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When Buying A Skyline How Do I Know If Its Got Forged Internals?

Shmee33

By Shmee33,
in Engines & Forced Induction

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arep3 Experienced

arep3

Posted
Posted

you dont. alls you can find out is what the person selling the car says. for example, IF i were to sell my car i could show you photos of the motor being built. i can show you the motor bolted in the car and i could show you invoices of the parts as i bought them, but how do you know that i havent sold the motor and replaced it with a stock motor with shiny painted covers?

you could make educated guesses from what the car and motor are like and from what info you are supplied but theres not way of being 100% without opening the motor up...

den001 Proficient

den001

Posted
Posted (edited)

the best way would be take it to a reputable workshop, some have fibre optic cameras, take of oil drain hole for turbo and stick the camera up and have a look

Edited by den001
GTRsean Grand Master

GTRsean

Posted
Posted

Use a borescope camera down the plug hole to see the top of the piston for serial/part numbers. And use the borescope up the oil drain plug too....

The scopes we use are only 5mm in diameter and flexible, so they are one of the best tools.

That's if you can get a hold of one.

**RB2530** Proficient

**RB2530**

Posted
Posted

Find someone who knows what forged pistons sound like when the engine is first started. Get them to listen to it. They are noisy due to larger piston to bore clearance required because forged pistons expand more when hot.

I run CP pistons and they have a relatively small piston to bore clearance and I can still tell easily.

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