996.2 M96 engine teardown - Rennlist Discussion Forums



996.2 M96 engine teardown

Reply
 
Thread Tools Search this Thread
Old 06-01-2016, 05:16 PM   #1
0x00
User
Thread Starter
 
Join Date: Oct 2011
Location: Boulder, CO
Posts: 13
Default 996.2 M96 engine teardown

Let me know if I got the wrong forum or if I mis-identified the engine!
admin: move as appropriate, total nooobie here.

Recently acquired engine core from 2003 911 C4S. 85K miles approx on the odo. Possible swap into Boxster if I can fix it with reasonable expense. I'll post up pix as I learn how to do that.

Engine was sold as 'loud knocking from #4 at half crank speed.'
Engine has LN IMSB kit in place. I haven't pulled it yet, don't know if it is steel, hybrid or ceramic. I don't know its condition yet.
Camera in all bores. Nothing conclusive visible. Something strange in #4...possible gap between bottom of bore and piston. Possible object although couldn't move object. Possible 'clean area' on crown near bottom.
Pulled both valve covers prior to purchase. Nothing unusual.
Pulled sump cover, middle full of metal, both aluminum and steel.
Removed most 'outer perimeter' stuff. I can now see a big end or two. Nothing unusual so far. found a metal flake under the oil fill accordion tube. only place I have seen metal besides in sump (and filter housing).
with intake/runners and exhaust off, I can look and camera into 'back of valves' areas. Nothing unusual.

Next steps to break timing and pull heads....then we'll know the rest of the story. I'll probably turn it over a bit and look around more but at this point I assume I won't see anything until I am closer to the combustion chambers.
Attached Images
 
0x00 is offline   Reply With Quote
Old 06-01-2016, 05:26 PM   #2
0x00
User
Thread Starter
 
Join Date: Oct 2011
Location: Boulder, CO
Posts: 13
Default

It looks like the forum machinery automatically resized the picture. Good news.
Shortcut through a day of disassembly and notes:


Intake plastic removed. Access to other pieces.<br/>Fuel rails and intake runners still attached.
0x00 is offline   Reply With Quote
Old 06-04-2016, 11:25 AM   #3
0x00
User
Thread Starter
 
Join Date: Oct 2011
Location: Boulder, CO
Posts: 13
Default Bad rod

This may have something to do with the reported knocking.
I have gotten the heads off however this could have been viewed through the hole for the oil accordion fill...I just didn't look close enough before. The picture was taken through this hole of #4 big end.
Attached Images
 
0x00 is offline   Reply With Quote
Old 06-07-2016, 04:08 PM   #4
0x00
User
Thread Starter
 
Join Date: Oct 2011
Location: Boulder, CO
Posts: 13
Default EXPERT HELP REQUEST!

Is this Lokasil cracking? LocoSil (you'd be crazy to buy one)? Beginning of D-chunking? This is my first really close look at the bores as I continue inspection of parts. The sealing surfaces of the bores look fine (didn't scrape all the black gasket stuff off) and there are lines that apppear to be manufacturing marks but I can't see cracks across the thin tooobs (they have wall of about 0.300" or 7.62mm if anyone is interested).

Most bores have these longitudinal lines that look like micro cracks.

One or two have the lines in the 'D-Chunk' fashion.

if anyone recognized the appearance of early d-chunking please advise!

thanks
Attached Images
        
0x00 is offline   Reply With Quote
Old 12-04-2016, 12:43 PM   #5
fasted911
New User
 
fasted911's Avatar
 
Join Date: Nov 2014
Location: Columbia,SC
Posts: 2
Default

good morning,new at this forum thing. im almost there, just bought a 00 3.4 engine for my 00 996 cab.,tiptronic. dont know anyone near me or on the forum yet but i have to rebuilt my engine too. so are things coming. with your conversion? if i understood correctly you are putting that 3.6 in a boxster?
fasted911 is offline   Reply With Quote
Old 12-05-2016, 01:34 PM   #6
0x00
User
Thread Starter
 
Join Date: Oct 2011
Location: Boulder, CO
Posts: 13
Default never moved forward

we decided not to mess with putting it in a different car, and had arranged to buy an 03 tip cab 996 that had no engine, but it sold out from under us.

the boxster with bad engine we had sold as-is just to be done with it.

so we are parting out the engine rather than gamble the excessive rebuild cost and then try to sell.

The crank is at Mile High and passed magneflux, but I haven't authorized the rework yet.

We planned to reassemble it with ductile iron liners but lost interest without having a car to drop it into.

It could possibly be reassembled without liners, buy why perpetuate a design defect without correcting it while it is down? so, it is sitting in pieces here in Boulder.

thanks!
0x00 is offline   Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Bluehorseshoe's GTS Journal bluehorseshoe 991 162 04-02-2017 12:49 PM
Protomotive Stage 1 Twin Turbo Install DIY TheOtherEric 993 Forum 60 11-27-2016 07:47 PM
New member needs help!! Carbon Footprint 996 Turbo Forum 33 06-09-2016 05:56 PM
Louis Ott's full valve cover video now on youtube ptuomov 928 Forum 162 06-22-2010 06:11 PM
So a dead bug killed my turbo? Porsche-O-Phile 944 Turbo and Turbo-S Forum 35 09-09-2004 04:08 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -3. The time now is 03:21 AM.


Copyright ę 1998 - 2017 Rennlist.com
 
  • Ask a Question
    Get answers from community experts
What's your question?
Send