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Old 07-11-2013, 02:29 AM   #1
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Had interesting chat with a Porsche Specialist about IMS failures

...wish I could have recorded the phone conversation - I forget most of it now, but I'll give you the gist.

These guys are a specialist at fitting LN bearing upgrade.

They are seeing about 5% of these porsche engines failing, but!
there are about 5 common reasons for engine failure and IMSB is just one of then.

They have only seen one IMSB fail in the last year, yet many others with cracked cylinder heads, or broken timing belts etc.

What I got from this conversation is that, yes, the IMSB can fail, gut it's just as likely something else will fail too.

My car is worth about £5K - the upgrade will cost around £1K. So it's all a gamble of course.
My oil is clean so I'll take the risk

This of course is always a heated subject, but the phone call did open my eyes to other engine problems that seem to get forgotten.

has IMSB failures overshadowed other reasons for engine failures?

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Old 07-11-2013, 03:04 AM   #2
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Just search "mode of failure" and you'll see lots of discussions on this. In fact, search that expression limited to posts by Jake Raby...he's found lots of them through the years. I believe he's up to 23 or 24 last time I looked.
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Old 07-11-2013, 03:09 AM   #3
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Originally Posted by tomc88 View Post
...wish I could have recorded the phone conversation - I forget most of it now, but I'll give you the gist.

These guys are a specialist at fitting LN bearing upgrade.

They are seeing about 5% of these porsche engines failing, but!
there are about 5 common reasons for engine failure and IMSB is just one of then.

They have only seen one IMSB fail in the last year, yet many others with cracked cylinder heads, or broken timing belts etc.

What I got from this conversation is that, yes, the IMSB can fail, gut it's just as likely something else will fail too.

My car is worth about £5K - the upgrade will cost around £1K. So it's all a gamble of course.
My oil is clean so I'll take the risk

This of course is always a heated subject, but the phone call did open my eyes to other engine problems that seem to get forgotten.

has IMSB failures overshadowed other reasons for engine failures?
These engines do not have timing belts............
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Old 07-11-2013, 07:12 PM   #4
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Originally Posted by tomc88 View Post
...wish I could have recorded the phone conversation - I forget most of it now, but I'll give you the gist.

These guys are a specialist at fitting LN bearing upgrade.

They are seeing about 5% of these porsche engines failing, but!
there are about 5 common reasons for engine failure and IMSB is just one of then.

They have only seen one IMSB fail in the last year, yet many others with cracked cylinder heads, or broken timing belts etc.

What I got from this conversation is that, yes, the IMSB can fail, gut it's just as likely something else will fail too.

My car is worth about £5K - the upgrade will cost around £1K. So it's all a gamble of course.
My oil is clean so I'll take the risk

This of course is always a heated subject, but the phone call did open my eyes to other engine problems that seem to get forgotten.

has IMSB failures overshadowed other reasons for engine failures?
The Boxsters in the UK have timing belts? You should change those every 100,000 miles.
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Old 07-11-2013, 08:32 PM   #5
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Man..tough crowd.
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Old 07-12-2013, 12:01 AM   #6
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Man..tough crowd.
That's what I was thinking...lol
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Old 07-12-2013, 03:58 AM   #7
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Man..tough crowd.
No kiddin'.

We need to, as a group, get together, go to some comedy club somewhere. We obviously have some wonderfully accomplished hecklers in the group.
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Old 07-12-2013, 04:27 AM   #8
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We need to, as a group, get together, go to some comedy club somewhere. We obviously have some wonderfully accomplished hecklers in the group.
A Rabbi, a timing belt, and Sara Jessica Parker all walk into a bar. Bartender says, "hey, why such a long face?"!!!

Thank you very much. I'm here all week. Tip your waitresses well.
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Old 07-12-2013, 05:26 AM   #9
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A Rabbi, a timing belt, and Sara Jessica Parker all walk into a bar. Bartender says, "hey, why such a long face?"!!!
Baa-Dum Tssssssh!

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