E9x rod bearings question
Discussion
Mr Tidy said:
Different car, different engine but prone to similar issues. I had them replaced on my Z4M at 78K miles and was glad I did when I saw the old ones!
While the front subframe was off I also had new engine mounts fitted although I don't know if they are an issue on E9*s. Mine were as past it as the bearing shells.
The engine mounts are very much an issue on the E9x series. They will be done at the same time While the front subframe was off I also had new engine mounts fitted although I don't know if they are an issue on E9*s. Mine were as past it as the bearing shells.
Being a September 2011 car I believe (although may be wrong) mine would have had the later bearings. I hope to get the car back tomorrow. I believe they started work yesterday but it's also in for a fair bit of other work too. I anticipate a bill a fair bit above £2k.
The indy it's at have done rod bearings a lot. They've averaged 3 sets per week this year alone!
The indy it's at have done rod bearings a lot. They've averaged 3 sets per week this year alone!
JEA1K said:
Its a gamble not to have them done .... £8k - £10 for a new engine inc fitting. My car was at 128,000 and running as sweet as a nut but like everyone, I had 'RB anxiety' and they came out pretty worn ... the car had the same owner for 12 years who used it as his daily driver so I would assume that it was warmed up properly as he must have had a decent commute.
Evolve had a 152k mile one that was on its original bearings.Just because someone owned it for that long and used as a daily driver doesn't mean it was warmed up gently. Even if someone uses it 50 miles a day but thrashes from cold it still will cause significant wear.
SlimJim16v said:
One specialist also uses ARP bolts when doing the bearings.
ACL bearings are sufficient for most. The only benefit of the ARP bolts, really, is of you're doing a lot of track work, and even then, bolt failure is basically unheard of. Are they better? Yes. Is there any remotely tangible benefit to 99.9% of users? No. JEA1K said:
E90_M3Ross said:
Evolve had a 152k mile one that was on its original bearings.
Just because someone owned it for that long and used as a daily driver doesn't mean it was warmed up gently. Even if someone uses it 50 miles a day but thrashes from cold it still will cause significant wear.
I know, I saw it as well. Just because someone owned it for that long and used as a daily driver doesn't mean it was warmed up gently. Even if someone uses it 50 miles a day but thrashes from cold it still will cause significant wear.
Who knows, I'm just stating that mine hadn't blown up by 128k miles ... based on internet folklore alone, it should have blown up way before then .... even if it was warmed up properly.
Maybe thrashing it from cold is the best thing ... we just don't know?
All we know for sure is 'the internet scare stories'.
JEA1K said:
SlimJim16v said:
One specialist also uses ARP bolts when doing the bearings.
Its just prudent to do it a the same time ... it adds little to the overall cost in terms of parts and labour, so its a no brainer for most and advised by specialists who work on S65's. fido said:
I went for 10litres of Mobil 1 5W50 in the end. The engine is out of warranty now and I just want to keep my bearings shiny as possible with cold starts!
With the updated ACL bearings, regular oil changes and generally treating it well from cold I do not believe there should be any cause for concern.
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