85' Mazda RX-7 Question

crazygsps · Postby **crazygsps** » Mon May 23, 2011 9:14

mazda services just did a compression check and i guess it failed but its leaking oil like crazy.

Postby **RX-7 Chris** » Mon May 23, 2011 9:14

Is it still running? You may have a stuck seal.

crazygsps · Postby **crazygsps** » Mon May 23, 2011 9:14

No its not running, and if you do get it to run you better not turn it off because then it wont start again...

D Walker · Postby **D Walker** » Mon May 23, 2011 9:14

Yeah stuck seals are a PITA on the older engines, had many a "blown engine" come back to life after a night of Marvel Mystery oil and ATF.

It is beyond rare for an older, nearly stock engine to lose actually lose an apex seal.

How many miles does the car have?
What was the failure mode? IE did you just walk out one morning and it would not start, were you on the highway and it made funny noises and stopped running, were you jetting your 200shot nitrous kit and it started belching black smoke, did it just sorta lose power over time and get harder to start or was it not running when you purchased it? Iam sure you have covered some of this, but i would just like some clarification.

Old engines do wear out, and when the O-rings for the oil control rings get hard as glass they do a poor job of keeping oil where it belongs.

EDIT- Also if you want to talk to me about the engine and the symptoms etc feel free to call me at 720-212-5838, if I do not answer I will call you back, no need to leave a message I will never listen to

crazygsps · Postby **crazygsps** » Mon May 23, 2011 9:14

It has about 150,000 miles or so on it. Well everyonce in awhile it was very hard to start up but then after getting it started ran like a dream, then everyonce if you stopped somewhere and came back out it just wouldnt start. No noises, no nitrous kit, it always has power,

crazygsps · Postby **crazygsps** » Mon May 23, 2011 9:14

It is all original engine nothing changed to it

Postby **RX-7 Chris** » Mon May 23, 2011 9:14

that isn't all that many miles for a stock first gen motor. You should get 220k+ out of it.

For the oil leak, look at the oil filter pedistal, oil pan, OMP, oil cooler, and oil cooler lines. I would bet one or all of those are leaking.

I would start with pulling the L1 spark plug and cranking the motor, you should hear 3 woosh sounds. Than do the same thing to the L2. That would at least give you an idea if you have compression on all rotor faces.

I assume your car is a GSL-SE if it has a 13B?

D Walker · Postby **D Walker** » Mon May 23, 2011 9:14

so to get this straight- you HAVE power, its just hard to start?

Hard to start cold or hot?

Leaking oil or blowing it out the tailpipe?

Sounds like a bad diagnosis, but need more info!

Postby **RX-7 Chris** » Mon May 23, 2011 9:14

I was looking through your thread again and you said it was a carb car so that would mean it has a 12A not a 13B.

Can you take pics of the motor? that would help a bunch.

Postby **RX-7 Chris** » Mon May 23, 2011 9:14

PM'd you

85' Mazda RX-7 Question

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