Notices
RX-8 Discussion General discussion about the RX-8 that doesn't fit in one of the specialty forums.

Compression test...

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old 09-11-2008, 04:48 AM
  #1  
Registered
Thread Starter
 
Sleepy-z's Avatar
 
Join Date: May 2008
Location: Virginia
Posts: 285
Likes: 0
Received 4 Likes on 3 Posts
Compression test...

Just a small update for everyone. Sometime down the road dealers will not be doing compression tests. They are setting up a stand for us to be doing them in our recieving department. How they will be handling this in terms of figuring out if the engine is bad prior to us I dont know. They said at work its due to dealerships "costs" in doing them......personally I think someone is complaining about the 5 mins it takes to run the tests. In the end one day if you request a compression test and they say they dont do them, they might not be doing them anymore but for now they still do. Just a heads up.
Old 09-11-2008, 06:59 AM
  #2  
BBQ Smoker Addict
 
BBQdDude's Avatar
 
Join Date: Jan 2008
Location: Ohio
Posts: 286
Likes: 0
Received 0 Likes on 0 Posts
I actually already ran into this at a local authorized dealer. Made an appointment to have one done. Took the car in. Later in the day the service rep called asking why I wanted it. I stated "I just do". He then went into they do not have the tools needed to perform it. They then kept my car four days running computer diagnostics and other tests.

I call another dealer locally and they stated it would not be an issue. While on the phone I had the service rep ask the master mechanic. SR got back on the line and stated the mechanic verified they could run one.



Take care,

Brian
Old 09-11-2008, 08:06 AM
  #3  
Vtak just kicked in yo!!
iTrader: (1)
 
Renesis07's Avatar
 
Join Date: Jun 2007
Location: Lake County IL
Posts: 4,053
Likes: 0
Received 0 Likes on 0 Posts
that's retarded, if you're willing to pay for it then they should do it......
Old 09-11-2008, 10:10 AM
  #4  
Turbos blow!!
 
Cattywampus's Avatar
 
Join Date: Oct 2004
Location: my engine bay
Posts: 1,584
Likes: 0
Received 0 Likes on 0 Posts
I had one done but they said they could not get the rpms high enough. So of course due to the 217rpm turn over my numbers read in the low 7s. Maybe one day I get an accurate reading
Old 09-11-2008, 11:01 AM
  #5  
Huge hole is huge
 
CyberPitz's Avatar
 
Join Date: Feb 2008
Location: Joplin, MO
Posts: 3,191
Likes: 0
Received 1 Like on 1 Post
...Dealership no longer compression testing?! I hardly have words for this. *facepalm*
Old 09-11-2008, 11:22 AM
  #6  
Hit & Run Magnet
iTrader: (3)
 
kersh4w's Avatar
 
Join Date: May 2007
Location: DC Area
Posts: 6,690
Likes: 0
Received 3 Likes on 3 Posts
well thats retarded.
Old 09-11-2008, 03:22 PM
  #7  
Turbo
 
RXheart's Avatar
 
Join Date: Apr 2008
Location: Lost Wages, NV
Posts: 216
Likes: 0
Received 0 Likes on 0 Posts
Oh wow, are they taking away oil changes next ?
Old 09-11-2008, 03:31 PM
  #8  
Registered
Thread Starter
 
Sleepy-z's Avatar
 
Join Date: May 2008
Location: Virginia
Posts: 285
Likes: 0
Received 4 Likes on 3 Posts
Well aparently this all comes down to dealerships coming up with wrong #'s or not bothering giving us the data. Half of the dealers dont give us the info or have #'s that make no sense. Some will still do them though. On a small note we are getting a shipment of 3rd gen brand new rx7 motors that they built for us in japan, we will be doing a few of those also now
Old 09-11-2008, 04:03 PM
  #9  
Turbo
 
RXheart's Avatar
 
Join Date: Apr 2008
Location: Lost Wages, NV
Posts: 216
Likes: 0
Received 0 Likes on 0 Posts
Man I would love to have an FD with a brand new engine !
Old 09-11-2008, 07:38 PM
  #10  
Registered
 
Dale McDonald's Avatar
 
Join Date: Mar 2008
Location: Virginia
Posts: 20
Likes: 0
Received 0 Likes on 0 Posts
Just had my 8 in the dealership for a bad miss. They did a compression test. The front rotor was at 4.8 or 4.9, so they are going to replace the motor. Hope to get it back before the weekend.
Old 09-11-2008, 07:46 PM
  #11  
Rotary Powered Countryboy
 
04RX8man's Avatar
 
Join Date: Feb 2007
Location: Pittsburgh
Posts: 4,811
Received 1 Like on 1 Post
yeah that is sort of done so if somebody goes in with loss of power etc and they think it's the motor they still wont' do one or just if someone walks in and says "I want a compression test"
Old 09-11-2008, 07:54 PM
  #12  
Registered
iTrader: (4)
 
alnielsen's Avatar
 
Join Date: Aug 2004
Location: Buddhist Monastery, High Himalaya Mtns. of Tibet
Posts: 12,255
Received 6 Likes on 6 Posts
My car has been down for 3 1/2 weeks. The replacement engine arrived yesterday. It should be completed tomorrow.
Old 09-11-2008, 10:44 PM
  #13  
Registered
 
Old Rotor's Avatar
 
Join Date: Jul 2004
Location: Northern California
Posts: 2,196
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by Dale McDonald
Just had my 8 in the dealership for a bad miss. They did a compression test. The front rotor was at 4.8 or 4.9, so they are going to replace the motor. Hope to get it back before the weekend.
It more then likely will be about three weeks.....
Old 09-11-2008, 11:05 PM
  #14  
Registered User
 
Jeison's Avatar
 
Join Date: Aug 2007
Location: Saskatoon, Saskatchewan
Posts: 83
Likes: 0
Received 0 Likes on 0 Posts
how much does a dealer compression test run anyways?
Old 09-11-2008, 11:10 PM
  #15  
Out of NYC
iTrader: (1)
 
nycgps's Avatar
 
Join Date: Jun 2005
Location: Planet Earth
Posts: 19,881
Received 32 Likes on 30 Posts
Originally Posted by Jeison
how much does a dealer compression test run anyways?
Usually, they charge you at LEAST an hour of labor.

I just had mine done, I paid for the test. the results came out to be 7.1-7.2 on Rotor #1 @ 289 rpm. its at the "border line". still pass, but I expect my motor to "fail" within a few thousand miles. sucks
Old 09-11-2008, 11:11 PM
  #16  
Out of NYC
iTrader: (1)
 
nycgps's Avatar
 
Join Date: Jun 2005
Location: Planet Earth
Posts: 19,881
Received 32 Likes on 30 Posts
Originally Posted by alnielsen
My car has been down for 3 1/2 weeks. The replacement engine arrived yesterday. It should be completed tomorrow.
are you on your #3 or #4 engine ? what the hell ?
Old 09-11-2008, 11:22 PM
  #17  
Freely Radical
iTrader: (1)
 
RotoRocket's Avatar
 
Join Date: Oct 2005
Posts: 1,912
Received 9 Likes on 7 Posts
Originally Posted by nycgps
Usually, they charge you at LEAST an hour of labor.

I just had mine done, I paid for the test. the results came out to be 7.1-7.2 on Rotor #1 @ 289 rpm. its at the "border line". still pass, but I expect my motor to "fail" within a few thousand miles. sucks
Dude, seriously?

Is it that way? I mean, borderline gets worse necessarily?

Sleepy-Z? Comments?
Old 09-11-2008, 11:46 PM
  #18  
Registered
 
Old Rotor's Avatar
 
Join Date: Jul 2004
Location: Northern California
Posts: 2,196
Likes: 0
Received 0 Likes on 0 Posts
I had my compression done by a master mechanic using the Mazda comp tool and had 6.7@240rpm in #1 rotor. In #2 it was 8.2@245rpm. Showed it to my local Mazda dealer and ask for a compression test @ $133. They said if it was low they would run the de-carb procedure "TSB". They said there readings were #1 rotor 8.4(no rpm's given) #2 was 8.8 and it did not need de-carb. My friend master mech said "thats fishy" cause he ran it twice. We all felt Mazda ran the de-carb and just would not admit it was needed. It does feel a little better and now I can run reg 87 gas which I could not before without detonation. How long will this last, only time will tell and I still have three years left on the 8yr-100K warranty.
Old 09-12-2008, 12:30 AM
  #19  
Out of NYC
iTrader: (1)
 
nycgps's Avatar
 
Join Date: Jun 2005
Location: Planet Earth
Posts: 19,881
Received 32 Likes on 30 Posts
The problem is that, they already did the decarb thing on my motor about a month something ago. so that shouldn't be an issue.

7.1@ 288 rpm kind means around 6.7-9 @ 250 rpm. and 6.5 = failed motor.

cost me 99 + tax to do the compression test.

My motor has this "low idle" issue for a while already(AC on max + slow traffic/red light = rpm sometimes dips around 500 rpm then pop back up)

and over the past 5 days my car has stalled the total of "4" times when Im at slow traffic or red light. it just died on its own. one time I restarted it and I just watch the RPM to go down and dead again.

Im going to drive as it is for maybe another 2 weeks or so then Im gonna go in and have them test it again. this is bs, consider the amount of maintenance I did to my car.

old Mazda flash really screwed things up, after so many years damage is already done and no new flash will fix it.

Now I am just going to wait for it to die ...

Last edited by nycgps; 09-12-2008 at 12:32 AM.
Old 09-12-2008, 01:53 AM
  #20  
Turbo
 
RXheart's Avatar
 
Join Date: Apr 2008
Location: Lost Wages, NV
Posts: 216
Likes: 0
Received 0 Likes on 0 Posts
I still don't have my car from the engine replacement and its been a month today, well sort of. I got it back last week and the tech didnt put the brake caliper on right and the brake caliper fell off and broke my brand new konig rim and made it so i couldn't brake. They had to order me a new rim and it still hasn't come in yet.
Old 09-12-2008, 04:34 AM
  #21  
Registered
Thread Starter
 
Sleepy-z's Avatar
 
Join Date: May 2008
Location: Virginia
Posts: 285
Likes: 0
Received 4 Likes on 3 Posts
Yeah I honestly dont know where the "borderline" is for the motors coming in, we cant send any out below 8.0 compression or with a gap of 1.0 between the front/rear(ie front being 8.0 and rear is 9.1 would be a failed motor.
Old 09-12-2008, 05:40 AM
  #22  
I don't buy Kool-Aid
 
DOMINION's Avatar
 
Join Date: Apr 2004
Location: Vegas Baby!
Posts: 8,823
Likes: 0
Received 2 Likes on 2 Posts
This is F**King stupid. Way to go Mazda! so how do you or any Mazda dealer(s) know if your Engine just tooks a **** one day? Lets say you take your car in due to; "loss of power" right, How long is your car going to sit there till they know WTF is wrong with it. Wow...
Great, Now I'm going to buy the Computer from Mazdatrix and do test out of my Garage for $100.00 a pop. Should have that thing paied off in about a month or two
Old 09-12-2008, 06:33 AM
  #23  
Registered
iTrader: (4)
 
alnielsen's Avatar
 
Join Date: Aug 2004
Location: Buddhist Monastery, High Himalaya Mtns. of Tibet
Posts: 12,255
Received 6 Likes on 6 Posts
Q:
Originally Posted by nycgps
are you on your #3 or #4 engine ? what the hell ?
A: #4, #3 had low compression on one lobe and would quit at idle after warmed up. #2 had a coolant leak into the rear rotor. #1 at first wouldn't start when warm, then the exhaust got louder. No noticeable loss of power.
Old 09-12-2008, 07:01 AM
  #24  
FI by Pettit-BHR-Cobb AP
iTrader: (3)
 
Phil's 8's Avatar
 
Join Date: Aug 2004
Location: Sin City, Nevada
Posts: 3,026
Likes: 0
Received 2 Likes on 2 Posts
At least Mazda warrantied yours.............
Old 09-12-2008, 07:19 AM
  #25  
Registered
iTrader: (4)
 
alnielsen's Avatar
 
Join Date: Aug 2004
Location: Buddhist Monastery, High Himalaya Mtns. of Tibet
Posts: 12,255
Received 6 Likes on 6 Posts
Originally Posted by Phil's 8
At least Mazda warrantied yours.............
First of all, I'm not FI. They first requested a log of all my oil changes. They were done at the dealership w/last change 5 mo. & 4500 miles ago. Second they were concerned about my MS Lightweight Flywheel. Nothing more was said about that (and they shouldn't have to begin with). In all, it took a week and a half before they approved the engine replacement under warranty. Another 2 weeks to get an engine. No free loaner car during this period. The car is outside of the original warranty period. I should have the car back today. They had the old engine out yesterday afternoon.

Last edited by alnielsen; 09-12-2008 at 07:21 AM.


You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: Compression test...



All times are GMT -5. The time now is 05:08 PM.