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Voodoocars · Joined: 06 Jun 2004 Posts: 10 Location: Coventry

I need to replace my injectors on my 1980 924 na.I also need to replace the plastic holders that they sit in but they won't budge.Do you have to break them to get them out?What about debris falling into inlet manifold?I have tried unscrewing them with an allen key but no joy.
Regards
Ian

Porscheaddiction · Posted: Tue Jun 28, 2005 11:24 pm Post subject:

What size key did you use? in a pinch u could try a 3/8inch extension bar..I got one out that way(probably luck) To get the rest out I bought a 12mm bit socket. Worked very well. They should come out with out breaking just take your time.
Chris.
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1981 924 NA (Restoring mode)
1984 928S (Enjoying the driving season)

Jazzerpet · Joined: 07 Apr 2003 Posts: 186 Location: Omaha, NE.

I thought the injectors in the NA are compression fit with an o-ring seal. We just changed the ones on Tom’s car at funfest. His is and 80 NA., are the European models different?
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1980 931
1985 ½ 944
Member of the “Omaha Crew”

Porscheaddiction · Posted: Tue Jun 28, 2005 11:59 pm Post subject:

He's talking about the plastic inserts that are inside the head that the injectors push into.
Chris.
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1981 924 NA (Restoring mode)
1984 928S (Enjoying the driving season)

gohim · Joined: 02 Nov 2002 Posts: 4459 Location: Rialto, CA

Somebody may have used the wrong stuff to seal the inserts when they had them out before.

What color are your old ones?

The original ones supplied by Porsche were a white or translucent white (they are not made of what most people would describe as a normal plastic material) color. The newer part that replaces them are a burnt orange color, and made of a more conventional plastic material.

The original ones should not be that hard to remove, if you have the correctly sized hex wench, or the tool made specifically for removing them. The original parts are a little soft, and they may break up when you go to remove them.

When you go to install replacements, you need to seal them. I use a permanent, NON-HARDENING (you may want to remove them someday) teflon-based thread sealer from PERMATEX that comes in a squeeze tube.

endwrench · Joined: 07 Dec 2002 Posts: 1631 Location: Victor, Montana

I've pulled three sets of these and only got 5 out whole. I have the correct 12mm allen wrench but I still had to break them up to get them out. Luckly, all heads were off the engine. You may have to pull the intake in order to catch the debris that falls thru. Be careful not to bugger the threads.

Todd

augidog · Joined: 03 Mar 2003 Posts: 1360 Location: New Jersey

Mine came out leaving the threads behind.
I put the teflon on and screwed them slightly in each time backing them out and clearing the debris then going in a little further.
Take your time, the teflon can be used to hold the debris from falling in.
Maybe a shop vac while you unscrew them would work if you think they will just fall into bits.
_________________
1978 924 95 mile daily driver.
Audi TB/POR174M/High Flow Cat/2.25" exhaust
I knew that positive thinking thing wouldn't work.

Mike924 · Joined: 12 Aug 2004 Posts: 2601 Location: IoW UK

When I pulled mine out, three came out OK, if a little mangled, the fourth had to be chipped out. I tried not to let debris fall into the head but a few chips got through.

My hope is/was that they simply get sucked into the engine and blown out of the exhaust...

No ill effects yet...

As for sealing, I used a turn of plumber's PTFE (Teflon) tape.
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1985 Porsche 924 'Lux', Kalahari Beige (my ex)
1993 Porsche 968 Coupe, Midnight Blue, 6 spd

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