Jump to content
SAU Community

Recommended Posts

I'm after help please, I need a head gasket to suit rb26 / rb30.

I'd prefer genuine Nissan but can't get any from Nissan parts. 

The only options are mls gaskets or durapro.

NOT using an mls gasket. Are the durapro any good or does anyone have a Nissan one for sale?

The block is a low km rb30 and the head is from r34 GT-R rb26. How do I tell how much has been machined from the face? Are there marks on the head to use as a reference.

I know it's been surfaced previously. Also the more compression I can get the better. There is a .8 mm durapro gasket available . Does that sound correct?

Link to comment
https://www.sau.com.au/forums/topic/472248-rb2630-head-help/
Share on other sites

Don't have to go into it if you don't want but why do you not want a MLS gasket? And why is it you think you can't get parts from Nissan? They have a warehouse in Sydney and I'm very sure you would be able to get an RB30 gasket from them.

Places like repco would also have standard fibrous non-MLS gaskets in stock for RB30

  1. Turn it upside down.  (make sure that there's a spark plug and the valves in one chamber but without springs)
  2. Make it level.
  3. Coat the back of the valves in one chamber with vaseline.
  4. Put a light smear of vaseline around the head face around that chamber.
  5. Place a sheet of clear perspex/acrylic with a 10mm hole in the middle of it over the chamber.
  6. Set up the burette in a retort stand over the hole in the acrylic sheet.
  7. Fill burette with water.
  8. Titrate water into the chamber until it just fills the chamber, leaving no bubbles against the acrylic sheet.  May have to wiggle the head a little to encourage the bubbles to come to the hole in the centre.  Do not fill until the hole in the centre is full.  Fill until the meniscus of the water is just into the bottom of the hole.
    1. The chamber volume will be more than the capacity of a 50cc burette.  So run 50cc in, then refill the burette and run the rest in.  Add the total volume.
    2. If you do not have a burette and can get hold of some decently accurate syringes, you can use those.  Not as precise as using a burette.
  9. When you have the total volume of water that went into the chamber, you can calculate the chamber height difference required to give you this answer instead of the well know "stock" chamber volume for the head in question.
    1. Get the diameter of the chamber at the head face and calculate the cross sectional area.  If the chamber is not round, then you will have to work out the cross sectional area via other means.  Putting ink onto the head face and making a print of the chamber could be the first step that would allow yo to use precise scales or a scanner and some software or any of a range of other techniques to get the cross sectional area.
    2. The cross sectional area, multiplied by a small vertical distance, will give you a volume equal to the missing chamber volume.  This might be as little as 0.1mm or it might be 1mm, or any other number.  Either do it via trial and error or rearrange the equations to solve for the height difference exactly.
Edited by GTSBoy

http://justjap.com/manufacturers/oem/332/534/genuine-nissan-head-gasket-nissan-rb26dett.html

or $51US on Amayama for a genuine RB26 gasket.

 

I agree with no MLS gasket if you can't be certain of the RA on the block deck.

Are you worried about PTV clearance or static compression? I wouldn't worry too much about the static comp, dummy assemble and measure the crown clearance with pasticine to work out PTV and your cam timing options.

Just Jap don't have them in stock and don't know when they will be. 

Nissan have zero listed in the country.

I managed to find an old stock vl vrs kit locally for $80 . Pick up tomorrow.

I was more curious how much meat has been skimmed off my head. 

Thanks guys for input on working out compression. 

It's going in this old banger I picked up. Aiming for 350rwkw with bits I have laying around

IMG_20170831_115657952.thumb.jpg.0719676e2a13831942dd27e5cb202bd2.jpg

  • 2 weeks later...

I'm just assembling the timing belt and not sure about the belt tension.

It seems taught enough without any load on the tensioner. It seemed as though the belt could of been a tooth longer as it wasn't easy to get on. ( Using gates 152 tooth belt.)

The timing marks line up, belt seems tight enough. Should I tighten the tensioner as is or get more load.

Is this common? Will the belt free a little now it's under load? 

I've attached pics if anyone can assist.IMG_20171019_164903677.thumb.jpg.b0c4cc37479f453d9bc1793b2970e059.jpgIMG_20171019_164857288.thumb.jpg.727b107a8fdaa2fe4c891719776c70b5.jpgIMG_20171019_164930551.thumb.jpg.146b4ddac162d7c6b80023c772e352a4.jpgIMG_20171019_164909189.thumb.jpg.e438e4f5c35d191993e413cb87565c1d.jpg

 

Impossible to tell from photos. It all depends on where the tensioner stud is tapped into the block as to how hard the belt it so get on. On my car its pretty tight a to get the belt on and doesn't require much tension adjustment to get it to correct. I have done heaps of timing belts and my rough gauge is you shouldn't be able to turn it more than 45 degrees with a decent amount of hand pressure line in your pic.

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...