I have a piston compression tester. I am not sure which to do first.

1987 turbo 2 doesn't start.

1- if one of the apex seals are stuck wont the compression test look like I have a blown seal?

2- if I use oil and squirt it into the bottom rear and front housing to try to free up any stuck seals prior to doing the compression test, when I do the compression test after trying to free up the seals, wont the left over oil clog the inlet for the compression valve?

What do I do first and how?

Do I Check compression first then oil the seals with egi fuse out?

OR oil the seals with egi fuse out then check compression??

Also how much oil should I inject into the bottom plugs?

Anyone please help me.

 

Step #1. Search.

 

did you just make another thread asking when you allready have one going on the subject?


anyways sorry, never done a compression test, when my seals went it was pretty obvious

 

well, check the compression first as you may simply have low compression on all faces as oppose to one stuck seal. And seeign as how you have to pull the plugs to oil it anyways - you may as well stick the gauge on there and see what you've got.

If things look good enough to start, then give it a try.

 

what do you mean '1 of the apex seals is stuck' ?

 

I assume you have checked for fuel, spark, unflooded, etc?

Yes. If you have a stuck apex seal, one rotor will lose compression on two faces. Two suck seals on one rotor will result in almost no compression.

No. Oil will try to raise compression if it is possible. You may need to use something nastier if you truly have a stuck seal. This can be due to corrosion or carbon. If it's corrosion, PB Blaster or other penetrating oil applied directly to the seals (though exhaust ports) can sometimes help. If it is carbon, then you will need lots of carb cleaner. If the seals are corroded, then you won't have much life left in that engine even if you do free them.

Doesn't matter. Low compression is low compression. A compression test will not prove that it is due to stuck seals or a blown engine.

About an ounce to start.