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  #11  
Old 03-29-2019, 10:50 AM
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Quote:
Originally Posted by crystalworks View Post
Either one is good as long as from a reputable brand. As you say, the OE is plastic and it lasted 150k.

Edit: Since a belt issue started this... I would also replace your idler pulley and tensioners for the serpentine belt and the AC belt.

I agree with both points. The plastic is lighter and easier on the bearings. The idler pulley and tensioner can cause drive belt problems, so should be replaced.

For checking the head gasket, you can do a coolant system pressure test which is an inexpensive tool that pumps air into the system and has a gauge which tells you the rate that the pressure drops. The bleed down rate will verify the condition of the head gasket.


Any system that has a cap that fits will work. This should do it:

https://www.bavauto.com/bmw-pressure-tester-b8800084
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  #12  
Old 03-29-2019, 10:57 AM
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Crystal Works, yes, just completed additional purchases of idle alternator pulley as these all look pretty soured and stiff rolling. But, do I need go and replace all the temperature sensors? Would the overheat necessarily messed them up? I am doing the thermo because I can't remember last time replaced, but around 160K my brother toasted the belts n pump so my mentor mechanic and I replaced just about everything then. Just started dismantling the components so when the parts arrive I can get this beast rolling again. Thanks.
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  #13  
Old 03-29-2019, 01:44 PM
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Issue as risen. I know why they may want to use plastic impeller. When my w.pump failed it scored the inside of the housing. I think I can smooth it off with scotch pad. Got all the parts off and I am wondering where is the best place to get new fasteners for the w.pump,thermo, and maybe tension pulleys. BTW, who is the doom-cough who setup the A/C tensioner. When replacing both spring tensioners do I attach the bottom bolts first and then the tops? And, what is the torque down for the alternator guide pulley bolt? My thermo seating was great, gasket came right off. Finally got the lower rad hose off too, now just waiting for the parts. Guess I do the garbage disposal install asap. She's getting cranky.
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  #14  
Old 03-29-2019, 01:54 PM
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Originally Posted by Bmwtvboy View Post
Crystal Works, yes, just completed additional purchases of idle alternator pulley as these all look pretty soured and stiff rolling. But, do I need go and replace all the temperature sensors? Would the overheat necessarily messed them up? I am doing the thermo because I can't remember last time replaced, but around 160K my brother toasted the belts n pump so my mentor mechanic and I replaced just about everything then. Just started dismantling the components so when the parts arrive I can get this beast rolling again. Thanks.

Heat shouldn’t kill a temp sensor.

It’s always best and easiest to replace wear components while everything is apart. The thermostat is one, along with water pump, belts, and hoses. The overflow tank is a semi-replaceable item
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  #15  
Old 03-29-2019, 05:14 PM
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Dummkopf! Thought my Dad and I were the only ones who used that. You of German descent?

Scoring shouldn't be an issue unless it somehow damaged the mating surface. As long as there are no metal pieces hanging that could dislodge in the future. Agreed, your sensors will be fine. The M54 does not use single use fasteners, any reason your are looking to replace?

I think torque values can be found in the TIS.
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  #16  
Old 03-31-2019, 12:58 AM
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Originally Posted by crystalworks View Post
Dummkopf! Thought my Dad and I were the only ones who used that. You of German descent?

Scoring shouldn't be an issue unless it somehow damaged the mating surface. As long as there are no metal pieces hanging that could dislodge in the future. Agreed, your sensors will be fine. The M54 does not use single use fasteners, any reason your are looking to replace?

I think torque values can be found in the TIS.
They can also be found in the Bentley manual.
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  #17  
Old 03-31-2019, 10:37 AM
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Originally Posted by Fifty150hs View Post
They can also be found in the Bentley manual.
Absolutely. Unless working on an N62. No, I'm not mad/disappointed about that at all.
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2010 X5 35d Build 02/10
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  #18  
Old 03-31-2019, 10:55 AM
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Manuals were made for people like me, because EOD math is... plenty, plus more, equals enough. At least that's the math for explosives

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  #19  
Old 03-31-2019, 11:35 AM
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Manuals were made for people like me, because EOD math is... plenty, plus more, equals enough. At least that's the math for explosives

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  #20  
Old 03-31-2019, 07:14 PM
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When in doubt…

C4
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