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Main and rod bearings


wagnerf15

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I suppose factory is the way to go for these parts, but anyone have thoughts or experiences with other products (Ireland, RaceTEP, BavAuto) that might keep me from making a well-known mistake? Clearly saving money is important, but not the most important issue here. I'd really like to build this puppy and have it go for another 200,000 miles before it gets torn down to this stage again..........

'74 2002

4224350

Ambulatory on 2/4/9!!!

Now the hard shit begins

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There may be others on this board that know much more about the 2002 crankshaft and it's installation I know a think or two about cranks.

There is really nothing special about plain bearings. I would go with OEM replacements. You know they worked OK for 200,000 miles.

The MOST IMPORTANT thing when installing crank bearings is to ensure that the journals and rod ends are round (a bad bearing can beat a rod end oblong) and that you get the proper clearance between the bearing and the journal so the oil film can form. The oil film keeps metal from touching metal which is the main reason plain bearings fail.

The basic steps are:

Measure the journals carefully with a micrometer, select your bearings based on what you find, without letting anything turn install with plastigauge and torque to spec, remove and inspect to see if you got the gap correct, if so then clean off the plastigauge and re-install. If the gap is too tight or too loose then go swap the bearings for what you need.

Good Luck!

Remember, plastigauge is your friend.......

Patman in Tehachapi

74 2002tii known as "The Pickle"

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www.fap99.com

sells OEM- manufacturer bearings (KS)

But as Pat said, round big- ends are absolutely critical.

The mains go forever, and the rods almost as long,

but if the motor's ever been REALLY run hard, there is a

small chance that the rods have ovalized.

It's worth having them reconditioned,

because you'll get the pin bushings done too,

and they're a 'weak' spot (on an engine that can go 500,000 on a bottom end)

t

"I learn best through painful, expensive experience, so I feel like I've gotten my money's worth." MattL

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