remove 911 sc engine - help

[tom1975]

Hello guys, I want to remove my 1983 911 sc usa spec engine, I have some problems of vacuum leak from the cis fuel system, I wanted while I was removing the engine overhaul and replace parts that can be fix only when engine is disassembled.
I have a lift and all power tools to disassemble the motor
I bought several parts:
Fuel Injector Sleeve Valve
Fuel Accumulator
Fuel Injector
Fuel Injector O-Ring
Intake Manifold Gasket
Air Intake Boot.
What more parts do you recommend me to Purchase ?
What other engine components you guys recomend me to fix During the engine is taken out and i have the possibility to easily reach and repair?
thanks
tom

[tom1975]

[boyt911sc]

Tom,

Dropped the engine safely first and not worry about the replacement components at this point. Are you sure the FA (fuel acumulator) is defective? Test and confirm. Do you have a CIS fuel pressure gauge kit? This is a mandatory tool for trouble shooting CIS or any fuel injection system for that matter. Your air box could be cracked but wait till you test it. FF (fuel filter) is replaced after several thousand miles, like spark plugs, old and brittle fuel lines, etc. Mount the engine on a an engine stand and start your investigation. Keep us posted.

Tony

[tom1975]

hi tony
i dont have a CIS fuel pressure gauge kit. i want to buy online but dont know what is good for me .
There are parts availability problem in Israel, and I use a friend's place to do the work and I limited in time, so I thought just buy all the parts before I need to fix
And refresh the assemblies of the engine.
It seems to me anyway that I have to remove the engine,
My engine faking, I sprayed carburetor spray on the area behind the engine near the fuel distributor.
and before I had a problem with one of the Fuel Injector Sleeve, after i spraied on him its also made a rev change and now it's stuck,
I can not get it out becouse foolishly Before I bought new Sleeves I took out the fuel injector and the Sleeve went with him out and the rubber ring of the sleeve was dried so I put some victor reinze sealing compound on it and pushed it back
I thought I I'll warm it with a small torch the sleeve and try to pull it but I'm afraid
last time I used a very large force to pull it out and I could not, I am afraid to do damage,is there another method to pull them out?
I understand that i can not disassemble the problematic fuel manifold of the stuck sleeve and i must to remove the engine out for pull out the old sleeve.
thanks
tom

[Walt Fricke]

If I understand the issue, you used some kind of epoxy or other strong adhesive to solve a problem with the plastic sleeve (the kind of thing in your pictures).

Is your problem getting the injector out? You ought to be able to rig up a way to pry on it. If you are careful, you can avoid damaging it. But if it won't come, just wait until the engine is out and you have removed the manifold.

With the manifold out, you can press on the end of the injector which is in the manifold. With care you ought not to damage the middle part of the end, where the fuel sprays out. I think you could use a wood block and a hammer. Ought to break stuff loose.

If it is the sleeve you are worrying about getting out, don't worry too much - you are going to replace it. They get a bit brittle with age, so you can break it up some. You can drive it from the manifold end. You could probably just drill it out - carefully so you don't hit the aluminum, but enough so you can get the rest out.

And with the manifold out, and the injector out, trying heat would be an option - as long as you keep it down below the aluminum melting point you may be good. You could pull another sleeve and try the heat on it.

Having six new sleeves on hand is always a good precaution when pulling injectors, even though usually nothing bad happens.

[tom1975]

hi
I have no problem to getting the injector out.
i have problem to getting the sleeve out .
i dont used epoxy, i used Sealant based on silicone Like in the picture I attached and I smeared a little on the old sleeve rubber (Before I bought new sleeves and rubbers , I thought I could solve like that the vacuum leak).
I have attached a picture with a red arrow shows where I smeared the material.
Now the sleeve is stuck ):

[tom1975]

I succeed to bring out the sleeve
I used a torch, I heated very little Spot on sleeve,
Then using a flat screwdriver and a hammer broke it and pulled out
Then I put a thin tube on the vacuum cleaner and just in case I Sucked all the little pieces that fell inside.
I now have three new sleeves (on the left side of the engine).

[boyt911sc]

Tom,

Those fuel injectors shown in the pictures were not properly installed. The o-rings should not be visible when you installed the injector correctly. Hope you pushed them more in to get the o-ring on the inner groove.

If you plan to work and maintain your car running year round, invest on a fuel pressure gauge kit and a good maintenance manual or book like Bentley or the more expensive factory shop manual (optional).

Tony

[MetalDoc]

Hi Tom,

What is they grey stuff smeared around the injector and on the intake runner?

Paul

[tom1975]

Thank you tony !!! really fun that we have professionals like you who help us
I have a large o-rings,i need to buy other , it should sit within the sleeve as in the pictures I attached,yes ?

[tom1975]

Originally Posted by MetalDoc

Hi Tom,

What is they grey stuff smeared around the injector and on the intake runner?

Paul

hi, I know it's disgusting i have to clean it up, it remains of sealant like the picture

[tom1975]

Originally Posted by boyt911sc

Tom,

Those fuel injectors shown in the pictures were not properly installed. The o-rings should not be visible when you installed the injector correctly. Hope you pushed them more in to get the o-ring on the inner groove.

If you plan to work and maintain your car running year round, invest on a fuel pressure gauge kit and a good maintenance manual or book like Bentley or the more expensive factory shop manual (optional).

Tony

I have book 101 projects, is good or you recommend something more serious?
Where I buy a fuel pressure gauge? Israel has a kit that can be used for all kinds of cars,

I am attaching a picture of the set i can buy in isreal , could you please tell me if it fits?, Thanks

[boyt911sc]

Originally Posted by tom1975

Thank you tony !!! really fun that we have professionals like you who help us
I have a large o-rings,i need to buy other , it should sit within the sleeve as in the pictures I attached,yes ?

Tom,

I'm not a professional auto mechanic just another typical DIY'er that enjoys CIS troubleshooting. The bottom picture shows the correct way. The pressure gauge you are planning to buy has more parts you don't need nor use for your car. You need a simple set-up with the correct metric fitting and a shut-off valve. That's all I use all these years. A $55 CIS kit from J.C. Whitney purchased twenty years ago and still in great working condition.

Correction: I mentioned in my previous post that the injector o-ring should not be visible. That's not correct. It should be visible like shown above. I was thinking of the other o-ring. My mistake.

Don't forget to pressure test the system. Use an air compressor or tire pump compressor to pressurize the system (engine) and look for sources of air leaks. Without a CIS pressure gauge kit, you won't know how much control, system, and residual pressures you have now. And you are hoping they are within spec. Unfortunately, knowing these data is critical to how your engine performs. Keep us posted.

Tony

[tom1975]

Hi friends, finally I changed only the fuel injectors, sleeves,o rings and i solved the problem ,
now my engine work perfect .
thanks to all of you

[hassanov]

This is a good question and I would like to say that Am agree with boyt911sc and support his idea.