Lost Compression, cleaning out carbon, how to tell where the rotor is
05-13-03, 12:33 AM
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Lost Compression, cleaning out carbon, how to tell where the rotor is
Quite awhile ago I posted some questions about a stuck apex seal, well today I was finally able to get the exhaust manifold off and touch all 6 of the apex seals. Of the 6, most spring in and out some beter then others but one is definitely stuck in it's groove! When I had a compression test done earlier, the tape showed 3 full pulses on the rear rotor but only 1 full pulse, a weak second and no third on the front rotor, this is where I found the stuck seal.
I have sprayed the crap out of the chambers with combustion chamber cleaner and plan to rotate the engine every once and awhile to keep the solvent distributed. Since I know which seal is stuck and I can feel it through the exhaust port I will be able to tell if I have freed it up.
So...at the point that the seal is in the middle of the exhaust port how far back do I need to turn the eccentric shaft nut to position this rotor at the bottom and therefore in the pool of solvent. (ie in degrees)? Also now from that point how many degrees do I need to turn the eccentric shaft each time to position another seal at the bottom of the engine?
I have sprayed the crap out of the chambers with combustion chamber cleaner and plan to rotate the engine every once and awhile to keep the solvent distributed. Since I know which seal is stuck and I can feel it through the exhaust port I will be able to tell if I have freed it up.
So...at the point that the seal is in the middle of the exhaust port how far back do I need to turn the eccentric shaft nut to position this rotor at the bottom and therefore in the pool of solvent. (ie in degrees)? Also now from that point how many degrees do I need to turn the eccentric shaft each time to position another seal at the bottom of the engine?
05-13-03, 06:03 PM
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Re: Lost Compression, cleaning out carbon, how to tell where the rotor is
Originally posted by asherwood
Quite awhile ago I posted some questions about a stuck apex seal, well today I was finally able to get the exhaust manifold off and touch all 6 of the apex seals. Of the 6, most spring in and out some beter then others but one is definitely stuck in it's groove! When I had a compression test done earlier, the tape showed 3 full pulses on the rear rotor but only 1 full pulse, a weak second and no third on the front rotor, this is where I found the stuck seal.
I have sprayed the crap out of the chambers with combustion chamber cleaner and plan to rotate the engine every once and awhile to keep the solvent distributed. Since I know which seal is stuck and I can feel it through the exhaust port I will be able to tell if I have freed it up.
So...at the point that the seal is in the middle of the exhaust port how far back do I need to turn the eccentric shaft nut to position this rotor at the bottom and therefore in the pool of solvent. (ie in degrees)? Also now from that point how many degrees do I need to turn the eccentric shaft each time to position another seal at the bottom of the engine?
Quite awhile ago I posted some questions about a stuck apex seal, well today I was finally able to get the exhaust manifold off and touch all 6 of the apex seals. Of the 6, most spring in and out some beter then others but one is definitely stuck in it's groove! When I had a compression test done earlier, the tape showed 3 full pulses on the rear rotor but only 1 full pulse, a weak second and no third on the front rotor, this is where I found the stuck seal.
I have sprayed the crap out of the chambers with combustion chamber cleaner and plan to rotate the engine every once and awhile to keep the solvent distributed. Since I know which seal is stuck and I can feel it through the exhaust port I will be able to tell if I have freed it up.
So...at the point that the seal is in the middle of the exhaust port how far back do I need to turn the eccentric shaft nut to position this rotor at the bottom and therefore in the pool of solvent. (ie in degrees)? Also now from that point how many degrees do I need to turn the eccentric shaft each time to position another seal at the bottom of the engine?
You're not going to have it soaking in a pool of solvent.
You can squirt ATF fluid in the chambers and let all apex seals soak for about a day. That will soften the carbon enough . If you're able to reach the seals, push in the seals after a few squirts to saturate the seals. Be warned though, it will smoke a lot upon start up. You better start it up at night
When I did my rebuild, I soaked the rotors in ATF and the carbon was soft enough for me to just scrape it off easily. So it does work.
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