lifter replacement olds 350

[hoffa65]

I have a funky lifter on the exhaust side on cylinder #4, If I replace the lifters and rockers do I need to do a cam break in sequence again?

 

[fleming442]

I would think the OG cam would handle it with some break-in lube or oil. VIN 9 is a roller, so no problem?

 

[hoffa65]

I would think the OG cam would handle it with some break-in lube or oil. VIN 9 is a roller, so no problem?

74-76 motor, 8 heads. someone has been in it, it sounds like it has a small cam no lope really just a bit choppy said to be an RV cam lol, does not smoke that I can tell and has approx 130 psi across all cylinders. Was running so so with the Holley that came on it, so I switched to a know good summit carb and it ran better but still not right. Read the plugs after a few drives to work, they were lean but not glazed over. Pulled the intake, cleaned surfaces and replaced the tray, checked the timing chain back lash (very little). Set timing at 18-20 base. ported the vac advance it ran much better pulls about 15 inches at 900 rpms, still had funky valve train noise on #4. pulled the covers still had stock rocker setup on it yet and 4 was sloppy on both Int and ext, so I install a set of adjustable rollers rockers I had laying around for the other 350 build. The intake on #4 adjusted fine but the exhaust felt mushy at zero lash. turned motor over to build oil pressure up and readjusted exhaust and it felt good, did other cylinders on that bank and checked compression all good but 4 exhaust was mushy again.

I have a new set of lifters in a box so I was going to throw them it, Ill put a dial indicator on it and degree the cam and get an idea of what its got for a cam and check for any flat lobes, should have done it the first time I was in it , oh well...

 

[olds307 and 403]

If doing them all, do a full break in. I have one funky lifter as well, can hear it. I plan on finding it and replacing. I may be do a sort of break in.

 

[565bbchevy]

I wonder if it would be possible to find an identical new lifter and replace the internals of the problem one (assuming just normal wear) on the base.

 

[olds307 and 403]

Betting it is the 204/214 Edelbrock Performer cam or clone. My 76 350 had 140 to 142 psi with that cam.

 

[marcar1993]

I wonder if it would be possible to find an identical new lifter and replace the internals of the problem one (assuming just normal wear) on the base.

Been there done that, dont suggest it. I reopened the motor to replace all the lifters not much later and re break it in.

 

[hoffa65]

Betting it is the 204/214 Edelbrock Performer cam or clone. My 76 350 had 140 to 142 psi with that cam.

Do you know the lobe lift?

 

[olds307 and 403]

Lift at the cam, .280" intake and .295" exhaust. That equals .448/.472 at the valve with the 1.6 to 1 rocker arm.

 

[fleming442]

Betting it is the 204/214 Edelbrock Performer cam or clone. My 76 350 had 140 to 142 psi with that cam.

Hopefully, not ground on a Ding How core.......