Methanoxide

tested at Mazda.

Rotor 1: 6.5, 6.3, 6.7 @ 291 RPM
Rotor 2: 6.5, 6.2, 6.4 @ 293 RPM
They've listed as a pass??

When I look at the charts, I come to the conclusion it's a terrible fail... Am I doing it wrong?
Looking for some feedback before I bring this chart into them.

bse50

They're doing it wrong.

Methanoxide

Excuse my ignorance, but they're doing what wrong? The test?

Methanoxide

Is what I've plotted in the chart correct?

bse50

They didn't normalize the results as they should. You're completely right and should show them the chart.
I don't know at what altitude you live though, too lazy to search that

Methanoxide

My Bad, from all the other posts I should have known to include that.
Altitude: 195 m (640 ft)

Still bad, isn't it? ugh....

bse50

It still looks bad, go get that reman engine!

Methanoxide

Thanks for your help, much appreciated!

Now I have to go through de-carb and then vacuum test and they submit to Mazda to see if it gets replaced...

gwilliams6

Mazda wont replace engine unless it tesst 6.0 or lower (or adjusted number from 6.0 kcps at sea level and 250 rpm) . Mazda considers 6.0 and higher as in the acceptable range. (I have this from my Mazda service manager, who is a honest straight shooter).

bse50

Mazda says otherwise. 680kpa@250rpm. Read the service manual!

paimon.soror

iTrader: (15)

dont argue with him or hes gunna tell us about his 7 different rotaries he owned in the last 40 years and the compression values on each one

Methanoxide

It's funny because my service manager said the same thing!
But I quickly pointed out that it's for 250rpm, mine tested @ 290's. Surely once corrected to 250 I would produce well below 6.0. (I don't do math...)

gwilliams6

Hmmm two Mazda service managers, one in Canada, one in the U.S. said the same thing, I wonder how that happened bse50 ! Hey if the OP can get them to agree to replace the engine fine, it just wouldn't happen at my Mazda dealership with compression numbers above 6.0 kps at 250rpm and sea level.

BTW paimon soror, so kind of you to remember about my cars.

bse50

I don't know. Words mean nothing when there's something else written on paper. At least here even the latest service manual says 680kpa@250rpms.

If Mazda said otherwise then it's up to the techs\managers to show you where that is written.

gwilliams6

What year service manual are you quoting? My service manager says his new service manual says 6.0 at 250rpm. This mazda dealership is one of the biggest on the east coast with multiple dealerships, and they won't do an engine replacement if the compression numbers are 6.0 or higher. hasn't happened, and they won't do it. So if the OP can get it done with his numbers, great Just won't happen at my dealership,end of story

Methanoxide

I think it's true, they raised the minimum. Dirty move if you ask me.

Just to update:
Decarb didn't change numbers, failed vacuum test.
Submitted receipts for past 2 years and received approval.
No engines available in north america right now, so we don't know when it will happen.

I have to pay for consumables, which is a drag because I just had an oil change and had all fluids replaced beginning of summer... ugh...
Oh well, good time to check clutch and replace my rattling clutch release bearing!

Any other recommendations while the engine is out?
I already changed all the hoses, water pump and thermostat housing.

Thanks for all your help guys!