GM 3.1 / 3.4 Crank Scraper

  • Click to enlarge
GM 3.1 / 3.4 Crank Scraper

Tap to enlarge


Product Information

This scraper is designed for the 3.1 MPFI, 3100, 3400, and 3.4 DOHC engines.

Ishihara-Johnson crank scrapers are a very simple but effective way to improve the performance of your engine!

During normal engine operation a significant amount of oil adheres to or becomes entrained in a cloud surrounding the spinning bottom end. This oil eats up horsepower your engine is making by increasing the rotating mass and also creating parasitic drag. A crank scraper mechanically strips off excess oil by coming close to, but not touching*, the moving crankshaft and rods. It also interferes with the pressure differential that draws oil into the so-called windage cloud.

Our crank scrapers are constructed from 12 gauge mild steel (about 2.5mm thick) and include installation instructions.

PDF of the installation instructions


Product Code 283400CS
Manufacturer Ishihara-Johnson
Stock Level 5
Condition New
Weight 2lb

This field is required.

Follow Us

Mailing List

Enter your e-mail address to receive our newsletter
Please enter a valid email address.
Email address already subscribed. Continue if you wish to unsubscribe.

eCommerce by CubeCart