06-13-2023, 11:12 AM
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#1
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Registered User
Join Date: Apr 2010
Location: Canada
Posts: 3,121
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talk to me about case bolts ...
hi - i'm seeing some weeping from the lower case bolt directly in front of the sump, and perhaps just behind too. MIGHT be coming from the sump, but is not leaking down from ims/rms. are these bolts something that i can retorque?
thanks; i did a search that didn't give me much other than the 4 bolts that change with rms depending on 'roundness' of rms opening.
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06-13-2023, 11:29 AM
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#2
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Registered User
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,273
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Quote:
Originally Posted by The Radium King
hi - i'm seeing some weeping from the lower case bolt directly in front of the sump, and perhaps just behind too. MIGHT be coming from the sump, but is not leaking down from ims/rms. are these bolts something that i can retorque?
thanks; i did a search that didn't give me much other than the 4 bolts that change with rms depending on 'roundness' of rms opening.
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If you are referring to the bolts that hold the case halves together, if they are weeping at all, they should be replaced with new microencapsulated replacement bolts and then torqued to spec before moving to the next one.
A lot of M96 engines came with bolts that had no sealant on them, and over time they start to weep, even though they are correctly torqued to spec. Tightening them will not stop the problem, replacing them with the correct new bolts will. This is something we always look for when doing an IMS bearing, the RMS, or doing a new clutch.
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“Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
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06-13-2023, 11:38 AM
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#3
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Registered User
Join Date: Apr 2010
Location: Canada
Posts: 3,121
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thanks, i was hoping you would find this thread. yes, the bolts that hold the case halves together.
presume 900.385.270.01 -> 9A700812900
looks to be 25 of them, but the bottom two (directly in front and behind sump) are the only ones acting up; ok to just do the two?
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06-13-2023, 12:23 PM
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#4
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Registered User
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,273
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999 385 004 01 I believe is the current part number, and there are four on each end of the engine:
__________________
“Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
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06-13-2023, 12:27 PM
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#5
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Registered User
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,273
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Here is a better view:
__________________
“Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
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06-13-2023, 01:13 PM
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#6
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Registered User
Join Date: Apr 2010
Location: Canada
Posts: 3,121
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100%; thanks very much.
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09-13-2023, 09:06 PM
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#7
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Registered User
Join Date: May 2023
Location: Oakland, CA
Posts: 137
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Looks like I have the same issue. Did you try replacing the bolts?
Quote:
Originally Posted by The Radium King
100%; thanks very much.
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__________________
2001 Boxster S | Triple Black | Stock 17s | Bilstein PSS9s | 9x7 Shift Console
"Sixty percent of the time, it works every time!"
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09-14-2023, 07:26 AM
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#8
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Registered User
Join Date: Apr 2010
Location: Canada
Posts: 3,121
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no. it was the sump fasteners and the oil was migrating upwards. tightened the sump fasteners and leak went away. sump fastener torque now added to my routine maintenance checklist.
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09-14-2023, 05:23 PM
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#9
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Registered User
Join Date: May 2023
Location: Oakland, CA
Posts: 137
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Nice! I’ll have to check that out. Getting ready to do a marathon of service under there…gear oil, spark plugs, tubes, coil packs, rear brake pads, new underbody panels. Aka the while you are in there list haha ��
Quote:
Originally Posted by The Radium King
no. it was the sump fasteners and the oil was migrating upwards. tightened the sump fasteners and leak went away. sump fastener torque now added to my routine maintenance checklist.
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__________________
2001 Boxster S | Triple Black | Stock 17s | Bilstein PSS9s | 9x7 Shift Console
"Sixty percent of the time, it works every time!"
Last edited by Danimal; 09-14-2023 at 06:54 PM.
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