Chevy High Performance – October 2019

14 | Here’s a

close-up of the

damage to the

crankshaft. One of

the main bearings

was welded to

the journal, as

you can see here.

Besides the rust,

it definitely is a

victim of low oil.

Before we began

the teardown we

were hoping to get

away with turning the mains and rods down 0.010 of an inch, but that’s looking

unlikely now. It doesn’t make sense to spend too much money rehabbing a

crankshaft when Summit Racing sells reman cranks for a smidge over $300, so

we may go that route.

16 | Besides

looking absolutely

terrible on the

outside, several

of the roller lifters

felt “gritty” when

spinning the roller

wheel with a finger.

Summit Racing

sells replacement

lifters for $7.50

each, so it’s not

worth trying to

rebuild them. These

automatically went

into the scrap pile.

15 | Like the pistons, several of the roller lifters were rusted tight in their lifter

bores. Because of that, we couldn’t get the camshaft out of the way to knock the

lifters out. If you run into this issue, there’s an easy solution. The outer main cap

bolts use short threaded ends on top of each bolt for securing the OEM windage

tray. These are the same size as the bolts for the camshaft’s timing pulley.

Thread the main bolts in backward like you see here, and a large screwdriver or

pry bar will give you enough leverage to spin the camshaft over and break the

lifters loose.

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