10-19-2014, 08:02 AM
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#1
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Registered User
Join Date: Oct 2013
Location: Roseville
Posts: 27
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Replacement engine numbers 1998 Boxster
i was performing some maintenance on my 98 boxster last weekend and noticed my engine stamp had an unusual looking "R" on the end of the series. I am the fourth owner of this boxster but the previous owners failed to include maintenance records.
Does the "R" stand for replacement ? 
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Paul Ri-Chard
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10-19-2014, 08:22 AM
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#2
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Registered User
Join Date: Sep 2008
Location: Agoura Hills (LA) So.Cal.
Posts: 1,574
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I believe that is the part number for the valve cover.
Your engine number will look like this.
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1995 Porsche C4 Cab
2016 BMW M2, 6 Speed LBB - ED 7/2016
1997 993 Cab - Sold; 1997 993 Turbo - Sold
2001 Boxster S - Original Owner - 30K Miles -SOLD
Last edited by Chuck W.; 10-19-2014 at 08:24 AM.
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10-19-2014, 08:38 AM
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#3
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Registered User
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,277
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Quote:
Originally Posted by Paul Ri-Chard
i was performing some maintenance on my 98 boxster last weekend and noticed my engine stamp had an unusual looking "R" on the end of the series. I am the fourth owner of this boxster but the previous owners failed to include maintenance records.
Does the "R" stand for replacement ? |
No, you are looking at a part number, not the engine number. And if it were a factory replacement engine, it would contain the letters "AT".
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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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10-19-2014, 09:42 AM
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#4
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Registered User
Join Date: Oct 2013
Location: Roseville
Posts: 27
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Quote:
Originally Posted by Chuck W.
I believe that is the part number for the valve cover.
Your engine number will look like this.
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The engine stamp serial # is viewed from top or bottom or bottom of engine. Near tranny or starter as in your picture ?
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Paul Ri-Chard
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10-19-2014, 09:49 AM
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#5
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Registered User
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,277
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Quote:
Originally Posted by Paul Ri-Chard
The engine stamp serial # is viewed from top or bottom or bottom of engine. Near tranny or starter as in your picture ?
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It is on the oil sump rail.
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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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10-19-2014, 10:28 AM
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#6
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Motorist & Coffee Drinker
Join Date: Jul 2014
Location: Oklahoma
Posts: 3,667
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Quote:
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It is on the oil sump rail.
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In case, like me he's not sure what an 'Oil Sump Rail' is:
That's the bottom of the engine, right side. It is just forward of where the O2 sensor sticks out from the exhaust.
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10-19-2014, 11:36 AM
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#7
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Registered User
Join Date: Sep 2008
Location: Agoura Hills (LA) So.Cal.
Posts: 1,574
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Quote:
Originally Posted by 78F350
In case, like me he's not sure what an 'Oil Sump Rail' is:
That's the bottom of the engine, right side. It is just forward of where the O2 sensor sticks out from the exhaust.
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And, it will most likely gunked over. Look for a flat spot and rub there.
__________________
1995 Porsche C4 Cab
2016 BMW M2, 6 Speed LBB - ED 7/2016
1997 993 Cab - Sold; 1997 993 Turbo - Sold
2001 Boxster S - Original Owner - 30K Miles -SOLD
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10-19-2014, 10:30 PM
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#8
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Registered User
Join Date: Oct 2013
Location: Roseville
Posts: 27
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Got it, thank you !😊
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Paul Ri-Chard
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10-20-2014, 06:18 AM
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#9
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Engine Surgeon
Join Date: Aug 2008
Location: Cleveland GA USA
Posts: 2,425
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It can also have an "X" in the number to identify a reman engine.
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Jake Raby/www.flat6innovations.com
IMS Solution/ Faultless Tool Inventor
US Patent 8,992,089 &
US Patent 9,416,697
Developer of The IMS Retrofit Procedure- M96/ M97 Specialist
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10-20-2014, 06:38 AM
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#10
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Track rat
Join Date: Nov 2006
Location: Southern ID
Posts: 3,701
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The "R" stands for "Race" and should be always painted red. 
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2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor-Ret.
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