noisey 340

[pishta]

when you say oil through, I assume you mean the rod seat has a hole in it? That is so you can use them on AMC and Magnum motors also. 1 lifter, 3 platforms covered. It doesnt affect operation as it gets closed when the plunger is depressed via the check valve, essentially solid when oiled

 

[nm9stheham]

I would like to put a new crank in it to get rod side clearances to spec, however is it really necessary in a street rod engine

The side clearance is due to the Eagle rods, not the crank journal width. Their big ends are about .010-.012" narrower than stock big end widths. We put some SCAT rods in our 340 with a 273 crank and we got about the same side clearance as you: .026". The SCAT and Eagle I beam rods big end widhts are both .925".) That larger side clearance did not look to effect oil pressure: we had 67 psi at 600 rpm priming speed (1200 RPM crank speed equivalent), 10W30 oil, room temp, Melling HV pump; (It might be a bit less running as the oil thins with temp and gets flung out of the journals at higher RPM's.) So 10 psi does seem low at idle for a new build.

Were the lifter bores checked for wear? Lifters loose in the bores? Original lifter bore size should be .905"-.9055".

 

[mderoy340]

The side clearance is due to the Eagle rods, not the crank journal width. Their big ends are about .010-.012" narrower than stock big end widths. We put some SCAT rods in our 340 with a 273 crank and we got about the same side clearance as you: .026". The SCAT and Eagle I beam rods big end widhts are both .925".) That larger side clearance did not look to effect oil pressure: we had 67 psi at 600 rpm priming speed (1200 RPM crank speed equivalent), 10W30 oil, room temp, Melling HV pump; (It might be a bit less running as the oil thins with temp and gets flung out of the journals at higher RPM's.) So 10 psi does seem low at idle for a new build.

Were the lifter bores checked for wear? Lifters loose in the bores? Original lifter bore size should be .905"-.9055".

Also check the engine serial # pad for a diamond shape stamping. If it's there your block came from the factory with one or more lifter bores oversized.

 

[mbaird]

Are you hearing a TICK..a TAP... or a KNOCK ?

 

[drawson]

Hats off to GeorgeH , Even though I hit 55 this year I still say I work best under adult supervision, reset to 1/2 turn , she did not like that , reset at 1 turn from zero lash and started it , still noisey, then I saw it... pulled the fill cap and noticed the baffle moving !!!!!!, GeorgeH called it, the small baffles were getting hit by the adjuster bolts, 1 in each v/c, screws had loosened up and luckily had not fell out , trimmed baffles with cut off wheel, locktighted screws and it runs quieter than it ever has, valve train has noise but nothing out of the ordinary for that many moving pieces, yesssssssssssssssss Thank's GeorgeH

 

[GeorgeH]

Glad you got that sorted. Easy to overlook the simple things sometimes.

 

[nm9stheham]

LOL, that part was easy. Thanks for updating everyone.