Jump to content
SAU Community

Recommended Posts

I brought a R32 GTR a while ago and its seemed to be going slower then when i got it

so i booked an appointment to have it serviced and check over.

While checking the engine over the 4th piston was found to have low compression and high leakage.

This is what i was given:

Compression: CYL (1) 150, CYL (2) 150, CYL (3) 155, CYL (4) 100, CYL (5) 160, CYL 6 155.

Leakage test: CYL (4) 70% Past rings.

I've been told i need a rebuild or engine replace... id much prefer to work with what i have already.

I purchased the car how it is now, and was given dyno sheets for 320awkw, before i found out about the dodgy 4th piston (but after it seemed to be a bit sluggish) i had it on a dyno at a car event and it put out 272awkw.

It seems to run fine, not blowing smoke, nothing in the oil, no weird noises or anything (except for the drop in power) and has a nice list of upgrades on it already.

but the piston and rings wont fix themselves and im too nervious to drive it now.

What should i be looking at getting for the rebuild?

it currently has:

N1 turbos (running 14psi high boost)

HKS engine oil cooler

HKS fuel rail

HKS 900cc injectors

HKS primary exhaust pipes

HKS Cam gears

Gates timing belt

Tomei cam shafts

Sard fuel reg

walbro fuel pump

external 700hp fuel pump

splitfire coils

z32 air flow meters

N1 water pump

PWR radiator

Jun metal Intake Gaskets

HKS FMIC

HD clutch

as for the rest it must be std.

I would like to have a reliable 300kw+ atw, but i know stuff all about rb26's (just love driving them) so if any one has any suggestions about what i should be doing that would be great! (just dont want to be paying for what i dont need)

thanks!!

Link to comment
https://www.sau.com.au/forums/topic/279616-stuffed-4th-piston/
Share on other sites

On the cheap (cheap is a relative term) the parts to get (other than new bearings etc);

-Pistons

-Crank collar

-N1 oil pump

The pricing for labour and machining though may be a suprise, a lot of people get to where you are right now then sell the car cheap

On the cheap (cheap is a relative term) the parts to get (other than new bearings etc);

-Pistons

-Crank collar

-N1 oil pump

The pricing for labour and machining though may be a suprise, a lot of people get to where you are right now then sell the car cheap

yeah i felt disheartened when they showed me what was happening, but i dont think i can bring myself to sell it... as Adriano said: welcome to expensive gtr ownership.

i was thinking forged pistons, rods, n1 oil pump, crank collar... i dont want to skimp on the items and have more drama's down the track, but i dont really want a 600hp monster either.

6-8k depending on the crank condition and similar

Stop driving it if its a bit damaged as well, if it lets go then it'll be more

This is the price they told me, car will be collecting dust in the garage for a while now :thumbsup:

rape it till it breaks....lol

on a serious note...

try squirting a bit of oil in the bore and re-doing the comp test...may be a valve not seating properly.

will try oil in the bore, tho the mechanic said they checked the exhaust and intake and couldn't hear the leak which ment rings? (car was at APC in brissy), dont know if they did the oil test themselves but ive been told good things about them.

I wouldnt bother with rods, the stockers are more than adequate for these sort of power levels.

yes...there is nothing fragile about stock RB26 conrods. Keep them and if you feel the need change the rod bolts to ARP items.

Edited by DiRTgarage
Try the oil in the bore and if that's no good strip the block down and if it need more than rings and bearings think about going RB30

why think about going rb30 and whats involved in it, would i be spending the same money at the end of the day?

nvm, just read the 2 rb30 conversion stickies...

but what sort of ball park figure am i looking at pulling outta the wallet?

does the fact i only want 300kw+ at the wheels prefer the 26 over the 30? just the rb30conversions i read where all big power builds

im considering building up an engine while this other one dies, does anyone know someone with a long block or comeplete engine? then i can just swap em out when its complete and then i have the stuffed one to play with and fix up over time... bit easier on the funds building the engine up over a couple of months if the current one keeps on keeping on, then i fix/sell/*dream* build track car one day with the original engine

If you just want around 300rwkw - stock capacity, paired with HKS GT-SS/-9's/-7's, R34 N1s :)

Those turbos would be too small for a 3ltr and run outta puff, they would virtually make boost @ idle though on a 3ltr lol

But ye, for the power you want i wouldn't go the 3ltr route personally

If the yen gets any better you can pick up r34 n1 long blocks for about 4-5k

the only drawbacks are..

still cast pistons.. but they do have bigger ring lands and thicker rings.

and easily get 300kw out of that without any problems..

could be a good option for you, i did a similar thing.. but then waiting for the motor got the better of me and i ended up spending about 10k in internals/parts for the build

looking around at the moment it seems maybe the 34 n1 option had dried up.. the old links i had have the motor deleted and no longer on theri websites..

one on yahoo for 1100000Y which is a bit pricey and more inline on what local places are charging.

i'm sure someone on the forum here could find you a japanese supplier if you ask them nicely enough.

you could pick up an RB30 block for $100 and have it rebuilt using standard crank, rods and just new bearings. use a set of forged pistons and you are done.

the block ready to bolt to the head would cost you about $2k. you would need a sump adapter for the 4wd but that is all. N1's are INSANE on the 3 litre and the off boost torque is great. you donrt need to rev it as hard to make the power.

if you can go and see someone local that has an rb30 in a gtr and get them to take you fro a drive. then you can be the judge :D

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

    • For these last 7 years of ownership, I've always had to use a small scissor jack under one of the front tow hooks to raise the front just enough so my low-profile jack fits under to reach my subframe jack point. I'm beginning to get annoyed of always having to do this. Are there any lower low-profile jacks that fit under the gtr lip on a dropped car?
    • Seat of the pants assessment of the new intake: The car is way less "doughy" when hitting the loud pedal, especially off idle when stopped or in traffic, I did use a cheapo lazer thermal thingo to measure the temp around where the pod filter got its air, it was between 55 - 60°C, in saying this the car was shut off and not moving, so the OEM intake pipe was not supplying any fresh air to where the pod was when the car was at least moving A weird bonus was induction noise on the throttle in the cabin increased a bit,  I was worried that I was actually going to lose some of that induction noise I love so much, outside though, when I got the daughter to do a WOT drive by pass for me, the induction noise has increased alot when on the throttle, not quite ITB doort, but well up there I'm extremely happy with the results and have been exploring the country roads in the region  As for house mods: 1.New front fence is up and is awesome, it really upgraded how the joint looks from the street, and the added security is nice 2. Electricians have replace some interior lights, and with more lighting in the garage, a few new motion detecting lights out the front above the garage, front room, and at the front door, which I have already found heaps helpful coming and going, also now has fancy pants CCTV all round the house The only hold point for power though is the solar and batteries due to supply issues, although this will happen over the next few weeks 3. I have done a heap of landscaping out the front and I'm almost ready to do a new small retaining wall with some nice blocks to replace the brick and cemented in rocks around the raised garden beds cemented in river stone "was the fashion at the time" the house was built. I currently have a pallet of retaining wall blocks and 2 bulka bags of 20mm blue metal to replace the wood chip that is in the raised garden beds around the house 4. I now have 3 big raised garden beds for out the back to grow some vegetables, about 70cm high, 200cm long and 100cm wide 5. My 2 compost bins are already pretty full with brown, green and kitchen waste from the landscaping I'vedone so far, but they will probably take a few months to break down, so anything else that gets chopped, trimmed, and kitchen waste will just start filling the base of the raised garden beds to about 30cm before I start throwing 40cm of good compost, and stuff, for the vegetables to grow in, I'll need a few ton of compost and soil, but the local supplier can sent me bulka bags of the stuff Basically the logs, wood chips and a few strategically placed rocks for drainage, will give the beds some good organic materials down low to break down over time, and they will hold moisture during the warmer months to save the water in my big arse water tank if we don't get alot of rain So, all in all, the car and house mods are going well, and I'm really enjoying being retired, I sleep in too 0700 and slowly plod around inside until I feel like actually doing anything, and only work in the yard for as long as want, which has actually been alot over the last few weeks,  although when you look at it, it seems that not a huge amount of work has been done,  until I look at the before I started the work pics Happy days and good times indeed 
    • hahaha yeah. Plan is to get side skirts and probably just rear pods. But going to do them one-by-one. I've got a set that I really like from RHDJapen, but that one isn't shipped to AU. So need to find someone who can get it for me
    • Here's an idea, answer the questions I asked you as they are trying to work out WHY the LSD will be binding up in a straight line.
×
×
  • Create New...