Low compression in 1 rotor.. What should I do?
 

Hello,

Due to me being out the the country, my car was not started for about 4 months.

I came back and started it and got a compression test done.

One rotor was 100 and the other one was 60 psi.

What should I do ? is it time to get a new engine ? or will a few quick oil changes make a difference ?

Any suggestions would be appreciated..

Oil changes won't help...but a seafoam treatment might.

It could be stuck up ( side seals and apex seals) enough to do that.

What were the values like? If all 3 faces were low that could be the issue

If only 2 are low..then it's an apex seal....

Don't worry..if it is FUBARRED your engine is still under warranty and you will get a new one

lol man.. yeah dude just try to cleant he motor out. there are some threads on how to do it.. also use the mazda zoom cleaner. it has a long flexible tube make it much easier to do the job =] plus u can re use it to clean the motor again.. and the tube can also be reused

Check out my DIY.

it could be just a sticky seal. but ...

seafoam...if not welcome to the new engine club

thanks for the suggestions, Will try seafoam, i hope for the best...

Hi does seafoam treatment worked for you?
i have the similar problem, and changing engine is not an option here ( very expensive in Malaysia )

pls help / update

Get some rotary oil (petrol) additives. they will increase the life of the engine and increase compression.

immediately shop using the engine for now. Do not use it till you at least get the oil additives in the fuel.

Also, make sure you change your oil around 1200 kms.

If you do this, you will surely keep your engine going. I had a similar issue and the engine ran perfectly.

btw, seaform did not make a significant difference. it in fact decreased the compression :) some carbon buildup actually apparently helps the compression..

umm... sure it does........

i would recommend using the advice of people who have been here longer and contributed more to the community

With all due respect, I have had 3 rx8's over the last 3 years and do have experience with a potentially blown experience.

For an rx8 which does not have any engine problems, seafoam works, but use with caution on a potentially weak engine.

I would define a weak engine as one with below 80 compressions (on a digital gauge).

just so that you know, gx1 = glithchX and been through this a couple of times..

It doesn't matter, saying to change the oil every 1200km (around 1000miles) says it all about your experience and credibility.
Also, 3 rx8s in 3 years? there's who's been able to keep one from the beginning!

carbon does not help any sealing of compression in an RX8, the only benefit is what i would call mild sludge for oil seals. all rotary seals are designed to mate to a flat metal surface.

Well, from where I live and the quality of fuel and engine oil you get, you would be amazed to see the oil which comes out even at a 1000.

The recommendations that I gave are based on conserving an engine which is already on its way out and for a country like ours (3rd world) where the average temp is 32oC/ 90 F and they at least worked for me.

The compression of the engine (initial compression ~ 70) on which sea foam was used actually fell (to ~54 why, I dont know) but this is what I saw. You might have a technical explanation for why it could have decreased or increased, but this what I experienced.....

On the other rx8 the compression did improve slightly, but it did help, just not on the old one.