cdrad51

You guys probably remember my thread couple of weeks ago where I said I blew an apex seal in the rear rotor. The symptoms that made me arrive at that conclusion are a lumpy idle, funny exhaust sound, reduced power, 1 big whoosh and 2 small ones when doing ghetto test, 70 psi on the best side of that rotor, oil and fumes coming out of the oil filler neck.

But now I'm not so sure, because when I do step on it, even though it has less power, it doesn't behave like a one rotor engine. Take today for example, I got out of a parking lot and into the street. I had a fire truck on my left side. I wanted to go on the left lane, so I floored it in 1st, took it to 7k rpm, changed fast to 2nd, and had a loud chirp of the tires. And they are 215's. That's not right with a one blown rotor is it? Now definitely something broke, maybe the oil ring seals, but maybe not the apex seals? the ghetto compression test is the only thing that doesn't make sense then.

Obviously the truth will surface once I remove the engine and get it torn apart. But that might not happen for awhile. Anybody has any input on what could be the problem?

shm21284

why dont you go to autozone, use their "free rent a tool" service, and compression check both rotors. Remember to remove the valve at the end of the compression meter so you can get an accurate reading of all 3 sides of the rotor. Its free, and its the right way to do it, so why not.

680RWHP12A

why hasnt your motor builder looked at it? its easy enough for him to check it and since your a valued customer he should provide the service free of charge!!

cdrad51

Oh I have a compression tester, but didn't think about removing the valve to get all three sides. Gotta try that.

cdrad51

He has offered to tear it apart. But because the car is my daily driver and only car, I cannot just remove the engine. I'm trying to get a cheap replacement engine so I can remove the other one and give it to him to diagnose/repair and take his time.

Siraniko

iTrader: (13)

I say "JUNK IT" and buy the TII Jspec motor from Rob. then I will install it for ya. But you have to buy lots of heine and bbq meat

mar3

iTrader: (8)

Your builder can at least take you into the shop for a diagnosis with the proper equipment so you know what it is you're dealing with EXACTLY....

Brianhsval

Let YOUR builder look at it for you since he is obviously such a nice guy and will make time just for you.

ArmySoldier

I was running over 70 mph with 1 rotor and it was firing on only 1 spark plug.... so its possible your car will still run high end with some power.

maxcooper

If you just crack a seal but it is all or mostly all there still, it will idle funny but still make decent power at higher revs.

-Max

Siraniko

iTrader: (13)

But not at full potential...

cdrad51

I see. Maybe that's what it is. I mean, I've gone up to 90 mph and the only reason I didn't go higher is because I was afraid I would pass out from the amount of fumes coming into the interior of the car

But yeah, eventually the builder will get it for a teardown, and then we'll know for sure what it was. I just wanted to get an explanation of how is the engine performing as it is with those symptoms.

680RWHP12A

did you let your motorbuilder check your car out yet? what did he say?
you dont need to take the motor out to find out whats wrong with it

cdrad51

No, not yet. I just bought an engine on Ebay http://cgi.ebay.com/ebaymotors/ws/eB...RK%3AMEWA%3AIT so I'm gonna swap it and give the blown one to the builder for him to have fun with it.

680RWHP12A

your motor isnt blown!!
blown motors dont go fast

cdrad51

Something's wrong in the rear rotor for sure though. I got 70 psi on the best of the 3 chambers. If not blown apex seal, what else can blow that will make it loose pressure? I guess that was my original question.

kenn_chan

could have lost arch on the apex seal springs, this would cause low compression test, would affect the upper RPM running but not as bad as a blown seal.

kenn

cdrad51

I can dig that. I wonder however how does exhaust going into the oil system and out the oil filler cap ties into that.

Hades12

Maybe the Front is strong enought to take up the slack.

d0 Luck

cdrad51, u still running the crankcase vent back to your intake mani?? or did u have the oil cap tapped instead?

cdrad51

both.

mar3

iTrader: (8)

Wow....that's a hell of deal if it's all it's calimed to be...and $415 shipped to your door? Excellent buy!

cdrad51

Thx. I'm actually picking it up tomorrow, so no shipping costs

I thought it was a deal too, as I snip it the last 10 seconds of the auction. Hopefully it is all it's claiming to be.