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Old 09-07-2019, 05:54 PM
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3.0 diesel vacuum pipes

I had my indy change glow plugs last year - these tend to only last about 150,000 miles on six cylinder BMW diesels, in my experience. While changing all plugs (2 were shot, one was 'lazy') the mechanic noticed a collapsed vacuum pipe on the inlet side and changed this, advising me to have the rest done when possible. So I had the other vacuum pipes replaced, albeit last month. They were all pretty much shot on the inlet side, but the exhaust (turbo) side were surprisingly OK and didn't need changing.
One to watch if you run a diesel X5. The vacuum setup looks complex and collapsed pipes won't do any good. The car is running really well now, so something was probably not right before the changes.
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Old 09-07-2019, 10:00 PM
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Quote:
Originally Posted by Moments View Post
I had my indy change glow plugs last year - these tend to only last about 150,000 miles on six cylinder BMW diesels, in my experience. While changing all plugs (2 were shot, one was 'lazy') the mechanic noticed a collapsed vacuum pipe on the inlet side and changed this, advising me to have the rest done when possible. So I had the other vacuum pipes replaced, albeit last month. They were all pretty much shot on the inlet side, but the exhaust (turbo) side were surprisingly OK and didn't need changing.
One to watch if you run a diesel X5. The vacuum setup looks complex and collapsed pipes won't do any good. The car is running really well now, so something was probably not right before the changes.
Thanks for the info.

When I changed my glow plugs last year, along with the exhaust manifold, I replaced a number of worn looking vaccum lines while I was in there. In my case, the outer cotton was pretty well worn in places but the rubber lines seemed OK. As they are so hard to get to I figured it was better to replace them while I was in there.

I'll keep in eye on the inlet-side vacuum lines...
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