Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Performance and Technical chat

Reply
 
LinkBack Thread Tools Display Modes
Old 12-27-2019, 12:33 PM   #1
Registered User
 
truegearhead's Avatar
 
Join Date: Jul 2011
Location: Richmond, VA (The Fan)
Posts: 712
Motor ran without oil. Toss it or rebuild?

Last season I lost an accusump line and ran the car completely out of oil because Iím an idiot. Iíve since swapped it out with a 2.7 but still have the old motor sitting around. It still runs but even with new oil in it you can hear the bearings. Are these worth rebuilding? Can I do anything creative like install a 3.6l crank? Itís an early 2.5

Cheers,
Stu

__________________
1997 2.5 Boxster NASA Time Trial track car
2003 911 C2
NASA HPDE Instructor
truegearhead is offline   Reply With Quote
Old 12-27-2019, 03:01 PM   #2
Registered User
 
BYprodriver's Avatar
 
Join Date: Oct 2008
Location: O.C. CA
Posts: 3,348
Garage
Quote:
Originally Posted by truegearhead View Post
Last season I lost an accusump line and ran the car completely out of oil because Iím an idiot. Iíve since swapped it out with a 2.7 but still have the old motor sitting around. It still runs but even with new oil in it you can hear the bearings. Are these worth rebuilding? Can I do anything creative like install a 3.6l crank? Itís an early 2.5

Cheers,
Stu
Definitely no 3.6L cranks, I have a set of NOS Porsche rod bearings for sale if you need them.
__________________
2000 S Speed Yellow LN 3.6L cylinders & pistons, triple row IMSB upgrade, R&R connecting rods, billet tensioner paddle&,oilpump driveshaft.Heads rebuilt by F6I with new valves & springs.Cayman airbox & MAF housing, 996 intake plenum & 75mm T/B. Fabspeedsport converters &Dansk muffler
BYprodriver is offline   Reply With Quote
Old 12-27-2019, 06:55 PM   #3
Registered User
 
Qingdao's Avatar
 
Join Date: Jul 2019
Location: Charleston
Posts: 103
I'm just gonna toss my old 2.5 block (IMS failure) at the local European shop. If they give me like $500 I'll take it. If not it becomes a coffee table.

That's my plan, but you might split yours open and find the bores clean and nothing warped or too badly mangled.
__________________
'72 Ghia
'74 CB550
'84 RX7
'88 Cheyenne
'99 Boxster
Qingdao is offline   Reply With Quote
Old 12-27-2019, 08:54 PM   #4
Registered User
 
AZ986S's Avatar
 
Join Date: Jun 2016
Location: Arizona
Posts: 364
Well my friend, you are not alone... Nothing to do with the Accusump, just human error in this case.
When I get another engine back into the car, maybe I'll tear the block down and see what kind of damage complete oil starvation does to an M96 engine I guess my question would be if the camshaft/head cover journals are damaged or still usable. There was certainly a heavy rod knock and low oil pressure light.
__________________
2002 Boxster S - NHP 200 Cell Headers,test pipes,Borla CatBack,Competition Plenum,74 mm TB, EVOMS Tune,Tarett UDP,Eibach Swaybars,BIlstein PSS9s,TuneRS rear toe links,wheel studs,15 mm wheel spacers on all 4,EBC yellow stuff pads,Sebro rotors, EBS oil baffles,160 deg Thermostat,2 quart Accusump,full filtration remote oil filter,rad fan switch,custom gauge/switch plate, Race Capture data logging, 90K miles
AZ986S is offline   Reply With Quote
Old 12-28-2019, 07:40 AM   #5
Artist, 986S tinkerer
 
NewArt's Avatar
 
Join Date: Aug 2013
Location: Montreal, Canada
Posts: 1,585
Quote:
Originally Posted by truegearhead View Post
Last season I lost an accusump line and ran the car completely out of oil because Iím an idiot. Iíve since swapped it out with a 2.7 but still have the old motor sitting around. It still runs but even with new oil in it you can hear the bearings. Are these worth rebuilding? Can I do anything creative like install a 3.6l crank? Itís an early 2.5

Cheers,
Stu
If you have the space and the time, you might consider tearing it down. You can see whether it can be easily salvaged assuming, of course, that you can do it yourself. If it were a 3.2 it would be worth putting some effort and money into it but I wouldnít imagine that thereís a lot of call for a 2.5. Iíve done a couple of teardowns which you can see on my YouTube channel: https://www.youtube.com/user/12shoes2
__________________
James
2004 986 S
987 air intake TB and plenum, Mantissport 2 litre sump, UDP, Bilstein B6 with H&R lowering spings, re71-rs for track, other stuff.
https://www.youtube.com/user/12shoes2
NewArt is offline   Reply With Quote
Old 12-28-2019, 02:16 PM   #6
Registered User
 
BYprodriver's Avatar
 
Join Date: Oct 2008
Location: O.C. CA
Posts: 3,348
Garage
Quote:
Originally Posted by AZ986S View Post
Well my friend, you are not alone... Nothing to do with the Accusump, just human error in this case.
When I get another engine back into the car, maybe I'll tear the block down and see what kind of damage complete oil starvation does to an M96 engine I guess my question would be if the camshaft/head cover journals are damaged or still usable. There was certainly a heavy rod knock and low oil pressure light.

Usually the rod bearings are the 1st to go followed by the crankshaft rod surfaces soon after. Good crankshafts are getting hard to find & expensive.

__________________
2000 S Speed Yellow LN 3.6L cylinders & pistons, triple row IMSB upgrade, R&R connecting rods, billet tensioner paddle&,oilpump driveshaft.Heads rebuilt by F6I with new valves & springs.Cayman airbox & MAF housing, 996 intake plenum & 75mm T/B. Fabspeedsport converters &Dansk muffler
BYprodriver is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 06:50 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page