Hey crew,
Anybody getting their injectors done, it's a big job & while you are at it, it's time to give the engine a health check.
1.) While the injectors are out insert Inspection camera & check the pistons, normal pitting is ok, mainly looking for cracks.
2.) check the valve clearances. Know what's acceptable & adjust only if necessary.
3.) compression test, using the new special tool makes the job easy.
This thread is mainly about the compression test.
To do a compression test normally, a fair bit of work needs to be done to remove the glow plugs usually, it costs hundreds.
Now it can be done accurately & easily while the injectors are out.
The procedure:
Remove injectors
If the ports are dirty, clean them
I use a 16mm dowel
With strips of rag
Used & port is clean enough for now.
Like so
Drop a sheet/seal in the port, look I can't even see it, but it's there, make sure it's sitting flat
Put some lubricant on the o-rings, engine oil will do, you can see the product I use
Grab your dummy injector, special tool or tools, I use 4 for efficiency, place them in the ports.
Make sure the tool is set square & well clear of the camshafts. Like below.
Not like this, see the camshaft may hit the tool, bad news!
Torque them down to 20nm (injector torque spec is 22nm) 20 is fine for this test.
Connect your compression tester, I have multiple, it's a quality assurance thing, I like to have other units to compare results.
Make sure they are all secured & everything is clear of any turning parts, eg; camshafts & crank.
Record readings.
Swap compression testers around if you like a second or 3rd opinion, it only takes an extra minute.
Once your happy, remove injector clamps, remove special tool, don't forget to pick up the sheets/seals if they did not stay in the bottom of the tool, they do about half the time.
I use a little pick with a bend like below
Make sure you have your 4 sheets/seals before going any further.
Then carry on with the injector replacement job.
Thankx for reading, I hope you like it.
Cheers,
Anth.