Needing knowledge on "Excessive blow by..."
#1
Needing knowledge on "Excessive blow by..."
Hi all! I have a used 2005 Mazda RX8 with 36,000. Just bought it in Sept of 2011. My dealership is, let's just say, not great,(Just look at the old air-filter, they said they replaced a month ago) NOT!! So I have taken it to a mechanic that I've used for years and they do know the RX8 well. I love this car! I just recently had the oil changed, 3 weeks ago to be exact, with 5w20 and the oil was not overfilled. The oil is between the marks on the dipstick.
And just after 3 weeks,I'm getting significant oil in the airbox and under the airbox in the tray. (See pics)
I've heard to check MAF, massive air flow, and SSV? I am new to this type
of engine, so needing to know what to check first? Little things, valves sticking maybe? Oil sending unit?
"Trying to save your pocket money and your engine"=PRICELESS
Any help would be greatly appreciated!
Thanks in advance!
LeadFootLady
And just after 3 weeks,I'm getting significant oil in the airbox and under the airbox in the tray. (See pics)
I've heard to check MAF, massive air flow, and SSV? I am new to this type
of engine, so needing to know what to check first? Little things, valves sticking maybe? Oil sending unit?
"Trying to save your pocket money and your engine"=PRICELESS
Any help would be greatly appreciated!
Thanks in advance!
LeadFootLady
The following users liked this post:
Dori Ninja (04-13-2023)
#4
Thanks! This really helps me out!
#5
Could there be something else clogged?
Side note: No fuel screen in the RX8, correct?
Last side note: Only 91 Octane the manual says. I used 93, is this going to
be bad in the short or long term?
I also just changed my "in cabin" filters. So with a new air filter, I hate knowing that it will just get oiled until I can find and resolve the problem.
Thanks soo much for the reply! Sometimes it can be the simplest thing.
#6
search guy--also assured that some oil is getting into the vacuum tube that leads back to the intake.
The only time we have seen bad blowby is when we track and sustained high rpm.
You do realize we have kinda a dry sump system in this engine.
The only time we have seen bad blowby is when we track and sustained high rpm.
You do realize we have kinda a dry sump system in this engine.
#7
#9
This is actually a Tech Garage thread. Not sure why you would post in the Engine Tuning forum? Please try to learn the website forum organization and post your questions in the proper area.
Excessive blow-by is a symptom of low compression. A proper compression test will tell the tale.
Excessive blow-by is a symptom of low compression. A proper compression test will tell the tale.
#11
I'm sorry I posted in the wrong area. I am new to the site. I see now where this post should have been put. And yes, I'm still learning things about the rotary engine. Heck, I'm trying here. I just purchased it in Sept 2011. (See I thought that when I go to shut the car off, and graceful get the rpm's up to 4000 and then turn the ignition off, that may be why oil was in my air box and vacuum tube)
Always learning something new here! Thanks for all of your help.
Always learning something new here! Thanks for all of your help.
#12
#13
You wouldn't see oil smoke out of the tailpipe in most failure scenarios, rotaries don't make that easy.
Also, a 7 year old post? really?
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