Supertech Piston

Supertech Piston. Key specs: bore 89.50 mm, over size +0.5 and comp height 1.339"(34 mm). Piston and ring size depends on the bore, so match them to your block after it is measured. The fitment section lists 3 applications.

Key features

• Bore: 89.50mm
• Over Size: +0.5
• Comp Ratio: 8.6:1
• Volume CCs: -27
• Head CCs: 46
• Comp Height: 1.339"(34mm)
• Stroke: 3.780"
• Rod Length: 6.496"

Specifications

• Part type: Piston
• Bore: 89.50 mm
• Over Size: +0.5
• Comp Ratio: 8.6:1
• Volume CCs: 27
• Head CCs: 46
• Comp Height: 1.339"(34 mm)
• Stroke: 3.780"
• Rod Length: 6.496"
• Pin Diam: 21 mm(.827")

Fitment

• 1991 - 1998 Nissan 240SX LE
• 1989 - 1998 Nissan 240SX SE, Base
• 1989 - 1990 Nissan 240SX XE

OE and interchange numbers

GNH-8950

What it does

Worn rings show up as oil burning, blow-by and low compression. Using the correct part for your exact engine keeps oil pressure, sealing and timing where the engine was designed to run, and doing related parts at the same time saves taking it apart twice.

Installation & tips

• Check ring end gaps in the bore before installation and stagger the gaps.
• Bearings: Rod and main bearings are usually replaced at the same time.
• Gasket set: The engine comes apart for this job.
• Put the new part next to the old one and compare the shape, mounting points and connections before you install it.
• Work on a cool engine with the vehicle secured, and use a service manual for your vehicle for torque specs and procedures.

FAQ

What size is it?
Bore: 89.50 mm; Over Size: +0.5; Comp Height: 1.339"(34 mm).

How many vehicles is it listed for?
3 applications are listed in the fitment section above.

Can I install it myself?
Many owners do this job at home with basic tools and a service manual for their vehicle. If you are not sure, have it fitted by a qualified mechanic.

Before you order

• Measure the part you are replacing and compare it with the specifications above.