Cracking Engine For Head Gasket

[Tangles]

If I install Tomei Poncam Camshafts to my 03/1997 Rb25det in the Stagea, what else should I get done at the same time? On an otherwise unopened early ‘97 Rb25det engine with 100,000kms.

* Cometic intake collector gasket and Cometic intake manifold gasket, as well as a thicker head gasket like the Cometic 1.3mm.

* What bore size for the Cometic 1.3mm head gasket – 80mm, 81mm, 86mm or 87mm?

* Should I do head studs such as the ARP heavy duty cylinder head stud & bolt kit?

* How about Tomei valve spring lift kit to 8.8mm, to go with the Tomei poncams 256/256 / 8.5mm.

* What about replacing the intake / exhaust valve seats at same time?

* Should I buy valve guides for new valve seats as well?

** What else? Probably a Q45 90mm throttle body with sensor and harness.

For say $2200 all up delivered, that’s

1. Cometic intake collector gasket

2. Cometic intake manifold gasket

3. Cometic 1.3mm head gasket (what bore size?)

4. Tomei 256/256 Poncams, 8.5mm lift

5. Tomei valve spring 8.8mm lifter kit

6. ARP heavy duty cylinder head stud bolt kit

7. Chromium intake and exhaust valve seats

8. Bronzanium intake and exhaust valve guides

9. Q45 90mm throttle body with tps sensor and harness

For a basic engine freshen up pretty much, everything else is currently good for a 225kw setup using stock injectors. Lots of mods.

What am I missing, or going over board on.

Suggestions please for basic work when doing a Head gasket kit job – what to replace for what brand. Cheers

[Tangles]

Engine:

RB25det auto awd 100,00km fully serviced & maintained

Ryco Z201 fuel filter, Ryco Z145 oil filter, Castrol Edge 0/40w engine oil

Davies Craig automatic transmission oil cooler upgrade kit

MV Automatic shift kit & auto service kit

Koyo Radiator upgrade

Splitfire coil packs

NGK BCPRE6 0.8mm copper v-gruve spark plugs

Bosch 040 fuel pump with direct 400cc battery feed at 13.8volts

Aerospeed adjustable exhaust cam gear pulley wheel

Greddy remote oil filter relocation kit

Nismo adjustable fuel pressure regulator

Nissan Z32 Air Flow Meter

3inch JustJap stainless steel single dump pipe system (turbo to cat)

3inch Random Technology 617cfm metalcat

3inch cat-back exhaust system with Kakimoto Racing GTR free flow centre in/out muffler

Apexi pod filter

Cold Air Induction aluminium box w/ lid setup, foam internals, using standard snorkel air feed

Cold Air Radiator air guide (feeds radiator / pod / intercooler)

Apexi 'Hybrid' front mount intercooler, tube & fin and bar & plate, with custom return air feed pipe kit

Apexi boost gauge

Apexi SAFC Super Air Fuel Computer

Apexi SITC Super Ignition Timing Computer

Greddy Profec B spec-ii dual stage Electronic Boost Controller, set to 1bar and 1.1bar

HKS heavy duty turbo actuator

Sliding Performance water/oil cooled 360degree bush bearing Hi-Flow Turbocharger

Toshi ecu remap

Suspension:

Bilstein front and rear suspension shocks, with ‘lowering’ circlips, using standard springs

Whiteline front and rear adjustable swaybars

Dayz adjustable engine swaybar

Whiteline front castor kit

Whiteline rear subframe alignment kit

BJR Graphic 17inch x 7.5 rims with Hankook K104 Ventus tyres, 235/45/17

Brakes:

Maltech stainless steel braided brake lines, front and rear

DBA slotted front brake discs

Benidx Advance front and Heavy Duty rear brake pads

Custom brake master cylinder stopper

Audio/ETC:

Clarion stereo tape unit with 6-stack cd player

Clarion amp mounted to enclosure for Clarion 10inch subwoofer

Pioneer 260w 4-way front door speakers

Eclipse 80w 2-way rear door speakers

Razin volt stabiliser kit

Car alarm

Dayz bodykit, twin sunroof

[Tangles]

ok then.

got some PM advice, thanks very much Dave and Aaron

Found a really good purchase deal for the following, from a cple suppliers:

Cometic intake gasket

Cometic intake collector gasket

Cometic exhaust gasket

Cometic Head gasket 1.2mm

ARP head studs & bolts kit

Intake & Exhaust valve seals

Intake & Exhaust valve seats - Chromium

Intake & Exhaust valve guides - Bronzanium

Q45 90mm throttle body with adapter kit

Clear cam gear timing belt cover

Tomei 256/256 8.5mm poncams

Tomei oil gallery orifice

While Im doing the poncams + intake/exhaust valve seals & gaskets etc, anything else to touchup and make new????

cheers

[PM-R33]

Hey, what kind of prices have you found for the following:

Intake & Exhaust valve seals

Intake & Exhaust valve seats - Chromium

Intake & Exhaust valve guides - Bronzanium

Just rough prices would be a great help!

Thanks man

[Tangles]

hey guys, what else?

(love talking to meself lol). PM'd pm-r33 above straight away, surprisd with ALL the sau engine guru's here noone has examples to add, some help etc.

keen to learn as much as possible.

got for $1100 so far:

Q45 90mm throttle body

Cometic intake manifold gasket

Cometic intake collector gasket

Cometic exhaust gasket

Cometic Head gasket 1.2mm x 87mm

ARP head stud kit

EPP 6mm Intake valve seals

EPP 6mm Exhaust valve seals

EPP Intake valve seats

EPP Exhaust valve seats

EPP Intake valve guides

EPP Exhaust valve guides

Q45 90mm throttle body

Greddy Q45-RB25 adapter kit

EPP clear cam gear timing belt cover

will also get, soon for another $1100:

Tomei 256/256 8.5mm poncams

Tomei valve springs

Tomei oil gallery orifice

I take it thats the head work parts covered. labour will be that again I take it, too.

What else while the head is off and being touched up new.

I will also upgrade the steel fuel lines too. what size is stock fuel line - outer/inner mm diameter please?

Will port out the stock exhaust manifold, unless I can find a good low-mount tig welded one for 2-300

Looking for a real good torque figure for low thru to midrange, run the slide turbo at max efficiency. 225kw would be fine for me, with big midrange and torque.

Bottom end will remain stock.

cheers

[PM-R33]

You thinking about doing anything with the valves ie. 1mm oversized? Or getting some one to do a 3 angle valve job? Im tossing up on what to do to mine when i take the head off.

Other than that it looks like you pretty much have everything in the head covered.

[sly32]

sounds like you doing it proper, yes you will need all the gear you have listed, new gaskets everywhere, i would while the head is off put a restrictor in and do a few things thats listed in that page for oil control with rb's. might aswell do it now while everything is apart, wont cost that much at all to do and it will save your engine,

http://www.skylinesaustralia.com/forums/Oi...ui-t110680.html

[PM-R33]

Honestly if the car is only used on the street, i wouldnt bother doing the oil control thing. Up to him i suppose.

[sly32]

tru, but in the end he will want to flog it, (well i would if i had that much power, anything with a turbo i would wanna redline alot haha)