ok heres a little background

i got an engine from a member on this board about 8 months ago
i put MMO in it and turned on two occasions, but that was atleast 6-8 months ago..when we did this it had EXCELLENT compression ... both chambers fired STRONG and flawlessly

last night we are about to start dressing the engine and i deciede to do a compression check real quick so we dont waste our time ..

the front chamber sounds great .. 3 good strong even pulses..
the rear is a diff story
one great pulse
one semi OK one
and one non existant one ...

after putting in atf and flexing the apex seals a bit with a pencil thru the exhaust port we now have two GREAT pulses coming out and one that is still almost non existant ... the pulse that sucks got a tad bit better, but still lacks ...
we soaked it last night and my buddy is going to try to test it again today ..

my question is this ...
is this engine worth putting in? .. cause i figure if we get it started i bet that stuck apex seal will work its way free... i mean the ONLY problem it could be is just sticking as it had great compression months ago, and has not moved ...
we noticed some rust in there, so im hoping we can install it and get it to work its way free....

i just want to know if it will start with one weak pulse, cause if it starts im confident that it will work its way free...

give me your incite PLEASE

thans
=-dustin

 

It will definatly start, even if there's no compression on that rotor entirely you'll still get it to run off the other. It won't run very good until it can free itself and break up the carbon that's locked it in place.

 

oh by the way we were working with the apex seal that is causing the weak pulse, and its fully intact but it is obviously sluggish on returning to its position after flexing it a bit with the pencil

thats why i think by putting it in and actually running it (if it will start) it will be ok

 

thanks man... thats what i wanted to know

 

STATUS UPDATE



after letting the engine soak over night i now have great pulses all around

im the happiest mo fo this forum has on it right now

 

A similar scenario is happening with my dare i say it Jspec. one rotor is great the other has one strong one medium and a zero pulse. The motor is in great shape on the inside you rust from what i can see from the exhaist and intake ports. So is it worth trying to install it or should i bring it back and try and get a replacement?

 

Remove the turbo and manifold and inspect the seals through the exhaust ports, if everything looks good see if any of them are stuck and see if you can free it up.

 

FYI, two stongs and one weak = bad/stuck side seal, not apex seal.

 

ya i removed the turbo and manifold and the weak rotor has two seals which will compress if i push the with my finger but the third is in tact it just seems to be stuck fully compressed. I tried spraying carb cleaning, a little atf, and this stuff called cd-2 oil detergant that the importer told me should work. Still nothing. Im going to soak it over night and see. Where should i position the rotor tip so that the seal has a chance to fully expand over night so im not just letting it soak fully comepressed any way.

 

Ok so i soaked over night in atf as a last ditch effort. Nothing. My seal is still stuck fully compressed. What should i do? I only have a 30day start up an the motor from my importer and i wont have it in the car by then to be able to see if the seal will come back after started. Should i just tell my importer the seal is stuck and has no compression so the car wont start? Or should i roll the dice and hope the seal unsticks when i go to start the motor this summer? I would love to send the motor to rotary resurrection but that is just not an option due to a complete lack of funds.

 

Bring it back

 

So when i bring it back what should i say? I installed it and it wouldn't start. I took a compression test and the front rotor has a stuck/broken seal. I tried to free it up by soaking it in cd-2 like you told me but still nothing. For future purchase i should make sure i get 3 strong pulses from each rotor before buying. Seeing as you can really compression check a cold engine.

 

are you sure its really stuck? the corner might be broken off of the apex, which you wouldnt be able to see by looking into the exhaust port. i'd take it back and get a different engine. the seal is going to be almost totally compressed when its anywhere near the exhaust port anyways, so it might not even be stuck, maybe just compressed during the only phase in which you can see it via the exhaust...

 

Exactly what I was thinking, a sluggish apex would give you one good pulse, two bad.

 

That sounds like a good idea to me. you dropped what, 1500-2000, for a jspec motor that has a 30 day startup warranty, hell yeah take it back and just say it doesn't run, you installed it, tested it, soaked it, tested it, pulled it, and returned it. get your money back or pull around back so they can drop another in the back of your truck and try all over again

 

Ya thats what im going to wind up doing. Ill keep you guys updated.

 

Ok i checked the other 13bts they had and both where even worse than this one. So Now i need to find an s5 tii engine somehwere to buy.