47-59 How much oil should be lubricating the top end of a 235? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

daveshilling · 07-23-2021, 12:59 AM

Tonight I was able to plug the filter holes and use a drill to test the oil flow to the top end of my 235 by putting a screwdriver end into the distributor hole and spinning the drill.

Oil came out of each hole in all six rockers slowly. It didn't squirt, just sort of slowly bubbled out Then I realized... I don't know how much oil should be coming out. I've never seen a fresh engine do this test.

I assume my drill is spinning slower than the distributor will, so maybe I never will truly see the correct amount, but is a small bubbling up of oil on each rocker good enough for this test so I can start putting things back together?

_Ogre · 07-23-2021, 12:54 PM

235 lifters should be hydraulic, the cam needs to be spinning to pump oil thru them

daveshilling · 07-23-2021, 03:06 PM

Quote:

Originally Posted by _Ogre

235 lifters should be hydraulic, the cam needs to be spinning to pump oil thru them

I was just looking at the holes in the top of the rocker arms as reference in this case. There were some oil passage changes in 58-59 I think.

Divine 59 · 07-23-2021, 06:44 PM

When I adjusted the valves on mine it was slinging oil and making a mess, but it was running, not using the method you used.

Bimus · 07-24-2021, 12:02 AM

When working 235 engines the cars with automatic transmissions had hydraulic lifters factory in pickups the 235 I found solid lifters maybe factory or maybe not . Solid lifters do add more torque . The 216 for the most part the oil pump only pumps oil to the rocker arms at about 14 psi and when setting the valves it makes a mess .
I have one 235 engine that looks like some one added a fitting to the top of the valve cover to get more oil to the top end and I have never taken the valve cover off to see what it really is .

07-23-2021, 12:59 AM	#1
daveshilling Registered User Join Date: Jan 2013 Location: roseville Posts: 823	How much oil should be lubricating the top end of a 235? Tonight I was able to plug the filter holes and use a drill to test the oil flow to the top end of my 235 by putting a screwdriver end into the distributor hole and spinning the drill. Oil came out of each hole in all six rockers slowly. It didn't squirt, just sort of slowly bubbled out Then I realized... I don't know how much oil should be coming out. I've never seen a fresh engine do this test. I assume my drill is spinning slower than the distributor will, so maybe I never will truly see the correct amount, but is a small bubbling up of oil on each rocker good enough for this test so I can start putting things back together? __________________ My Current Trucks: 1958 Apache BBW 4.8LS/4l60 "Lucky" Built By Me 1958 GMC BBW LS1/4l60 "The Kraken" Built By Delmo

07-23-2021, 12:54 PM	#2
_Ogre Registered User Join Date: Jan 2012 Location: Motown Posts: 7,680	Re: How much oil should be lubricating the top end of a 235? 235 lifters should be hydraulic, the cam needs to be spinning to pump oil thru them __________________ cool, an ogre smiley Ogre's 58 Truk build how to put your truck year and build thread into your signature shop air compressor timer

07-23-2021, 06:44 PM	#4
Divine 59 Registered User Join Date: Sep 2011 Location: Austin, TX Posts: 307	Re: How much oil should be lubricating the top end of a 235? When I adjusted the valves on mine it was slinging oil and making a mess, but it was running, not using the method you used. __________________ My Build Thread http://s95.photobucket.com/user/drop...?sort=3&page=1

07-24-2021, 12:02 AM	#5
Bimus Registered User Join Date: Dec 2018 Location: Farmington NM Posts: 112	Re: How much oil should be lubricating the top end of a 235? When working 235 engines the cars with automatic transmissions had hydraulic lifters factory in pickups the 235 I found solid lifters maybe factory or maybe not . Solid lifters do add more torque . The 216 for the most part the oil pump only pumps oil to the rocker arms at about 14 psi and when setting the valves it makes a mess . I have one 235 engine that looks like some one added a fitting to the top of the valve cover to get more oil to the top end and I have never taken the valve cover off to see what it really is .



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