Jump to content
SAU Community

No Compression

SNSTR8

By SNSTR8,
in South Australia

 Share

Recommended Posts

DSTROY Grand Master

DSTROY

Posted
Posted (edited)
hi all have just got myself an r33 , had a previous repair on the belt and after setting everything up according to all timing marks i have no compression on any cylinders , any help on fixing this issue will be appreciated

What happened to the last belt? If it was snapped while driving then the engine is probably a throw away.

Edited by DSTROY
Link to comment
https://www.sau.com.au/forums/topic/318006-no-compression/#findComment-5198216
Share on other sites
SLED Grand Master

SLED

Posted
Posted

before you go removing the head, remove tappet covers and see if either any valves have stuck down (ie bent) or if any can be pulled out spring and all (ie broken valves)

Cant see all the valves in every cylinder kissing pistons therefore should have some pressure....you're clearly doing something wrong.

....and if a valve hits a piston, the whole motor is not necessarily a throw away.

Link to comment
https://www.sau.com.au/forums/topic/318006-no-compression/#findComment-5198269
Share on other sites
SNSTR8 Rookie

SNSTR8

Posted
  • Author
Posted

removing the head will be the last option , will be removing the tappet covers tomorrow to check out everything else . not much else you can do wrong if you set everything the way the factory says to ( ie using all of the timing marks etc ) even with no belt the motor still free spins with all the plugs in it

Link to comment
https://www.sau.com.au/forums/topic/318006-no-compression/#findComment-5198289
Share on other sites
SLED Grand Master

SLED

Posted
Posted
removing the head will be the last option , will be removing the tappet covers tomorrow to check out everything else . not much else you can do wrong if you set everything the way the factory says to ( ie using all of the timing marks etc ) even with no belt the motor still free spins with all the plugs in it

you didn't did you?

Link to comment
https://www.sau.com.au/forums/topic/318006-no-compression/#findComment-5198305
Share on other sites
SNSTR8 Rookie

SNSTR8

Posted
  • Author
Posted

no i didnt , it seems that the previous owner has spent a lot of time trying to get this thing running again and has just told me that once they had fitted the timing belt and went to start the car it locked up ( now i know i have bigger issues ) and they went over it and reset everything numerous times with no good results ( including winding the motor with out the belt to see if they had any compression ) seems that i can move both cams with little or no force aswell

Link to comment
https://www.sau.com.au/forums/topic/318006-no-compression/#findComment-5198326
Share on other sites
SLED Grand Master

SLED

Posted
Posted

clearly you guys don't know what you're doing so I suggest you see a mechanic.

First you said that it turns with no compression now you're saying that it locks up and in between you said that the motor spins freely without the belt which is an absolute NO NO to anyone that knows what they are doing....goodluck with it mate but it does look like you've got some troubles now that could've possibly been avoided if taken to a mechanic immediately

EDIT: Also, I don't see how you can turn the cams easily if the lobes are hard pressed against spring retainers.....unless of course certain valves are stuck open or broken now (which I'm guessing is quite likely).

Link to comment
https://www.sau.com.au/forums/topic/318006-no-compression/#findComment-5198336
Share on other sites
Carbon 34 Grand Master

Carbon 34

Posted
Posted

sounds like you bent the valves which now won't close to create compression, by attempting to fix something with no clue

RB's are interference engines, throw a belt, bend a valve or break them off in most cases

open the oil filler cap, have someone spin the engine by hand, see if you can see the rockers/cams etc moving at all, before wasting time pulling the head

Link to comment
https://www.sau.com.au/forums/topic/318006-no-compression/#findComment-5198901
Share on other sites

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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • MBS206
      R32 GTS (RB20DE) Injectors Replacement

      By MBS206 · Posted

      Get something that can spray a bit, something like I'd use is a pressure pack for weed sprayer. I use one with degreaser. Spray it on (make sure you're fully covered up, you don't want that shit on you, especially face/eyes). Alternatively, a paint brush will help here as you can brush and work at the stuff quite aggressively.   Be aware, citric acid can eat metal away and will cause it to rust more later. So make sure you neutralise it when done, and give the fresh metal some protection. That hanger, I'd honestly bin and get something like the Frenchy's drop in replacement. The tank, again, I'd look for something else to replace it with. Remember, as metal turns to rust, it means there's less metal there now. So some patches of your fuel tank are likely to be quite thin.   Personally, Id focus on the front end of things, IE, how did the injectors get clogged if they're meant to be after a fuel filter. Then, once the front is sorted, I'd rig something up, even like a small surge tank, and make sure the engine is now running and all behaving. Then I'd replace the fuel tank and fuel hanger and pump. Also, I'd already be preparing to ditch your fuel filter...  
    • MBS206
      Torana Lx Gtr Hatch, Lots Of Pictures

      By MBS206 · Posted

      That's looking great! Are you planning to do things like all hidden wiring with it, or you're planning to have it look more like we'd expect an RB in an engine bay to look like?
    • Hexi
      Dumb rich kid tries modding for the first time

      By Hexi · Posted

      Haha thanks everyone, I'll take everyone's suggestions into consideration. If I do eventually choose a car ill post it here update on the mods I do.
    • GabsReDeal
      R32 GTS (RB20DE) Injectors Replacement

      By GabsReDeal · Posted

      I found the ingredients at larger amounts from a Coffee Shop. 1kg Citric Acid for €8.50 500g Baking Soda for €2.50 I tried it out tonight distilled water (I got from my ACs) and dish soap. It does get bubbly with dish soap. In just two hours the hanger has improved significantly and rubbing against any remaining rust seems to flake it off. I'm going to leave it a little bit longer and see how it goes. I have read that someone even used this solution in an ultrasonic cleaner to clean a seized water pump which brought it back to life.
    • Duncan
      Dumb rich kid tries modding for the first time

      By Duncan · Posted

      If you like more modern stuff than the R series, you should check out a V37 400R, they are pretty mod friendly
×
×
  • Create New...