

What year is your car?

I've changed the cambelt on my early '06 2.0 tdi pd (BKD), and the whole engine mount on the cambelt side has to come out....so the 3 bolts attaching it to the engine and 2 bolts attaching the mount to the body have to come out.

But I think they significantly changed the engine mount design in mid/late 2006 so that it is not necessary to take it out to replace the cambelt. Having said that, I can't imagine access being improved with the new mount, so it may still be easier to do the job with the mount removed.

If they did remove the mount (sounds likely....bit too much of a coincidence to have a loose bolt) they should have replaced all the bolts on the mount with brand new ones.

When i had mine done the dealer told me they are one time use only as they are stretch bolts so would need another 2 new ones.I got them to replace them obviously.Cost an extra £10 if i remember.

Car is a 2007 4x4 and the bolt that was loose was threaded all the way down so wasn't a stretch bolt. I thought the cambelt kits came with new bolts anyway?

I'll probably check with the garage tomorrow but I'd also like to check them myself...

I thought the cambelt kits came with new bolts anyway?

On the BKD they come with a new bolt for the tensioner and new threaded studs/nuts for the 2 rollers that are replaced......but no engine mount bolts. Isn't the BMM engine the 8v 2.0 pd tdi? If so then much of what i said above may not apply as i've only worked on the 16v version.

All the engine mount bolts MUST be replaced as they are angle tightened. Cambelt kits don't usually come with engine mount bolts.

Ok cheers guys I'll double check with the guy that did it and yes the BMM is an 8v 2.0 PD TDI with DPF in a 4x4.

I'm off on holiday in it tomorrow so am going to struggle to get it in to get them replaced... so I reckon I've got no choice but to just keep a regular eye on them.

I wouldn't worry about it too much.....just tighten the loose bolt up and it'll probably be ok. It may be the garage just forgot to tighten it up fully.

There have been quite a few debates on various VAG forums about weather or not it is really necessary to replace the the bolts when you remove them. Some say its ok to re-use them (seemingly some dealers), others (Including the manufacturers) adamantly insist they should be replaced.

I wouldn't worry about it too much.....just tighten the loose bolt up and it'll probably be ok. It may be the garage just forgot to tighten it up fully.

There have been quite a few debates on various VAG forums about weather or not it is really necessary to replace the the bolts when you remove them. Some say its ok to re-use them (seemingly some dealers), others (Including the manufacturers) adamantly insist they should be replaced.

It's not OK to re-use then. They are self-locking for a reason!

I've seen the non-replacement of engine mount bolts lead to short engine replacement. As the bolts worked loose they snapped off part of the block.

I wouldn't worry about it too much.....just tighten the loose bolt up and it'll probably be ok. It may be the garage just forgot to tighten it up fully.

Having seen the mess a snapping bolt made on a work colleagues car, I'd suggest changing the bolts for new ones and getting it correctly torqued.

Is a £2 bolt worth it, over the risk of dropping the engine on the motorway?

Edited 6 August, 201213 yr by cheezemonkhai

True I remember djgritt,s thread on here a few years ago when this happened and his engine dropped out on the floor. Completely recked it.

Having seen the mess a snapping bolt made on a work colleagues car, I'd suggest changing the bolts for new ones and getting it correctly torqued.

We don't know that the garage didn't use new bolts.....they may have and just didn't tighten one bolt up.

It's not OK to re-use then. They are self-locking for a reason!

I've seen the non-replacement of engine mount bolts lead to short engine replacement. As the bolts worked loose they snapped off part of the block.

I agree that the bolts should be replaced........but unless you specifically tell them, a lot of garages (including main dealers) don't......fact.

My dealer told me that the bolts would be replaced as well.

...I agree that the bolts should be replaced........but unless you specifically tell them, a lot of garages (including main dealers) don't......fact...

Skoda franchised dealers will replace the bolts as part of the cambelt change - you don't need to specifically tell them.

Skoda franchised dealers will replace the bolts as part of the cambelt change - you don't need to specifically tell them.

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Actually to be fair, I took the car to a VW main dealer and ended up going ape **** at the guys after they didn't do them, then said they don't need doing.

They even argued with the maintainance guide they had that identified the bolt as single use.

So you still have to check and make sure, no matter where you are.

Ok thanks guys - I called the garage last night and they were most apologetic thatit had come undone. Apparently they are aware of this being an issue with VW Group cars ih the past so generally thread lock them in but obviously something went wrong with the procedure in this instance.

Unfortunately I don't have time to get new ones fitted today (off on holiday in an hour or so) but will keep an eye on it whilst away and will get it all checked over when I get back (at this moment in tie I don;t have a choice and it did got to Warwick and back with it undone over the weekend which gives me some reassurnace).

Interestingly, I'm pretty certain the bolt in question was not a stretch bolts from what I felt and saw but I can't remember if they looked new... Having checked on-line and with the garage that bolt is a pretty low torqued one so it may be it was never tightened up. It certainly went back in easy so the engine hadn't moved at all, the mount all appears intact etc. and the other bolts are all tight.

Regarding replacement from what I can tell, having had the bolt all the way undone, there is also no way that it could be replaced with the engine in-situ as it is too long to be removed and fouls the bodywork...