Jump to content
SAU Community

Recommended Posts

hey guys i just got my M35 stag back from the mechanic after a service and i had a compression test done i was just wondering what results i should get normally, i got 125 120 130 110 95 120,

Also my check engin light is on now how do i reset it, last time it did this i went away later that weekend after a heap of drives,

also anyone know why my 4WD light is comming on intermiditly

thanks

Matt

Link to comment
https://www.sau.com.au/forums/topic/233864-m35-compression-test/
Share on other sites

hey guys i just got my M35 stag back from the mechanic after a service and i had a compression test done i was just wondering what results i should get normally, i got 125 120 130 110 95 120,

Also my check engin light is on now how do i reset it, last time it did this i went away later that weekend after a heap of drives,

also anyone know why my 4WD light is comming on intermiditly

thanks

Matt

Not too sure what the figures on the compression test should, but assuming yours is turbocharged, you've got to allow for the fact that it will be lower than the readings for a non-turbo Stagea. In saying that though, that 95 does seem a bit low, and that 110 is a bit suspect too. It could be a number of things, and a blown head gasket is amongst them, at the very least. Blown pistons, rings or conrod is amongst the worst (and probably most expensive).

Not too sure about the "Check Engine" and "4WD" lights though, sorry.

A proper leakdown test needs to be your next move to see what is dropping the compression. Most difference acceptable (in any engine) is 10% between cylinders, and yours seem to be a long way from that.

As for the 4WD light, without more info it is gonna be hard for anyone to make any suggestions other than the obvious ones about checking fluid quality/levels and getting the system properly bled of all air.

The results of that compression test would worry me before all else though.

  • 7 years later...

digging the old thread.

just did compression test as common check for my M35.

i got dry test result:

1 140

3 130

5 140

2 140

4 135

6 130

any idea about the result? it is a bit low? i am not good at reading data... LOL :woot::woot::woot:

Edited by YangLIU

digging the old thread.

just did compression test as common check for my M35.

i got dry test result:

1 140

3 130

5 140

2 140

4 135

6 130

any idea about the result? it is a bit low? i am not good at reading data... LOL :woot::woot::woot:

Good enough. If you are curious do a wet test and if you are still worried do a leak down test but within 10% is OK

Good enough. If you are curious do a wet test and if you are still worried do a leak down test but within 10% is OK

tuner just do the compression test for common check because i got new plugs and coils for my car. not curious if the dry test is good enough ;)

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Hi, is the HKS  Tower Bar still available ? negotiable ? 🤔
    • From there, it is really just test and assemble. Plug the adapter cables from the unit into the back of the screen, then the other side to the car harness. Don't forget all the other plugs too! Run the cables behind the unit and screw it back into place (4 screws) and you should now have 3 cables to run from the top screen to the android unit. I ran them along the DS of the other AV units in the gap between their backets and the console, and used some corrugated tubing on the sharp edges of the bracket so the wires were safe. Plug the centre console and lower screen in temporarily and turn the car to ACC, the AV should fire up as normal. Hold the back button for 3 sec and Android should appear on the top screen. You need to set the input to Aux for audio (more on that later). I put the unit under the AC duct in the centre console, with the wifi antenna on top of the AC duct near the shifter, the bluetooth antenna on the AC duct under the centre console The GPS unit on top of the DS to AC duct; they all seem to work OK there are are out of the way. Neat cable routing is a pain. For the drive recorder I mounted it near the rear view mirror and run the cable in the headlining, across the a pillar and then down the inside of the a pillar seal to the DS lower dash. From there it goes across and to one USB input for the unit. The second USB input is attached to the ECUtec OBD dongle and the 3rd goes to the USB bulkhead connected I added in the centre console. This is how the centre console looks "tidied" up Note I didn't install the provided speaker, didn't use the 2.5mm IPod in line or the piggyback loom for the Ipod or change any DIP switches; they seem to only be required if you need to use the Ipod input rather than the AUX input. That's it, install done, I'll follow up with a separate post on how the unit works, but in summary it retains all factory functions and inputs (so I still use my phone to the car for calls), reverse still works like factory etc.
    • Place the new daughterboard in the case and mount it using the 3 small black rivets provided, and reconnect the 3 factory ribbon cables to the new board Then, use the 3 piggyback cables from the daughterboard into the factory board on top (there are stand offs in the case to keep them apart. and remember to reconnect the antenna and rear cover fan wires. 1 screw to hold the motherboard in place. Before closing the case, make a hole in the sticker covering a hole in the case and run the cable for the android unit into the plug there. The video forgot this step, so did I, so will you probably. Then redo the 4 screws on back, 2 each top and bottom, 3 each side and put the 2 brackets back on.....all ready to go and not that tricky really.      
    • Onto the android unit. You need to remove the top screen because there is a daughterboard to put inside the case. Each side vent pops out from clips; start at the bottom and carefully remove upwards (use a trim remover tool to avoid breaking anything). Then the lower screen and controls come out, 4 screws, a couple of clips (including 3 flimsy ones at the top) and 3 plugs on the rear. Then the upper screen, 4 screws and a bunch of plugs and she is out. From there, remove the mounting brackets (2 screws each), 4 screws on the rear, 2 screws top and bottom and 3 screws holding in the small plates on each side. When you remove the back cover (tight fit), watch out for the power cable for the fan, I removed it so I could put the back aside. The mainboard is held in by 1 screw in the middle, 1 aerial at the top and 3 ribbon cables. If you've ever done any laptop stuff the ribbon cables are OK to work with, just pop up the retainer and they slide out. If you are not familiar just grab a 12 year old from an iphone factory, they will know how it works The case should now look like this:
    • Switching the console was tricky. First there were 6 screws to remove, and also the little adapter loom and its screws had to come out. Also don't forget to remove the 2 screws holding the central locking receiver. Then there are 4 clips on either side....these were very tight in this case and needed careful persuading with a long flat screw driver....some force required but not enough to break them...this was probably the fiddliest part of the whole job. In my case I needed both the wiring loom and the central locking receiver module to swap across to the new one. That was it for the console, so "assembly is the reverse of disassembly"
×
×
  • Create New...