Jump to content
SAU Community

Adjustable Cam Destroyed Cas - Wtf?

jonathon

By jonathon,
in Engines & Forced Induction

 Share

Recommended Posts

jonathon Enthusiast

jonathon

Posted
Posted

Hey I've been having random starting issues and after it finally showed a diagnosis code I removed the cas - and I found the the exhaust cam bolts have rubbed against the cas! Am I missing a gasket or something to give it more room?

I would have hoped the mechanic would have noticed when they were adjusted!

post-32397-0-58687600-1406294427_thumb.jpg

post-32397-0-35337900-1406294626_thumb.jpg

Link to comment
https://www.sau.com.au/forums/topic/446065-adjustable-cam-destroyed-cas-wtf/
Share on other sites
jonathon Enthusiast

jonathon

Posted
  • Author
Posted

Well when I got it back from the tuner it had new bolts on the cas - so I'm thinking they replaced the original and didn't put washers back on!

I think I will be having words with them....

  • Like 1
jonathon Enthusiast

jonathon

Posted
  • Author
Posted

Wow.

And looking at it it appears to be set to zero. Bit hard to see in the photo though.

I think it has a small adjustment.

I've put it all together and it still won't start - the injectors ticked when the cas was spun, and there's spark in the plugs - so fuel problem?? Or would the replacement cas put the timing too far out to start it????

Chris32R Proficient

Chris32R

Posted
Posted (edited)

Piggaz is on the money. No washers inside that rubber gasket causes the cas to get too close to the cam gear. It doesn't look like there is any of the washers inside that gasket in the pics.

Edited by Chris32R
jonathon Enthusiast

jonathon

Posted
  • Author
Posted

R32-25t - I think that mark is where a washer used to be as the gasket is pretty hammered!

double check that the input shaft for the cas hasn't snapped off

double check that the input shaft for the cas hasn't snapped off

Yeah the input shaft locator is broken off in the cas - so I'm trying to line up the new cas into the shaft, but it's bloody hard!
jonathon Enthusiast

jonathon

Posted
  • Author
Posted

AF53B8B7-3F5C-424D-9AB8-F0DFBBF75FC8.png that's a washer, you can see the outline of it clearly

Ah I can see what you mean now I'm at the car - there is a small washer inbuilt into the gasket on the cam cover - if this is all that's needed I'm confused how the cas was touching the cam bolts....

89CAL Grand Master

89CAL

Posted
Posted

can happen if the wrong washers are in there (not thick enough) but hard to say just from the pic. They look right, but you might be best off doing some measurements I think. Measure the thickness of the washers, etc. If you can source another CAS (cheap second hand one might be best) and put it in the car then turn it over by hand slowly and listen to see if it rubs it might tell you a bit more. I'd order a new seal and washers, not that expensive.Then see if it still hits

jonathon Enthusiast

jonathon

Posted
  • Author
Posted

I've now replaced the cas - as it was scored on the inside.

I have got the car briefly running with it all together - and I think it is clearing fine as no marks are on the new cas so the gasket with washes included must be fine.

On reflection, ages ago I had the car running without the cam cover for a short drive, and didn't hear / see it rubbing, but I guess it must have been - a lot of damage with only 10mins of running!

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

    • QB6SAGR
      RB20 in need of modest love injection

      By QB6SAGR · Posted

      Thanks for the info GTSBoy, legend. If there is no downside i'll likely just get the larger bosch units because why not... I remember hearing stories about people washing their bores with fitment of too large injectors way back when, which i guess has made me shy about it now. But happy to know it shouldn't be an issue. Ozdavroz, the little rb20 is a lot of fun- now that i have a little extra funds and time i am very glad to be tampering with the ol girl again, after so long. More RB20's on the road the better. Cheers, Rowdy
    • dbm7
      Shifting questions

      By dbm7 · Posted

      ...just a note of warning, you shouldn't drive it about with the TCU in limp mode with only 3rd gear available ~ apart from the fact you end up sheering the ATF at the torque converter interface, the high clutch in these isn't especially the strongest, particularly bolted to the RB25DE mill...which is likely a 4AX01 box with lighter duty high clutch (the RB25DET got the bigger high clutch)...be careful out there...
    • Ozdavroz
      RB20 in need of modest love injection

      By Ozdavroz · Posted

      Hoping to do similar mods to my RB20 once I get it running and reliable again
    • GTSBoy
      RB20 in need of modest love injection

      By GTSBoy · Posted

      As you're looking at using a Link ECU, then large injectors are not a problem. But there's not really any need to go 1000s on an RB20 unless you're planning >>600HP on E85, which would seem unlikely. There are other options for injectors. The Xspurt ones are available from a number of places and you can get them in the mid 600s and 725cc, which is probably a sensible place to be. These are all EV14 based. If you are not using the stock AFM (at all, which would be the case with a Link) then a large turbo intake pipe to suit the ATR turbos is not an obstacle, so you should use one instead of a highflow. Results will be better.
    • QB6SAGR
      RB20 in need of modest love injection

      By QB6SAGR · Posted

      Hey guys,  I'm after some advice and this here is the best place to get it imo. I was a member a looong time ago under another account, with a lost email address. Its nice to jump back on and see some of the same names still giving good advice.  I mothballed my car when i moved to perth in 2013, and after getting towed across the nullabor a few times it has officially done more km's on a trailer than under its own power. Now that i have started the process of tidying up and modifying it, i see the fruit available (and the fruiterers selling the produce) is different than back in the day. hence my questions, as i used to 'know' what to get and now, i'm not so sure. Engine wise the car (92 gtst) has a walbro 255, k+n, fmic, cam gears and and turbo back 3"exhaust. Wish list is a Hypergear high flow or ATR43G1, Link G4x and some newer injectors before a tune up. My goals are modest, only low 200's power wise. i know i could achieve this with less, but i've been swapping out old for new where i can. Every cooling hose has been replaced, along with mani gaskets, WP, thermostat and radiator, fuel pump and timing belt, tensioner and idler, and i rebuilt the steering rack. Regarding the injectors, the fruiterers all seem to sell what used to be considered quite large injectors. There are a lot of options for bosch 1000cc EV14's, and i would like to know if that is a suitable choice for my build. Is modern injector design good enough to run these at the low duty cycles that i likely would be? is there a downside to running a too large injector these days? or, would there be an upside to running a smaller injector at higher duty cycle? I can see that there are smaller injectors still available, but the ones i have seen specifically marketed for RB's are pretty large (see: https://golebysparts.au/collections/fuel-rail-injector-kits/products/nissan-rb20-fuel-rail-bosch-980cc-1150cc-injectors-turbosmart-fpr800-regulator-kit), and i dont know enough about them to say one not marketed for RB's would fit or not. I have searched the forums, and amongst all the posts on older tech, I did see gtsboy recommend EV14's, but no size was mentioned... again, i'm not clear on if the smaller size bosch injectors are also EV14's as they do look similar.  also, if someone can recommend a tuner familiar with RB's in the Geelong or West Melbourne area i'd appreciate it. Thanks in advance guys. Cheers, Rowdy  
×
×
  • Create New...