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 Old 04-05-2012, 01:26 PM   #321
 
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30,000 km

195.190.190.195

I also have oil going into my IM.....
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 Old 04-05-2012, 01:31 PM   #322
 
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Originally Posted by Snotrocket View Post
30,000 km

195.190.190.195

I also have oil going into my IM.....
How much? Light oil? That's normal from the valvecover vent.

If you see a whole lot of oil in your intake tract (like in my build thread, first picture), it might be indicative of a problem.

You can have good compression results but a bad leakdown.
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 Old 04-05-2012, 01:47 PM   #323
 
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Originally Posted by BlueStreak View Post
How much? Light oil? That's normal from the valvecover vent.

If you see a whole lot of oil in your intake tract (like in my build thread, first picture), it might be indicative of a problem.

You can have good compression results but a bad leakdown.
My boost tube looked like yours on the cold side of the TMIC

Originally Posted by BlueStreak View Post
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 Old 04-05-2012, 02:49 PM   #324
 
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Hmmm.

Any oil consumption?

EDIT: It could also be a bad crankcase PCV.


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 Old 04-05-2012, 05:33 PM   #325
 
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i just put a new PCV valve and OCC in this weekend.
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 Old 04-05-2012, 07:33 PM   #326
 
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you're a real man when yours looks like this:

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 Old 04-05-2012, 07:44 PM   #327
 
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That's more or less what mine looked like right before I got my OCC...
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 Old 04-05-2012, 08:56 PM   #328
 
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Originally Posted by aaronc7 View Post
you're a real man when yours looks like this...
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 Old 04-16-2012, 07:50 AM   #329
 
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8.5 98,000 miles. Just an intake tip and race pipe. I took the compression test while I was cleaning out the egr valve. Not real happy about the results but it is what it is. I wonder if leaving in the Balance shaft starves the middle cylinders over time.

1-195
2-180
3-185
4-208

Have run rotella 5-40 since about 10,000 miles and change every 3 to 4 thousand and have a spin on conversion. I know the valves must be filthy and plan on doing the self clean soon which I hope will help.
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 Old 05-05-2012, 05:14 AM   #330
 
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First of all: Awesome thread. Thank-you, thank-you, thank-you.

2007 MS3, GT25 turbo is the only engine mod. 100,000 miles.

Recently had TSB 01-004/10 done (valve cover) because oil was burning like crazy. Lots of oil in the intake tract like Snotrocket (per my mechanic, I'm not as handy as the rest of you). Did a valve/engine flush, replaced plugs (totally fouled) as well.

Added 6 fresh quarts of 5w 40 synthetic.....and 500 miles later 75% of it was gone. Not a drip on the garage floor, and the remaining oil was BLACK.

Unbelievable.

Compression Test Results:

CYL #1 - 180
CYL #2 - 170
CYL #3 - 160
CYL #4 - 180

Leakdown Test Results:

CYL #1 - 18%
CYL #2 - 7%
CYL #3 - 14%
CYL #4 - 18%

Mechanic cited "very little leakage past the valves, air is coming out the valve cover breather pipe by getting past the piston rings and into the crank case."

I'm no mechanic, but to me, that says engine rebuild b/c the rings are fried.

The part that gets me is that the compression / leak test dont seem THAT bad given what else I've seen on the thread....but the dip stick doesn't lie; I think this engine is pooched.

Also, I have no idea if my guy did the compression test warm or cold....and not sure that matters from what the rest of you have said since it's the relative compression that is more relevant.

Thanks again for the awesome thread, if you can share any more wisdom, please do!

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 Old 05-05-2012, 08:30 AM   #331
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Update.
My compression results have gotten...
...better?!?
I had my wife do the cranking this time so I could watch the gauge.
180-180-175-190.
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 Old 05-05-2012, 08:45 AM   #332
 
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1-182
2-182
3-182
4-185

2k on built motor. Wiseco pistons.
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 Old 05-05-2012, 12:29 PM   #333
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Originally Posted by WaterlooDrew View Post
First of all: Awesome thread. Thank-you, thank-you, thank-you.

2007 MS3, GT25 turbo is the only engine mod. 100,000 miles.

Recently had TSB 01-004/10 done (valve cover) because oil was burning like crazy. Lots of oil in the intake tract like Snotrocket (per my mechanic, I'm not as handy as the rest of you). Did a valve/engine flush, replaced plugs (totally fouled) as well.

Added 6 fresh quarts of 5w 40 synthetic.....and 500 miles later 75% of it was gone. Not a drip on the garage floor, and the remaining oil was BLACK.

Unbelievable.

Compression Test Results:

CYL #1 - 180
CYL #2 - 170
CYL #3 - 160
CYL #4 - 180

Leakdown Test Results:

CYL #1 - 18%
CYL #2 - 7%
CYL #3 - 14%
CYL #4 - 18%

Mechanic cited "very little leakage past the valves, air is coming out the valve cover breather pipe by getting past the piston rings and into the crank case."

I'm no mechanic, but to me, that says engine rebuild b/c the rings are fried.

The part that gets me is that the compression / leak test dont seem THAT bad given what else I've seen on the thread....but the dip stick doesn't lie; I think this engine is pooched.

Also, I have no idea if my guy did the compression test warm or cold....and not sure that matters from what the rest of you have said since it's the relative compression that is more relevant.

Thanks again for the awesome thread, if you can share any more wisdom, please do!
How often did you change the oil and what oil did you use?

A lot of these low compression numbers coming from the bottom end could very well be the result of fuel washing oil off cylinder walls ... oil thinning ... carbon seized rings. It's a dirty motor.
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 Old 05-06-2012, 04:15 AM   #334
 
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Bought the car lightly used (2000 miles) and have changed the oil at regular intervals since then. Used 5w 30 until about 80k, then switched to 5w 40, always synthetic.

Anyone have a good motor for sale?

Last edited by WaterlooDrew; 05-06-2012 at 06:30 AM.
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 Old 05-06-2012, 07:33 PM   #335
 
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8k kms, waited for car to cool down so i could do the DP

all 4 cylinders around 180
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 Old 05-08-2012, 10:53 AM   #336
 
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checked my compression 2 weeks ago.

#1 ~185
#2 ~185
#3 ~185
#4 ~190

I'm about to hit 66K on the motor, been running the mods in my sig for ~2 years. I've never seen oil in my TMIC or boost tubes or throttle body. motor likes Rotella T6.
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 Old 05-09-2012, 03:49 PM   #337
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Originally Posted by WaterlooDrew View Post
Anyone have a good motor for sale?
IMHO, i don't think your motor is anywhere near needing to be replaced. Use a catch can, replace the PCV valve, and drive the car
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 Old 05-09-2012, 04:40 PM   #338
 
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Originally Posted by djuosnteisn View Post
IMHO, i don't think your motor is anywhere near needing to be replaced. Use a catch can, replace the PCV valve, and drive the car
Thanks man, I didn't think it was that bad. The oil consumption did slow down dramatically after a little more driving with the new PCV....mechanic did say it could take time for the flush chemicals to do their job.

It starts, drives, sounds fine and has good power.
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 Old 05-13-2012, 04:12 PM   #339
 
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Did my compression test today out of curiosity. The car is a '11 with about 28500 miles on it.
Cyl 1 - 191
Cyl 2 - 191
Cyl 3 - 190
Cyl 4 - 190
Been running on a modified stage 1 map
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 Old 05-30-2012, 01:39 PM   #340
 
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Decided to do a compression test yesterday on my 2006 Mazdaspeed 6; I'm currently at 102K. Results are as follow:

Cyl 1-180
Cyl 2-180
Cyl 3-180
Cyl 4-180
Currently on Dizzy 50/50 E-mix tune, and I've been using Rotella T6 for past 40k miles.
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 Old 05-30-2012, 03:00 PM   #341
 
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Just check my compression today. 61k miles

1: 161
2: 159
3:150
4:160

2007 speed3
I bought the car used with 45K, previous owner had intake, dp, no ap, no fp internals, and ran royal purple.

I bought the car after it was stocked out, got new turbo from Mazda, then I put on intake, ap, tip, fmic, internals, catted dp, rotella t6, 2 occ because there was oil in the intake.
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 Old 06-03-2012, 04:30 PM   #342
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I might do a leakdown on #3 and one of the other "good" cyls for comparison.






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 Old 06-04-2012, 06:58 PM   #343
 
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71500 miles tests 1 & 2 were done about a week before test 3.

test #1
cyl 1: 182
cyl 2: 182
cyl 3: 165
cyl 4: 185

test #2
cyl 1: 190
cyl 2: 185
cyl 3: 172
cyl 4: 190

test #3
1 - 185
2 - 182
3 - 170
4 - 187

low comp + leaky leak down = inj seals?
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 Old 06-07-2012, 08:02 AM   #344
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Did a compression test on the 6 for kicks:

1: 165
2: 156
3: 153
4: 180

96k miles and this car came with a BUNCH of aftermarket parts on it, but no fuel pump internals. I'm betting it wasn't ever tuned, either. Good thing I planned on building!
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 Old 06-07-2012, 08:04 AM   #345
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Originally Posted by phate View Post
Did a compression test on the 6 for kicks:

1: 165
2: 156
3: 153
4: 180

96k miles and this car came with a BUNCH of aftermarket parts on it, but no fuel pump internals. I'm betting it wasn't ever tuned, either. Good thing I planned on building!
Cranked until the needle stopped rising? Also does it have lots of blowby (oil in the intake)?
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 Old 06-07-2012, 08:09 AM   #346
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Originally Posted by Lex View Post
Cranked until the needle stopped rising? Also does it have lots of blowby (oil in the intake)?
Yeah, cranked until she stopped. Did it twice on each cylinder and came up with no more than ~2psi difference each time.

It has a little bit of oil residue in the intake system, but nothing terrible. Piston height checks out, as well. Figured I should check while I had the plugs out. The car runs well, but I'm not going to risk pushing this engine. It's seen a max of ~3psi of boost since I got it. It's been SOOOOO hard to restrain myself!!!
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 Old 06-07-2012, 08:17 AM   #347
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congrats on the new 6 phate!

I need to resume my search for one.
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 Old 07-05-2012, 10:12 AM   #348
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Just did another test 65k km or 40k miles.

Cyl 1: 195
Cyl 2: 195
Cyl 3: 185
Cyl 4: 195

These seems to be a slight increase in compression - perhaps carbon buildup on the rings. Cyl 3 has always been the lowest and continues to be so - been checking compression for the last 20k miles on the motor. Vacuum readings at idle have always been the same.
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 Old 07-05-2012, 11:13 AM   #349
 
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Hey Lex, do you know of anywhere local that I can get a leakdown test performed?
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 Old 07-05-2012, 11:30 AM   #350
 
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I did a Compression test yesterday on my MS6
1- 190
2- 190
3- 190
4 - 195

It was like 85 degrees out. Car has 70k miles
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 Old 07-05-2012, 11:55 AM   #351
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Originally Posted by theurgy View Post
Hey Lex, do you know of anywhere local that I can get a leakdown test performed?
Any mechanic shop will do it. It's a pretty basic test and the tester is not too expensive as long as you have an air compressor. I work with a local shop that is pretty good - send me a PM and I get you his info.
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 Old 07-05-2012, 04:55 PM   #352
 
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I really need to get around to checking mine again... I still haven't confirmed with a second gauge that I'm not running ~130 psi in all cylinders.
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 Old 07-05-2012, 05:40 PM   #353
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Mine has also gotten. Better.
190-180-180-190.
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 Old 07-05-2012, 05:46 PM   #354
 
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I did a test about 3 weeks back

I'm sitting at ~169 in cyl. 1-3, cyl. 4 is ~166

I'm satisfied!
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 Old 07-05-2012, 07:13 PM   #355
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Originally Posted by Nliiitend1 View Post
I really need to get around to checking mine again... I still haven't confirmed with a second gauge that I'm not running ~130 psi in all cylinders.
There is no way that's possible. Lol

ESP if they are all that even.


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 Old 07-05-2012, 08:05 PM   #356
 
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...hence my sloth with respect to checking it again.
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 Old 07-06-2012, 11:11 AM   #357
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Tappin
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 Old 07-23-2012, 01:14 PM   #358
 
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i have a nasty knock when i accelerate( i dont drive it anymore) but i had it towed to mazda and they dont even open em up to diagnose. they do not perform deep engine work. the tech said it sounded like a spun bearing and compression was; Cyl 1 180 Cyl 2 175 Cyl 3 180 and Cyl 4 was 140 im taking her to another shop wed. to further inspect. this guy will actually let me help. my vvt is bad also.
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 Old 07-23-2012, 01:35 PM   #359
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That sucks.
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 Old 07-31-2012, 09:33 AM   #360
 
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Just did a test, my car is still young, 19k
180 across the board.
50/50 mix since 5k, tuned by @phate
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