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Piston Rattle

mick1223

By mick1223,
in Engines & Forced Induction

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mick1223 Explorer

mick1223

Posted
Posted (edited)

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
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Ben C34 Grand Master

Ben C34

Posted
Posted

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.

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portaz Mentor

portaz

Posted
Posted

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.

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StevenCJR31 Veteran

StevenCJR31

Posted
Posted

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

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Blitz Grand Master

Blitz

Posted
Posted

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.

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(OO)SKYLINE(OO) Grand Master

(OO)SKYLINE(OO)

Posted
Posted

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.

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GTScotT Grand Master

GTScotT

Posted
Posted

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.

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StevenCJR31 Veteran

StevenCJR31

Posted
Posted

^^ 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

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