Jump to content
SAU Community

Recommended Posts

Hi guys,

I've got a R32 GTST with an RB20DET in it.

The head gasket appears to be on its way out so I am looking at a rebuild seen as I have to dig down that far into the engine.

I have the following parts bought for this round of work-

Conceptua head gasket kit- inlet, manifold, rocker covers, head gaskets

Conceptua head to manifold gasket

Conceptua manifold to turbo gasket

Conceptua turbo to turbo elbow gasket

Conceptua decat gaskets

Conceptua manifold studs

Conceptua Fuel filter

Conceptua Oil filter

Exedy organic clutch

A new oil pump

Japspeed Oil cooler and filter relocation kit

HKS oil temp gauge

HKS coolant temp gauge

Do-luck steel braided brake lines

I'll be ordering a fmic from japspeed tomorrow.

I've been talking to a mechanic already about carrying out this work and he has said he will arrange for new shells, bearings etc in the bottom and a clean and hone from a local engineering shop.

I'm looking for peoples thoughts on this rebuild please-

What other parts should I buy?

What other work should I have done while the engine is out?

What parts should I upgrade now instead of later on?

You get the picture- if you have been there already or have useful knowledge I'd really appreciate you sharing it.

ps.

The car has the following work down so far-

Japspeed alloy radiator

Japspeed engine torque damper

Japspeed rear strut brace

Japspeed turbo elbow

Japspeed down pipe

Japspeed decat

Tannabe cat back system

Conceptua BYCAS system

K&N air filter

255lph fuel pump

Apexi RSM (wired in)

Apexi AVCR (wired in but not set up)

Apexi SAFC (just sitting there)

R33 GTR Brembo calipers and discs

Link to comment
https://www.sau.com.au/forums/topic/308996-rb20det-engine-rebuild-question/
Share on other sites

Turbo is standard and running at 0.8 bar.

I am really only at stage one tuning for the moment and probably running about 230bhp and 210 torque.

I know the motor can stay in for the head gasket replacement but the mechanic I am going to use reckons it would cost the same in labour charges for him to leave it in and work on or take it out and work on.

If he takes it out it will make life a lot easier for him.

While it is out he is planning on sending it off for a clean and hone, then some new shells, bearings etc. ???

I've never been into that part of the engine myself so its kinda over my head.

^ I couldn't agree more.

cruising_r32 - I'm really failing to see how it can be "about the same" price.

You have to take the head off regardless. Motor in or out. Motor out just adds on another day or two's work pulling it all out.

All the work you've listed can EASILY be done with the head off.

The stud's etc etc all bolt into the head, not the block, so it'll be a piece of piss doing it on a bench

The old RB20 will hold ~250rwkw (~340rwhp) without ANY worry in the world. I would just rip the head off. Do your studs/gaskets and so on, put it back on.

Whist it's off have a good look, but i would highly doubt anything major would be wrong at all requiring any work.

If you don't plan on doing anything more than the above power, then there is little realistic reason i see, to rebuild/alter anything at all.

Cheers for the info.

When you say studs, do you mean the head bolts- like the ones ARP make?

I've got the exhaust manifold bolts already bought.

Once it is all put back together including the new front mount inter cooler I will be happy enough with the power for now. It is my budget that is stopping me from going any further at the moment as I have a second R32 I am trying to get track ready.

BUT in the near future I hope to go for more power, nothing stupid, just another hundred or so horses.

So, if I am planning on pushing more power in the next year or so-

What work should I be thinking about?

Sorry for the vague questions but I know you guys have pushed your RB20's way further than most people up on this side of the planet so I'm curious to see what way you think I should proceed.

Any help or suggestion would be appreciated.

Alan.

No i meant your exhaust manifold studs (ones you have already).

If you plan on more power, only 100HP - basically... nothing.

The factory RB20 in good condition will make those power levels day in, day out, as long as you service it regularly and don't thrash it all the time (sitting on limiter, 5min burnouts etc etc).

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

    • Did this end up working? Did you take some pictures?
    • And finally, the front lower mount. It was doubly weird. Firstly, the lower mount is held in with a bracket that has 3 bolts (it also acts as the steering lock stop), and then a nut on the shock lower mount itself. So, remove the 3x 14mm head bolts , then the 17mm nut that holds the shock in. From there, you can't actually remove the shock from the lower mount bolt (took me a while to work that out....) Sadly I don't have a pic of the other side, but the swaybar mounts to the same bolt that holds the shock in. You need to push that swaybar mount/bolt back so the shock can be pulled out past the lower control arm.  In this pic you can see the bolt partly pushed back, but it had to go further than that to release the shock. Once the shock is out, putting the new one in is "reverse of disassembly". Put the top of the shock through at least one hole and put a nut on loosely to hold it in place. Put the lower end in place and push the swaybar mount / shock bolt back in place, then loosely attach the other 2 top nuts. Bolt the bracket back in place with the 14mm head bolts and finally put the nut onto the lower bolt. Done....you have new suspension on your v37!
    • And now to the front.  No pics of the 3 nuts holding the front struts on, they are easy to spot. Undo 2 and leave the closest one on loosely. Underneath we have to deal with the wiring again, but this time its worse because the plug is behind the guard liner. You'll have to decide how much of the guard liner to remove, I undid the lower liner's top, inside and lower clips, but didn't pull it full off the guard. Same issue undoing the plug as at the rear, you need to firmly push the release clip from below while equally firmly gripping the plug body and pulling it out of  the socket. I used my fancy electrical disconnect pliers to get in there There is also one clip for the wiring, unlike at the rear I could not get behind it so just had to lever it up and out.....not in great condition to re-use in future.
    • Onto the rear lower shock mount. It's worth starting with a decent degrease to remove 10+ years of road grime, and perhaps also spray a penetrating oil on the shock lower nut. Don't forget to include the shock wiring and plug in the clean.... Deal with the wiring first; you need to release 2 clips where the wiring goes into the bracket (use long nose pliers behind the bracket to compress the clip so you can reuse it), and the rubber mount slides out, then release the plug.  I found it very hard to unplug, from underneath you can compress the tab with a screwdriver or similar, and gently but firmly pull the plug out of the socket (regular pliers may help but don't put too much pressure on the plastic. The lower mount is straightforward, 17mm nut and you can pull the shock out. As I wasn't putting a standard shock back in, I gave the car side wiring socket a generous gob of dialectric grease to keep crap out in the future. Putting the new shock in is straightforward, feed it into at least 1 of the bolt holes at the top and reach around to put a nut on it to hold it up. Then put on the other 2 top nuts loosely and put the shock onto the lower mounting bolt (you may need to lift the hub a little if the new shock is shorter). Tighten the lower nut and 3 upper nuts and you are done. In my case the BC Racing shocks came assembled for the fronts, but the rears needed to re-use the factory strut tops. For that you need spring compressors to take the pressure off the top nut (they are compressed enough when the spring can move between the top and bottom spring seats. Then a 17mm ring spanner to undo the nut while using an 8mm open spanner to stop the shaft turning (or, if you are really lucky you might get it off with a rattle gun).
    • You will now be able to lift the parcel shelf trim enough to get to the shock cover bolts; if you need to full remove the parcel shelf trim for some reason you also remove the escutcheons around the rear seat release and you will have to unplug the high stop light wiring from the boot. Next up is removal of the bracket; 6 nuts and a bolt Good news, you've finally got to the strut top! Remove the dust cover and the 3 shock mount nuts (perhaps leave 1 on lightly for now....) Same on the other side, but easier now you've done it all before
×
×
  • Create New...