Piston oil squirter prob

orion · 06-19-2006, 10:03 AM

Hello,

I have a 2.4 T engine that during the last rebuild got a new case (don't know why, bought it in this condition). The case has markings that match the type of mag cases used for 2.4S engines (serials match).
In the process of rebuilding, I went for a complete tear down. I am now in the process of clean up and found the following. The case has piston oil squirters installed and I performed a simple test. blocking all other passageways for each squirter, I applied 2 atm of pressure (compressed air) on the inside of the squirter (the way that oil would normally flow to the squirter and out onto the piston).Only two did not allow air to pass. The other four, allowed air to pass with variable degrees of ease. When I applied pressure the other way around, the same two that did not leak, resisted while the rest allowed again air to pass.
The Porsche Manual says that these are supposed to open at around 3-4 atm. So my question is: are these four squirter valves stuck or is my test giving a headache for nothing?
If they are stuck, how do you go about getting them unstuck?
Can they be replaced - and by whom (local Porsche dealer had to check books and manuals meaning that they did not know what to do - still waiting ofr their answer)? (the Porsche Manual says "No" on the matter I think)

Help anyone?

Thanks

davidppp · 06-19-2006, 11:15 AM

Hello, Andreas.

This is IIRC well covered by Wayne in his book.

If you do not have it , stop right now!

It is the finest available resource...

Yes they can be replaced, but they may be freed up with solvents etc...

Why not test at 5 Bar?

Kind regards
David

philippeF · 06-19-2006, 01:47 PM

Hello
you should try to fill them with some solvent or equivalent, and let them one night or so....
i had the same problem, resolved this way, with a small 2bar air compressor....
Philippe

have a look

ChrisBennet · ChrisBennet's Garage

This thread has some helpful piston squirter testing info:
Piston Squirters!
-Chris

orion · 06-19-2006, 11:16 PM

I did test also at higher pressure (4 atm) and the two that resisted before, gave a nice spray (I put some brake cleaner in the passage leading to the valve).
After a bit of torture that I put them through (I admit fiddling with a small piece of wire I inserted into the valves) one of them made a small "ping" and got unstuck. So, 3 more to go.
Sorry about the new thread, I browsed through the threads and saw no immediate mention of the particular problem.
Tonight I will try blocking the passageways and filling them with solvent. I guess I will know by the end of the week by which time I'll be able to work on it again (finished building the engine stand).

BTW: How do you fight back the dirt and grime under the fingernails

Thank you for your time guys

orion · 06-26-2006, 02:20 AM

Hello everyone,

Its been nearly a week that the valves have been soaked in penetrating oil (WD40) but nothing happens. I think I might have to change them.
Greater problem still, Porsche Greece is ignoring my phone calls for support on the problem.
So, I have no choice but to take my case to my machinist (who has no specific experience with the particular job) and tell him to change the valves with new ones (I will supply them to him).
Is there any kind of guide that I can give him? a step-by-step procedure to avoid any pitfalls in the process?
I got Wayne's books but there is only a small paragraph the says that I should have them blown out.

Many thanks,

davidppp · 06-26-2006, 01:13 PM

Hello, Andreas.

I have never failed to get them going.

WD40 is not nearly aggressive enough.

I'd get some acetone, mekp, triclorethylene or similar..keep at it, work them from the front with wire, balst in and out with aerosol eg carb cleaner..

eventually they will work..

Kind regards
david

hobieboy · 06-26-2006, 04:02 PM

Andreas,
I was hoping you would have better luck than I. See this thread: How to clean piston squirters?

I ended up having to EDM it out. The squirter does not go in straight so whoever doing yours will have to 1st figure out the actual angle.

One thing you can try is to use the reaming method to see if you can get it out. That is supposed to be the standard method.

orion · 06-30-2006, 06:54 AM

I just got my hands on a small container of brake cleaner. You would be amazed at how difficult it is to find any braker cleaner product here in Greece. Nobody seems to know anything about them.
I will go through the entire procedure of soaking/probing/hoping and maybe things will work out.
Also, new from the Porsche front... they cannot answer any question since the car is not in their care...

Thank you for your help!