924Board.org

Bockscar · Joined: 16 Nov 2010 Posts: 392 Location: Sandy, Oregon

I pulled the fuel injectors in my 79' 924 and two of the injectors have a pretty fair amount of rust on the tips.

Is it safe to soak the injectors in something like Seafoam and use a wire brush on them? The rust looks superficial but since the tips are so small, I can't easily access them with anything but a brush or something.
_________________
Brian
'79 924 - Restoration In Progress
'81 924 Turbo w/EFI - Scrapped

Kenodog · Joined: 25 Jun 2003 Posts: 2669 Location: Vancouver,B.C.

Mild caustic soda solution in an ultrasonic bath for 24 hrs. Good as new.

Leigh
_________________
1979 Euro 931, Olive
1981 931, Sabine
1991 Ford Ranger XLT 4x4, Ricky
1996 Ford E-350 ex-FedEx Van
2014 Mazda CX-5 (Kinderwagon)
2019 KTM 790 Adventure
2024 KLX300
2024 KLX140

Bockscar · Joined: 16 Nov 2010 Posts: 392 Location: Sandy, Oregon

Welp I cleaned the injectors and pulled the pin out of one of the especially rusty ones. Now I am unsure about the others. At about $60 an injector, this kind of sucks.
_________________
Brian
'79 924 - Restoration In Progress
'81 924 Turbo w/EFI - Scrapped

morghen · Joined: 21 Jan 2005 Posts: 9102 Location: Romania

if you decalibrate that spring inside or damage the sealing or difusing cone with the wire brush, they are worthless. dont wire brush them!
_________________
Supercharger and EFI kits
https://www.the924.com

musicalannette · Joined: 21 Feb 2012 Posts: 413 Location: UK

i had to replace a set, the sprung loaded spray defuser/injector wall gets warn with time. it is under low fuel pressure with no flow where there will be leaks if there is wear. The spray pattern can also become poor and impossible to correct if is it warn.

There are all sorts of things on the internet saying you can clean them, this is true, but the wear is what you cant see and I doubt the guys would see it as its at very very low pressure. there you get drips.at higher pressures the spray pattern is poor(this can be corrected by adjusting the sprung defuser, but then check again for leaks.)

Best thing to do with the old ones is smash them with a hammer, then some poor guy doesn't get 2nd hand ones that are never going to work right.

All are different by the way, the 924 injectors will only be similar to a few other cars. there are many many different injectors.
_________________
I KNEW white wall tyres were invented by Americans .....just not at Boeing.... to be fitted on the 737.....