986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Huge Smoke Screen From My Boxster At a Track Day

Gelbster · 09-08-2016, 06:21 PM

The Prime Suspect in identifying the cause was ..........guess whoo....yup Jake !
"The pumps are also installed incorrectly in their bores or the body is disassembled and phased incorrectly into the housing."
"Is the pic of the scavenge pump taken on bank 1 or bank 2 of the engine? Its not totally clear.
Have you taken the scavenge pump apart? It is symmetrical and the body can be assembled out of phase and still fit, but have this symptom. "
Here is a reason why the mistake may have occurred -I stumbled into it when I rebuilt my engine. I was fanatical about marking everything with a paint pen. Both scavenge pumps look identical - but they are not -quite Unless you have studied the long Post by Insight on Timing as if your life depended on it ,you could easily miss it as a noob. I did but luckily caught myself.
This is a good example of the standard of work required on these cars. If you think it is "just nuts & bolts-like any other car" ,you'll fail.
Kudos to Jake and Racer Boy for doing the research.Thanks for Posting this because we tend to fixate on the AOS and X51 baffles for symptoms like this smoking.
See pge 7 photos, Post 91 scroll down for the exact photo required here:
http://rennlist.com/forums/996-forum/672370-engine-rebuild-part-3-the-finale-7.html
See Waynes comments alongside Fig 25 here:
http://www.pelicanparts.com/techarticles/Boxster_Tech/16-ENGINE-Camshaft_Swap_and_Chain_Tensioner/16-ENGINE-Camshaft_Swap_and_Chain_Tensioner.htm
and
http://www.pelicanparts.com/techarticles/Boxster_Tech/Disc163/BoxsterTech-163.htm

09-08-2016, 06:21 PM	#23
Gelbster Registered User Join Date: May 2014 Location: S.California Posts: 2,029	The Prime Suspect in identifying the cause was ..........guess whoo....yup Jake ! "The pumps are also installed incorrectly in their bores or the body is disassembled and phased incorrectly into the housing." "Is the pic of the scavenge pump taken on bank 1 or bank 2 of the engine? Its not totally clear. Have you taken the scavenge pump apart? It is symmetrical and the body can be assembled out of phase and still fit, but have this symptom. " Here is a reason why the mistake may have occurred -I stumbled into it when I rebuilt my engine. I was fanatical about marking everything with a paint pen. Both scavenge pumps look identical - but they are not -quite Unless you have studied the long Post by Insight on Timing as if your life depended on it ,you could easily miss it as a noob. I did but luckily caught myself. This is a good example of the standard of work required on these cars. If you think it is "just nuts & bolts-like any other car" ,you'll fail. Kudos to Jake and Racer Boy for doing the research.Thanks for Posting this because we tend to fixate on the AOS and X51 baffles for symptoms like this smoking. See pge 7 photos, Post 91 scroll down for the exact photo required here: http://rennlist.com/forums/996-forum/672370-engine-rebuild-part-3-the-finale-7.html See Waynes comments alongside Fig 25 here: http://www.pelicanparts.com/techarticles/Boxster_Tech/16-ENGINE-Camshaft_Swap_and_Chain_Tensioner/16-ENGINE-Camshaft_Swap_and_Chain_Tensioner.htm and http://www.pelicanparts.com/techarticles/Boxster_Tech/Disc163/BoxsterTech-163.htm Last edited by Gelbster; 07-19-2017 at 08:02 AM.