Last post on Oct 18, 2006 at 9:17 AM
You are in the Mazda RX-8
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Mazda RX-8, Coupe
#841 of 1414 engine detonation.
May 20, 2005 (1:01 pm)
I have had my AT RX-8 for about a year and a half now (2004 model). I recently took it in for service because of a loud crack noise (like a firecracker) that occurred intermittently when I got it up to aout 5000 RPMs. It would also rapidly lose power until I took my foot off the acclerator and drove at lower RPMs.
The diagnosis was that the seals were not working properly, allowing gasoline to leak into other engine areas and "detonate." Mazda is now replacing the entire engine for me for free.
My car only has 50,000 miles and I'm already getting a new engine for it. Has anyone else had this problem? I did a serach and saw some info on it, but didn't see anyone actually having the problem described.
They asked what octane gasoline I was using and I assured them that the lowest was 92 octane and usually was 93. They also asked if I regularly ran my engine at high RPMs as the RX8 needs it to reduce carbon build up.
I'm worried aout this happening again at 100,000 so any info. is appreciated.
P.S. I absolutely love the car so this is really not a rant so much as a "What can I expect?" type post.
#842 of 1414 oil grade changes
May 20, 2005 (4:44 pm)
originally posted on maintenance without reply
not really a problem per say but could be if I start using the SM GF4
Manual calls for SAE 5W-20 API SL (GF3)
June 2004 a better SAE 5W-20 API SM (GF4) was introduced
Does anyone know if using the newer SM GF4 will effect warranty?
Any help on this "problem"?
#843 of 1414 Re: engine detonation. [smilinbrax]
May 22, 2005 (5:48 am)
I have had a similar problem with only 22K on my RX8 automatic. The dealership says they cannot reproduce the problem and ignores my requests. I am ready to pay for a dyno check to reproduce the problem. If you have anything in writing from Mazda this would help my case my fear is that I will have to live with this problem. The problem usually happens when the engine is hot and it starts as a pinging noise and when I accelerate it becomes very loud and vibrates the car.
#845 of 1414 Re: engine detonation. [smilinbrax]
May 22, 2005 (6:54 am)
#846 of 1414 GF4 supercedes all GF3 requirements
May 22, 2005 (9:01 am)
so yes, GF4 is perfectly fine for the RX-8
#847 of 1414 Re: Mazda RX-8 Owners: Problems & Solutions [awyrwas]
May 23, 2005 (7:17 pm)
I live in CO and have been running snow tires, Hankook Ice Bear W300 18" 40/225, sold by Discount Tire work great around $165 each.
May 24, 2005 (5:05 pm)
Any chance to put 16" in the winter. 15 I admit probably disc brake will not work out. Is anybody try to put 16 and it doesn't work?
#849 of 1414 Re: engine detonation. [richr]
May 27, 2005 (9:57 pm)
Rich, I now have 24k on my 6-sp 8...bought in Oct 2003 and have had the problem off and on since beginning. Live in Denver and haven't found a dealership who will acknowledge the problem..and I've been to 5 of them. They can't (or won't) take the time to replicate the problem, and have simply said "Come by when it's doing that." Uh, yeah, that'll work when I'm racing to airport for a flight that leaves in 30 min!
Typically happens when warmer, but I've had it happen on colder days as well. Same symptoms as you said: begin to feel loss of power underfoot and a slightly different tenor to engine sound, give it gas...nothing, downshift...nothing...starts knocking and clattering and becomes anemic...can't get out of my own way. I've told dealers it's like I'm suddenly driving under water and it sounds like something's going to blow.
VERY frustrating as you note, and embarrassing. I love the car, but would consider selling it BUT who would buy it if it did that on their test drive. Trading it in of course would result in a financial bath. So basically stuck with a car that would be a dream for years to come...if it only ran right and up to par. I'm worried either the engine's going to completely self destruct (and they'll make it my fault and $$$) or Mazda has decided this condition is simply the owners' to bear for the early generation cars. At this point I'd pay for someone to fix what's wrong...but dealers either act ignorant of problem, or say it's up to Mazda North America to develop a fix. A year and a half later the latter hasn't come close to happening.
What city are you in? I'm interested in calling large dealerships in other parts of the country to get their take and see if they'll at least acknowledge the problem...perhaps that would carry some sway with the inept dealerships here.
Would greatly appreciate any solutions based experiences from other owners having this same problem and how they got it resolved. Or at least, knowing I'm not alone here in Denver with a terminal performance problem that dealerships simply shrug their shoulders at. My gut says Honda dealers wouldn't do that for an S2000.
May 28, 2005 (7:11 am)
email me your vin number....I want to check something for you.