Jump to content
SAU Community

Blown Gasket On Rb26 - What Parts To Get To Strengthened While Im At It?


Recommended Posts

Hey guys, i just blew the head gasket in my rb26 engine (r33 gtr), im going to get it all rebuilt and was wondering the best parts to get while it's all out?, thinking of strengthening everything i can...im after a strong street car able to handle close to 650hp.....

what size/type gasket to get, and also other things to buy at the same time while its all out?, maybe rod bolts etc.....whats the good stuff to buy for these engines to make them way more reliable for the street(daily driven)

cheers.

HKS Metal head gasket, or if you're going for a full build for 650hp, try this (all prices from greenline):

TOMEI Forged Piston Kit 86.5mm - $1420

Argo Forged Conrods - $1100

TOMEI Poncam Camshaft and Pulley Kit Type B - $900

TRUST Timing Belt Cover - $75

TOMEI Gasket Kit 87mm 8.6 comp - $380

TRUST Oil Pan Upgrade Kit - $370

TOMEI Conrod bearings - $210

Valve guides - $400

Head service - $450

Pressure test - $55

Remove and resit vavle guides - $240

Will be more if you need oil/water pumps and more extensive headwork.

Edited by Brockaz

Cheers mate, im pricing up everything right now, im thinking of doing it all right the first time.....what headgaskets are good for street rb26dett, that are strong for up to 600hp max....i think that would be my goal - 500-600hp max and for street, responsive car. Theres so many different sizes for the headgaskets, and i guess the forged pistons will have to match this size too? or not??? Wanting to order everything asap as i need the kit fast.

Yes if you go for oversized pistons, say 86.5mm, you will need an 87mm bore head gasket.

Head gasket choice will be affected by piston choice.

If you go for tomei 86.5mm pistons, go for a tomei 87mm head gasket.

if you go for HKS 87mm pistons, go for a HKS 87.5mm head gasket.

I'd chose both 1.2mm thick.

Thanks:), manage to do half of it today - will be finishing the second half tommorow, and get it taken to specialists to check the head for cracks, warped head etc....

Can i check the bore size using like a vernadial? - so basically .5mm difference in gasket size is alright to do(so long as it's .5mm increase?), and do i need to seal the gasket with anything, ive been searching the forums, alot of people say metal head gaskets don't need to be sealed with any sort of sealant, others reccomend it be done....

P.S: I have wiseco pistons already (as per the rebuild notes - i will confirm this tommorow when head is apart though)...

Question ive been dying to ask, and one that i had removed not so long ago when posting a thread(even though io searched alot of times)....

What is the stock rb26 compression ratio and gasket thickness?....

And why would i go say 1.2mm over say 1mm? - for a car aiming not for high hp, but street response and around the 300awkw-320awkw maybe down the line max...what compression ratio would suit?.

Either way im really thinking of going the 1.2mm route now anyways, after searching miliions of threads on this topic:)

Thanks for all the help!

Edited by nsta

Hey - the tomei head gasket kit comes with a oil restrictor gallery orifice.....is this something that the specialists needs to do when dissembling the head - or something that i could do myself when putting the mototr back together once the heads been tested/repaired?

Head nearly off - intake side all done, just oding the last bits of the exh side tommorow - do the turbos need to come off to remove the head?, or could we get away with removing the exh manifolds from the turbos and leave the turbos intact?

Also, i had a very hard time with the Oil/water feed lines on the exh side, as whoever tightened the nuts last, done them extremely tight!!!, we ended up having to pull the whole feed out from around the back of the head....in the process the lines had bent abit, but i assume we can bend them back into shape and all is ok? other than that no real dramas.

Thanks.

You will need to completely strip it anyway to get it cleaned, checked and bored. My advice is get a couple of cardboard boxes and put the head stuff in 1, exhaust in 1, intake in 1 and front stuff in another box.

It took me approx 5hrs to do the top and sides and half the front. Considering I have no idea what most of the parts are and I had to go and buy some tools to get afew bolts undone I was happy with the effort (and saved money at the same time).

Hahah im in the same boat, just going bit by bit trying to figure it all out one by one - not that hard so long as i make sure i do i go by manual - and do it all by the book i guess.....timing belt may be something ill take my time to do.

thanks.

hi mate, my old 26 was 620bhp @ the fly. homebuilt here is the spec.

block bored to suit cp forged pistons, std rods,

std crank acl bearings, n1 oil/wtaer pumps.

hks 25/30,s @ 1.5 bar tomei turbo elbows, decat 3.5" full system

720ccinj, tomei in tank pump, hks fuel adj reg.

1.2mm tomei headgasket and restrictor fitted

jun stage one cams 264/272 9.7mm lift.

apexi power fc d-jetro

made 612bhp and 450lbs @ the fly

hope that helps.

p.s std rods are good for 650bhp tops.

Edited by rockabilly

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

    • Even more fun, leave all the ADAS stuff plugged in, but in different locations, hopefully avoid any codes!   And honestly, all these new cars with their weird electronics. Pull all the electronics out Duncan, and just shove an aftermarket ECU and if needed a trans controller in, along with a PDM. Make it run basic but race car styled!
    • To follow up a question from earlier too since I had the front bar off again (fking!) This is what is between the bumper and the drivers side wheel And this is the navigator side, only one thing but its a biggy! So basically....no putting coolers in the wheel arches without a lot of moving other stuff. Assuming I move to properly race prepping this car I'll take that job on and see how the computers respond to removing a whole bunch of ADAS modules
    • So I prepped the car for another track day on Wednesday (will be interesting to see coolant temps post flushing out and the larger reservoir, with a forecast of 3-14 being 20o cooler than last time I took it out). Couple of things to mention; since I am just driving the car and not taking a support vehicle, I took the rear seats out and just loaded the back up Team Trackday style. Look at all that space! To cover off removing the rear seat....it is weird (note the hybrid is probably different because it wouldn't have folding rear seats) Basically, you remove the lower seat base, very similar to a r series but it is a clip that pulls forward to release the base rather than it being bolted down. Easy Then, you need to remove the side section of the rear seat on each side. There is a 14mm head nut at the bottom of the side piece, the it slides upwards off a hook at the top to release; you also need to unhook the seatbelt from the loop at the top. Then the centre piece is weird. You need to release/fold the seats forward with the tab in the boot on each side From there, there are 2,x12mm headed bolts holding the rear of each seat to the folding bracket, under the trim between the rear seat and the boot (4x christmas tree clips there, they suck). The seat is out but you can see where the bolts attach to the bracket
    • As discussed in the previous post, the bushes in the 110 needed replacing. I took this opportunity to replace the castor bushes, the front lower control arm, lower the car and get the alignment dialled in with new tyres. I took it down to Alignment Motorsports on the GC to get this work done and also get more out of the Shockworks as I felt like I wasn't getting the full use out of them.  To cut a very long story short, it ended up being the case the passenger side castor arm wouldn't accept the brand new bush as the sleeve had worn badly enough to the point you could push the new bush in by hand and completely through. Trying a pair of TRD bushes didn't fix the issue either (I had originally gone with Hardrace bushes). We needed to urgently source another castor arm, and thankfully this was sourced and the guys at the shop worked on my car until 7pm on a Saturday to get everything done. The car rides a lot nicer now with the suspension dialled in properly. Lowered the car a little as well to suit the lower profile front tyres, and just bring the car down generally. Eternally thankful for the guys down at the shop to get the car sorted, we both pulled big favours from our contacts to get it done on the Saturday.  Also plugged in the new Stedi foglights into the S15, and even from a quick test in the garage I'm keen to see how they look out on the road. I had some concerns about the length of the LED body and whether it'd fit in the foglight housing but it's fine.  I've got a small window coming up next month where I'll likely get a little paint work done on the 110 to remove the rear wing, add a boot wing and roof wing, get the side skirt fixed up and colour match the little panel on the tail lights so that I can install some badges that I've kept in storage. I'm also tempted to put in a new pair of headlights on the 110.  Until then, here's some more pictures from Easter this year. 
    • I would put a fuel pressure gauge between the filter and the fuel rail, see if it's maintaining good fuel pressure at idle going up to the point when it stalls. Do you see any strange behavior in commanded fuel leading up to the point when it stalls? You might have to start going through the service manual and doing a long list of sensor tests if it's not the fuel system for whatever reason.
×
×
  • Create New...