Re: lifter replacement
birdy, my recommendation fwiw would be to put a nice amount of assembly lube on the face of the lifter which rides the cam and install. Ideally you'd want to spin the oil pump of the motor before starting to prime that cam/lifter area, but it's not absolutely necessary.<br />In short, new cam requires new lifters. Old cam can always use new lifters but their is a break-in procedure just like when it's a new cam. Used lifters should only be used with cam they came off of and used back on the same lobe because of the wear pattern that's establised between that lifter to it's cam lobe.<br />Chevy hi-perf magazine this month just happens to have an article talking about valvetrains, and they state that builders are using 15w-40 diesel rated oil for engine break-in specifically for the lifter/cam surfaces since the oils today are weak in the anti-wear department because of epa mandates on emissions. The diesel oils like chevron delo, mobil delvac, and most others carrying a CH-4 or CI-4 rating have the higher anti-wear additives. I would caution you though if using a 15w-40, you want to get the best oil flow on startup so if your outside temps are > 70F then no problem, otherwise look for a 5w-30/10w-30 CI rated oil, the easiest to find is probably motorcraft by ford, I know all their diesels are now running that viscosity. You only want to run the motor in on this oil for the first couple hours for the break-in then change to your regular oil. You'll want to change the oil soon after anyway to remove wear metals that were generated from the breakin. Don't forget once started, get it to 2000+ rpms to break in the new lifters! <br />-------------------<br /><br />Must new (Standard Design) lifters always be installed on a new camshaft?<br /><br />YES! All new standard hydraulic and mechanical camshafts must have new lifters installed. The face of these lifters have a slight crown, and the mating lobe surface they ride on has been ground with a slight taper. The purpose of this is to create a "spinning" of the lifter as it rides on the lobe. This is necessary to prevent premature wear of the lifter and lobe.<br /><br />Therefore, these parts will be mated to one another during the initial break-in period. Used lifters will not mate properly, causing the lobe to fail. If you are rebuilding an engine and plan to re-use the existing cam and lifters (in the same block) it can be done, as long as the lifter goes back on the same lobe it is mated to. To keep your components in order, a Crane Cams "Organizer Tray" part number 99015-1 would be helpful. If the lifters get mixed up, they cannot be used, and a new set will be required. The new lifters would also have to go through the break-in procedure to mate to the old cam.<br /><br />Can used Roller Lifters be installed on a new camshaft?<br /><br />YES. "Roller" lifters are the only ones that can be re-used. This design lifter has a wheel (supported by needle bearings) attached to the bottom of it. The lobe the roller lifter rides on does not have any taper. This is a very low friction design and does not require the lifter to mate to the cam. As long as the wheel shows no wear, and the needle bearings are in good condition, the "hydraulic roller" or "mechanical roller" lifter can be re-used.<br /><br />
http://www.cranecams.com/?show=faq&id=2
