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| | | | Joined: Sep 2012 Posts: 74 Shop Shark | | Shop Shark Joined: Sep 2012 Posts: 74 | Hello y'all
Im trouble shooting a valavetrain noise and removed a suspected hydraulic lifter from my 57' 235. It looks great, of course.
I've read that there is a prefill sequence but I'm not clear on how to perform it. From what I gather the lifter is assembled lightly lubricated spring first then piston then forced down to expell the air. Is that basically all? | | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | Do your lifters have a hole in the push rod seat? You may want to start by reading my blog post about hydraulic lifters.
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Sep 2012 Posts: 74 Shop Shark | | Shop Shark Joined: Sep 2012 Posts: 74 | Thanks Dave, I DID read your blog post. It was the first hit on my google search  The lifters do not have a hole in the seat and the push rods are not slotted. | | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 |
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Sep 2012 Posts: 74 Shop Shark | | Shop Shark Joined: Sep 2012 Posts: 74 | Here is a photo of the lifter and pushrod seat. <a href="http://s73.photobucket.com/user/junglejames2471/media/Mobile%20Uploads/20150829_071126_zpsb1l0sj8u.jpg.html" target="_blank"><img src="http://i73.photobucket.com/albums/i227/junglejames2471/Mobile%20Uploads/20150829_071126_zpsb1l0sj8u.jpg" border="0" alt=" photo 20150829_071126_zpsb1l0sj8u.jpg"/></a> | | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | | | | | | Joined: Apr 2005 Posts: 2,832 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 2,832 | Here is how I prime hydraulic lifters; it has worked for 60 years.
Set lifter in can and just pour enough oil into can to submerge lifter. Chuck a push rod into a drill press. Pump lifter (slowly) with drill press till bubbles stop and lifter is solid. Since 235 push rods are mushroomed on both ends a rod in the drill press would work though I use a cut in half push rod. On many new cams they recommend NOT priming the lifters to give a bit of wear in time with the lifters soft. Wasn't necessary when oil had zinc and phosphorous.
Evan
| | | | | Joined: Sep 2012 Posts: 74 Shop Shark | | Shop Shark Joined: Sep 2012 Posts: 74 | Thanks for all the help and advice you guys. Dave has suggested a modification to the pushrod seat that I'm going to try. | | |
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