Jump to content
SAU Community

Recommended Posts

ey guys,

did a compression test today, however, i disconnnected every hose when i removed the intake manifold and removed all the spark plugs, then i performed the compression test.

Cylinder:

1. 146 PSI

2. 145 PSI

3. 147 PSI

4. 145 PSI

5. 146 PSI

6. 145 PSI

i dunno wat the go is.. And is this the way u do a compression test or not? by removing all park plugs and then cranking it?

Link to comment
https://www.sau.com.au/forums/topic/146595-compression-test-for-rb20det/
Share on other sites

ok....so keep all plugs in, take one out, test it, then put it back it, then take the next one out and test it yer? do i loost compression when all spark plugs r out? coz i just cranked it till it popped...

Depends on how your gauge reads dude. A lot of low qual gauges about that read way off.

Also rb20 donk is fairly low comp I'd expect 130 - 150.

You look more for variation. The readings on your engine are awesome !!

around 150psi is normal for the age the engine,manual specifies 170psi with the limit value (lowest) 128psi, the variance limit shouldnt be more than 14psi beween cylinders

u should have the engine close to operating temp at least, remove ALL plugs, attach gauge to cylinder (screw fitting is the better ones), depress pedal FULLY u must have WOT, crank till needle stops moving which should be about 7 engine revolutions, then record ur readings,

urs seem good not much variation which is good

im not sure if the readings will be lower or higher when stone cold as i have only done it when at operating temp.

maybe someone can verify that as my engine is not finished yet to be running

cheers,

brad

Edited by RB20/30Det_VL

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

    • I'm so far behind in the jobs I have to do at both work and home (including car) that I have become immortal. There's simply no way that I can die now.
    • Each to their own I guess  Me, I put just as much time into cleaning inside of the cars as I do on the outside As for getting wet, it is really no different than steam cleaning the carpets at home, apart from the cars carpet dries alot faster than the house, again, I only do it in the hotter months and leave the car opened up for a few hours As I only do it yearly, it is just before I do the diff and gearbox service, so I clean the carpets, then it's up on stands, wheels off, service, clean the undercarriage,  grease the bushings and do a nut and bolt check on everything  Disclaimer: I typically had all the time in the world to kill when I was working 🤣, so spending a full day or 2 cleaning, serving and "looking at stuff" was,  easily achievable, and a fun mental therapy day As for time to kill, I retired last Wednesday, so apart from my physical training, my days are filled with lots of random jobs around the house and garden...."Idle hands are the Devils something something" I am also buying a new house sooner rather than later, I'm actually looking at a potential property tomorrow, I'm looking forward to getting a car hoist as I'm starting to get to old to crawl around under a car, I can only imagine all the undercarriage cleaning and looking at stuff when that gets set up
    • Yeah, I'm not interested in wetting the carpets, and I don't care about brown dirt/dust that lives deep in the pile or underneath. It's not like I crawl around on them in my birthday suit or eat dropped food off them (because there is never any open food in my car). The seats are alcantara (cheap Chinese imitation alcantara, to be sure!) with barely 1" of foam pad behind the surface. That's not getting wet either. Any car that I would be happy to get the interior wet, I would not care to put the effort into.
    • We have one that holds 2.8L of water. On floor carpet that hasn't been touched in 2 or 3 years, will take a minimum of 2 fills of the tank to do a bedroom, and that's going AROUND the bed.   In the cruiser, I used an ENTIRE 2.8L tank, just on the front passenger footwell. But it had some fungus growing, and had been full of mud from being used as a 4WD for many years. I can do that floor again, and it will still pull mud out. However, the water now only looks dirty, not pitch black and leaving full sludge in the bottom of the tank it sucks back into. Oh, and, this is about a $1500 unit.
    • This is mine, works a treat for the cars, suction is good, I use the Bissell clean and protect stuff I have found giving it a good spray and light scrub with the soft brush on the head of the nossle for carpet, and a rub with a microfibre for cloth seats and cloth door trims, prior to another quick spray before vacuuming it up works the best @GTSBoy You would surprised on what it gets out of carpet and seats that actually "look" clean, I recommend that you test drive yours when you have a little time to kill, then post pics of the muddy looking water that I believe you will find
×
×
  • Create New...