Show full size 924Board.org
Discussion Forum of 924.org
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 
 Technical FAQ924 FAQ (Technical)   Technical924 Technical Section   Jump to 924.org924.org   Jump to PCA 924 Registry924 Registry

How do you seal the injector holders in a 931?

 
Post new topic   Reply to topic    924Board.org Forum Index -> 931 Tech.
View previous topic :: View next topic  
Author Message
Johann  



Joined: 07 Aug 2016
Posts: 176
Location: Netherlands

PostPosted: Sat Aug 26, 2017 10:02 pm    Post subject: How do you seal the injector holders in a 931? Reply with quote

I have removed all my K-jetronic components to have them rebuilt and balanced by a CIS Specialist. One thing i noticed as I removed the injectors is that the holders are quite loose.

It might very well be that the car is leaking around the holders. What do you guys use to "seal" the holders?

I have been on the interwebs for hours looking for a type of thread locker or sealant. The only thing I can find that is compatibe with plastic is LOCTITE THREADLOCK TAPE 249 or similar plumbling tape



Your help is appreciated.
Back to top
View user's profile Send private message AIM Address
924RACR  



Joined: 29 Jul 2001
Posts: 8109
Location: Royal Oak, MI, USA

PostPosted: Sat Aug 26, 2017 11:40 pm    Post subject: Reply with quote

I have this for numerous other threaded fittings, so used it as well - combination thread lock and sealant:

(Permatex 54540)
https://www.amazon.com/Permatex-54540-Pneumatic-Hydraulic-Sealant/dp/B000HBGL14/ref=sr_1_fkmr0_1?ie=UTF8&qid=1503751105&sr=8-1-fkmr0&keywords=Loctite+54540

Not sure if it's available in your area, maybe there's something equivalent?
_________________
Vaughan Scott
Webmeister
'79 924 #77 ITB racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype
Back to top
View user's profile Send private message Send e-mail Visit poster's website
MikeJinCO  



Joined: 08 Jun 2010
Posts: 731
Location: Maysville, Colorado

PostPosted: Sun Aug 27, 2017 11:33 pm    Post subject: Reply with quote

I can't say that this is the best solution, but for sealing threads with plastic pipe a teflon pipe dope in a tube(plumbing supply) is normally used rather than tape as it flows better and won't break the plastic as tape possibly can. Tape is best on metal to metal threads.
_________________
Mike
Poco a Poco, '80 future track car
'77 924
cricketdesigns.com
Back to top
View user's profile Send private message Visit poster's website
Johann  



Joined: 07 Aug 2016
Posts: 176
Location: Netherlands

PostPosted: Mon Aug 28, 2017 4:09 am    Post subject: Reply with quote

Thank you gentlemen, I have ordered a tube of Loctite 570. It seems to be the closest to the Permatex and comes up when searching for pipe dope too
Back to top
View user's profile Send private message AIM Address
924RACR  



Joined: 29 Jul 2001
Posts: 8109
Location: Royal Oak, MI, USA

PostPosted: Mon Aug 28, 2017 10:47 pm    Post subject: Reply with quote

Actually, turns out the teflon tape isn't so good for motor applications... it doesn't seal pipe thread, but reduces the friction to allow you to tighten the thread more to achieve the metal-to-metal seal... hence why I was pointed to the Permatex stuff instead...

Very important on my racecar, where vibrations will loosen EVERYTHING not locked down...
_________________
Vaughan Scott
Webmeister
'79 924 #77 ITB racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype
Back to top
View user's profile Send private message Send e-mail Visit poster's website
924RACR  



Joined: 29 Jul 2001
Posts: 8109
Location: Royal Oak, MI, USA

PostPosted: Mon Aug 28, 2017 10:50 pm    Post subject: Reply with quote

Looked a bit more... I wonder if Loctite 545 might be a closer match to the Permatex...
_________________
Vaughan Scott
Webmeister
'79 924 #77 ITB racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype
Back to top
View user's profile Send private message Send e-mail Visit poster's website
Carrera RSR  



Joined: 08 Jan 2010
Posts: 1581
Location: Somerset, UK

PostPosted: Tue Aug 29, 2017 7:35 pm    Post subject: Reply with quote

I used Loctite 577
_________________
1980 931 - forged pistons, Piper cam, CGT turbo, 951 ducted FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife LSD
Now www.924board.org/viewtopic.php?t=34690
Then www.924board.org/viewtopic.php?t=31252
Back to top
View user's profile Send private message
knobby  



Joined: 23 May 2011
Posts: 37
Location: Cincinnati,Ohio

PostPosted: Sat Jul 07, 2018 1:42 am    Post subject: Injector socket/holder seal Reply with quote

I have a loose one.The holder(socket) seems loose on mine.
I just bought a set of new injectors and am getting ready to install them and rectify the loose thread.I donít know yet if the looseness is because of backing out of the head or what but I was wondering how your injector install went and what thread sealer compound you ended up using and also the seal between the injector and the socket/holder p/n 900 123 033 20 sealing ring,is this a generic part or did you need to obtain from Porsche?
_________________
81 RED 931 S2(daily driver),81 WHITE 931 S2(not currently drivable).
Cincinnati,Ohio
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    924Board.org Forum Index -> 931 Tech. All times are GMT + 11 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group