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Loud tappet like noises from Engine....

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Gazc
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Loud tappet like noises from Engine....

Post by Gazc » Wed Nov 22, 2017 11:27 pm

Z4M-2006 wrote: Wed Nov 22, 2017 7:12 pm I dare say thats more to do with 320d v 330d to be honest...

The 4 cylinder diesel is pretty crap.

Not BMW but we did an Audi last week,car was a 2008,full Audi Service history.... Pollen filter date,2009...
Got to agree with this my indi said he has changed so many 2.0D engines that he can change them in under 2 hours now.
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Loud tappet like noises from Engine....

Post by Ducklakeview » Thu Nov 23, 2017 12:43 am

Gazc wrote: Wed Nov 22, 2017 11:27 pm
Z4M-2006 wrote: Wed Nov 22, 2017 7:12 pm I dare say thats more to do with 320d v 330d to be honest...

The 4 cylinder diesel is pretty crap.

Not BMW but we did an Audi last week,car was a 2008,full Audi Service history.... Pollen filter date,2009...
Got to agree with this my indi said he has changed so many 2.0D engines that he can change them in under 2 hours now.
Sheesh, that's some going!

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Loud tappet like noises from Engine....

Post by jimmybell » Thu Nov 23, 2017 4:08 pm

So many pages on this - did the guy ever get it fixed? :D
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Loud tappet like noises from Engine....

Post by ph001 » Thu Nov 23, 2017 5:09 pm

jimmybell wrote: Thu Nov 23, 2017 4:08 pm So many pages on this - did the guy ever get it fixed? :D
You only need to go back one page to find the answer! In a word, yes.
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Loud tappet like noises from Engine....

Post by r0bb0 » Mon Nov 27, 2017 11:42 pm

A lot of the follower failures seem to happen not long after an inspection 2 from what I have read, does anybody know what's the causes the the follower to wear away ,poor hardening, incorrect adjustment, lack of inspection to see how badly they are worn before shimming. There must be a maximum shim that can be fitted shortly before failure. Why only a couple seem to wear badly. If it was a bad batch of material then surely all of them would wear out equally. Thoughts?

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Post by MrPT » Tue Nov 28, 2017 12:37 am

r0bb0 wrote: Mon Nov 27, 2017 11:42 pm Why only a couple seem to wear badly. If it was a bad batch of material then surely all of them would wear out equally. Thoughts?
Maybe because the follower deteriorates so quickly once the case hardening has gone, that you’d need all follower coatings to fail at *exactly* the same time to see equal wear.

But you do hear of only one follower failing sometimes. I don’t know whether this means that just one follower started tapping or only the coating on one follower failed (or both). That would be inconsistent with bad batches, assuming that engines are fitted with followers with contiguous production dates.
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Loud tappet like noises from Engine....

Post by Ewazix » Tue Nov 28, 2017 7:01 am

MrPT wrote: Tue Nov 28, 2017 12:37 am
r0bb0 wrote: Mon Nov 27, 2017 11:42 pm Why only a couple seem to wear badly. If it was a bad batch of material then surely all of them would wear out equally. Thoughts?
Maybe because the follower deteriorates so quickly once the case hardening has gone, that you’d need all follower coatings to fail at *exactly* the same time to see equal wear.

But you do hear of only one follower failing sometimes. I don’t know whether this means that just one follower started tapping or only the coating on one follower failed (or both). That would be inconsistent with bad batches, assuming that engines are fitted with followers with contiguous production dates.
Generally bearings on a rotating shaft, or wear points like followers all wear at different rates due to oil flow, temperature and loads due to the shaft 'flexing' at high rotation speeds. I also think you are spot-on with the point about accelerated wear once the hardened surface is breached, once a wear point develops it will always catch. My guess is that as with crank bearings the same followers probably wear first on average engines. "The all do that sir, it's a wear-and-tear characteristic nothing we can do" ..... as the BMW warranty agent would say :wink:
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Loud tappet like noises from Engine....

Post by BMWZ4MC » Tue Nov 28, 2017 8:23 am

As above. The case hardening on the followers is very thin, once it’s gone, the follower fairly quickly trashes the cam lobe with which it’s paired.
Schrick sell coated OEM followers that should lessen the wear rate.
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Loud tappet like noises from Engine....

Post by T1berious » Tue Nov 28, 2017 2:01 pm

In other news, she's going back this weekend for some exhaust heat shield welding action, wheel refurbs and dyno run.

In totally unrelated news, our long serving E92 330i is being replaced by a 440i on Thursday. 158k and a decade later she's being replaced.

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Loud tappet like noises from Engine....

Post by Mangozac » Tue Nov 28, 2017 9:24 pm

T1berious wrote: Tue Nov 28, 2017 2:01 pm In other news, she's going back this weekend for some exhaust heat shield welding action, wheel refurbs and dyno run.
The new bearings are supposed to have a run-in period of 1k miles or so - not sure I'd want to be putting it on a dyno that soon :?
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Post by BMWZ4MC » Wed Nov 29, 2017 12:42 am

My cat heat shield rattles like a pig. I had it welded a few years ago but grounding on an aggressive change in camber at a drive entrance put pay to that. The good news is that welding it cures the problem, the bad news is you’ll dislodge it again at some point!
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Loud tappet like noises from Engine....

Post by TomK » Wed Nov 29, 2017 1:43 am

Mangozac wrote: Tue Nov 28, 2017 9:24 pm The new bearings are supposed to have a run-in period of 1k miles or so - not sure I'd want to be putting it on a dyno that soon :?
According to BMW's workshop manual that's not true (and also what I've been told by my shop), no run in period is required for these on replacement. I think most just take it relatively easy for a few hundred miles to be on the safe side, 1k is unnecessary.
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Loud tappet like noises from Engine....

Post by Mangozac » Wed Nov 29, 2017 4:40 am

TomK wrote: Wed Nov 29, 2017 1:43 am According to BMW's workshop manual that's not true (and also what I've been told by my shop), no run in period is required for these on replacement. I think most just take it relatively easy for a few hundred miles to be on the safe side, 1k is unnecessary.
By BMW's workshop manual you're referring to TIS/ISTA? I couldn't find any reference to it and unless it specifically says that a run-in period isn't required I wouldn't take it to mean that it isn't.

I know the arguments which say that the break-in is unnecessary, but it is recommended by BMW: under SIB 11 04 04 (rod bearing updates for early E46 M3s) it specifically states that a 1200 mile break-in period is required following the correction work. I have two friends who are experienced BMW techs, both E46 M3 owners and they agree that a break-in should be performed.

That said, I do agree that 1200 miles of break-in is certainly overkill but dyno runs are not a casual engine operation so I definitely wouldn't be doing one too soon after the bearing change!
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Loud tappet like noises from Engine....

Post by Beedub » Wed Nov 29, 2017 8:35 am

Definitely run these parts in for a period, its will hurt nothing to do so and give you piece of mind.
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Loud tappet like noises from Engine....

Post by Smartbear » Wed Nov 29, 2017 8:58 am

^^As above ^^ if it was my car I wouldn’t let it go near a Dyno at this early stage.
I certainly wouldn’t want to be changing the bearing shells twice :oops:
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