Jump to content
SAU Community

Recommended Posts

Hi guys,

Just found out that my bottom end is fine and that the problem piston rattle..

my question to you guys which I cant find a answer for anywhere is how safe is it to drive with piston rattle.

The engine is a fresh rebuild with old pistons and rods but everything else is pretty much new.

its very faint sound to the car warms up then you can kind of hear it .

oh and its in a R32 GTR with a RB26DETT

Thanks all and if u have any questions ask me

Edited by mick1223
Link to comment
https://www.sau.com.au/forums/topic/423641-piston-rattle/
Share on other sites

Well i would be getting out sorted asap. Goes to show you can't cheap out on a rebuild, ends up choosing mire doing it twice. What about the other parts you claim are pretty much new? Maybe revisit those when its apart the second time.

Link to comment
https://www.sau.com.au/forums/topic/423641-piston-rattle/#findComment-6817712
Share on other sites

Well I would consider piston slap bottom end, seriously consider a different builder it amazes me he would put old pistons and oil pump in an rb26 I'm my opinion it should have stayed in pieces waiting for new parts due to the labour involved in pulling one out and stripping it down, anyway if it were mine I wouldn't drive it.

Link to comment
https://www.sau.com.au/forums/topic/423641-piston-rattle/#findComment-6817805
Share on other sites

Why does everyone say bottom end. I just had my bottom end done.

Is it really that unlikely to be piston slap

the pistons ARE part of your bottom end anyway!

wether it be pistons or bearings that motor is waiting to fail

Link to comment
https://www.sau.com.au/forums/topic/423641-piston-rattle/#findComment-6818397
Share on other sites

Why does everyone say bottom end. I just had my bottom end done.

Is it really that unlikely to be piston slap

Simple answer, because pistons ARE part of the bottom end, something you need to understand unless you want this workshop to continue feeding you horseshit.

Link to comment
https://www.sau.com.au/forums/topic/423641-piston-rattle/#findComment-6818426
Share on other sites

The engine is a fresh rebuild with old pistons and rods but everything else is pretty much new.

When an engine is built, critical tolerances are measured, including bore to piston clearance.

If your engine was assembled with that out of spec, I would run as fast as possible from that guy!

+1

Hence why it should be built with new Pistons and Rods.

Link to comment
https://www.sau.com.au/forums/topic/423641-piston-rattle/#findComment-6818595
Share on other sites

Yep +1 to Steve/Nick

Piston slap just means it was a shit build to start off with. In this day and age there shouldn't be any at all if the motor is built to correct tolerance.

Agree.

I paid a good machinist to do my bores for this exact reason. Am using CP's in an SR and they are dead freaking silent.. They measured the pistons themselves and determined the bore size from there.

I've heard enough SR CP slap stories to last me a life time. Cheap shit builds.

Link to comment
https://www.sau.com.au/forums/topic/423641-piston-rattle/#findComment-6818628
Share on other sites

^^ at least with new pistons there would be a valid warranty claim- using secondhand pistons the original engine builder could tell you to get stuffed, im all for using secondhand parts but im aware that im taking a chance

Link to comment
https://www.sau.com.au/forums/topic/423641-piston-rattle/#findComment-6818836
Share on other sites

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

    • That R31 was so cool. Only did Orange Park once. Scared the hell out of me.
    • Selling my TE37SLs since I've switched to smaller wheels.  They're for sale in Japan but it's pretty simple to send them overseas; USA excluded, since JPPost isn't sending there at the moment. Specs Front: 18x9.5j +22 5x114 Rear: 18x10j +20 5x114 Price: 320,000 JPY/ 3,285 AUD (current FX rate) Condition: a few scratches here and there, no bends, distortions or cracks.  Tires will not be included for international buyers, I'll get them dismounted before shipping. They're currently listed on yahoo auction and will be shipped in Japan with the tires if they sell here. Shipping costs to Aus: EMS (1-2 weeks): AUD 1,175 (current FX rate) Sea (2 months): AUD 460  (current FX rate)
    • The alloy coolant reservoir has a sight glass, so as long as I can see coolant in the sight glass it's GTG, as for PS, it isn't anything catastrophic if it gets low, and as it hasn't lost a drop since I have owned the car I cannot see it being an issue, even after putting the "big block" 2.5 in....LOL The only time it gets slightly messy is at oil changes, as the oil filter sits above the frame, and I need to use a plastic bottle with its bottom cut off to catch the flow when loosening the filter
    • Good on you for taking on the job, but it is a big one. Even if you have bolt on manifold and turbo, you will need: Post throttle pressure source to boost controller to wastegate (and FPR, and ECU/MAP sensor) Pre throttle pressure source to top of BOV(s) Oil feed - you can take that from the standard port in the middle of the block Oil return to block under the turbo - this is much trickier than it seems to route a decent/wide pipe past the manifold. You really can't use rubber hose because it is way too hot there, and also the oil out of the turbo core is a bit frothy so it needs to have a decent diameter Water feed - you can take that from the standard port in the rear of the block. Water return - mine runs to a T into the heater box return, just make sure you don't create a high point making bleeding hard. All of those lines should use 200 series style teflon braided hose with heat shielding because everything needs to be routed past the manifold. Also a turbo beanie is a really good idea to minimise the chance of the car catching fire (under bonnet lining in particular) You also need to decide a cam cover breathing solution as well, will you vent externally via a catch can (probably illegal) or return to the intake (plumbing required and can oil up everything over time) Keep in mind the intake and exhaust piping in the engine bay will be custom so you either need to be able to fab ally and steel or have someone you can get a car that isn't running to. Get the wideband fitting welded into the dump pipe at the same time. Also, just my opinion, a screamer pipe attracts attention and doesn't add power, I'd plumb it back if you want to be allowed to keep the car on the road. BTW do you know anything about how healthy the motor is, and what power you are targeting? Doubling or tripling the factory power on an unknown motor is a little risky. Also fuel system will need some attention (pumps, high current hanger, direct power and earth feed, injectors etc)
×
×
  • Create New...