Printable Version of Topic

Click here to view this topic in its original format

914World.com _ 914World Garage _ Leaky fuel injector

Posted by: Keith V Jun 29 2004, 10:19 PM

Hello All,
I started my car yesterday, and could smell gas. I discovered a leaky injector. I have extra new seals for each injector. Can you give me any advise for replaceing the seals?

Thank you.

Posted by: Mueller Jun 29 2004, 10:40 PM

it's a fairly simple repair, just need a 10mm socket or open end wrench.....

inspect the fuel lines (all of them), the injector lines are known to fail (BTDT, luckly no fire)

Posted by: Dave_Darling Jun 29 2004, 11:08 PM

For the most part, the injector seals are there to keep air from leaking into the manifold, not fuel from leaking out. Fuel leaks are more likely to be in the injector itself, either between the pintle cap and the metal body, or between the metal plug body and the other plastic bits. Or, as Mike points out, the short hoses between the manifold and the injector can leak. This is the most likely leak around the injector.

Some shops seem to be able to replace the pintle caps (they are available from certain parts sellers if you know where to look and how to ask), but for the most part the fix is to replace the leaking injector.

Try the seals, but be prepared that you might have to replace the whole injector.

--DD

Posted by: Keith V Jun 30 2004, 02:34 PM

Hello Mike and Dave,
Thank you for the responses. You are probably right about the small and large O-ring seals I bought from Pelican Parts not correcting the problem. I also have a couple new injectors on hand, so I will replace everything at the same time.

Regards,
Keith

Posted by: dmenche914 Jun 30 2004, 08:31 PM

leaky injectors could be from the plastic to metal joint, if that is the case you need a new one. If however it is the rubber hose, that can be replaced. OEM injectors have a semi permanete crimped hose clamp. This crimp clamp can be carefully cut off with a hacksaw/tin snips and then the hose replaced (use high pressure injection rated hose only) use a screw on hose clamp to secure.

Hope the fix is the hose, it is a cheap repair.

PS be very careful when cutting the hose crimp clamp so as not to hold the plastic part in a vice, as the plastic part is fragile, and if torqued or otherwise upset, it may start to leak there.

good luck.

dave

Posted by: Mueller Jun 30 2004, 08:35 PM

you can buy the "correct" pre-bent hose for the injectors from HPH...and possibly other shops.........I think a bench grinder works good for taking off the metal crimp, you still have to be careful.........

Posted by: tracks914 Jul 1 2004, 10:12 AM

Fuel leaking out of the injector, (into the engine compartment) is the internal O-rings leaking. They cannot be fixed. If they were left dry for some time they may only leak for a while until the rubber softens up, but I would replace the whole injector anyways. I just replaced 2 of them. Then do a leak test, into a test tube with all the injectors as described in this site and a crank test for calibration.
http://www.914fan.net/djet.html
If not you risk running some cylinders too lean or too rick, or just have a constant leakdown diluting you oil.

Here is what an injector look like on the inside.

Attached image(s)

Posted by: tracks914 Jul 1 2004, 10:14 AM

Once taken apart you average man cannot put them back together.

Attached image(s)

Posted by: Keith V Jul 4 2004, 09:35 AM

Thank you all for your help. I replaced the old injector and bent rubber fuel line with a new injector that had the fuel line attached with the metal fitting. The other three injectors in the car still have the bent rubber fuel lines. Which do you think is "Better"? Who is HPH, and where can I buy a replacement, and possibly four, new bent rubber fuel lines?
Regards to all that helped me.

Posted by: smg914 Jul 4 2004, 09:38 AM

The bent rubber line is the upgraded fuel line.