Circle Track Crate Engine Technical Manual - Chevrolet Performance

Engine Components Continued
Rocker Arms
The photo at far left show the
stamped steel rockers and kool nuts
that are installed on the 88958602
& 88958603 engines. The photo on
the immediate left shows the kool
nut used on all 19258602 engines
and any 88958603 engine built after
May 1, 2010. Rocker arm
adjustment is critical. (See page 9)
This photo shows the aluminum roller rocker arms that are installed
on 604 engines.
602 & 603 engines use stamped steel rocker arms.
Rocker arm adjustment is critical. (See page 9)
Oil Pans
The 602 engine uses an 8 quart pan (including filter) that is 8” deep. The sump is 9 ½” long and 11” wide.
It fits stock front sub cars (with stock engine location). The right side of the pan is kicked out 3 ¼” and has
3 trap doors to control oil. It has a built-in crankshaft scraper and comes with a louvered windage tray.
The 603 & 604 engines use an 8 quart pan (including filter) that is 7” deep. The sump is 12” long and 14”
wide. It fits stock Camaro front subs and most fabricated subs (with stock engine location). It has 6 trap
doors for oil control, 3 crankshaft scrapers, oil temp fitting and a louvered windage tray. Below is a photo
of the louvered windage tray.
Photo of the 603 & 604 oil pan. Photo of the louvered windage tray.
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