2012年12月4日 · I was wondering if anyone knows the specs for the valve recess from the cylinder head deck... my head just got surfaced .008", but it's not the first time it's been …

2013年5月10日 · I set the recession of the valve to .035 so that way when it's milled, the recession will be around .030-.032". The specs are .013"-.027" but there's been reports by …

2012年1月24日 · Valve Seat Alloys. Every valve seat supplier makes a big deal about the advantages of their proprietary alloys. And rightly so. The strength, hardness, wear resistance …

2019年2月22日 · Full rebuild heads get seats intake and exhaust, along with new valves. Be sure to check pushrod/lifter preload as they are often close to being bottomed out. Use the .059" …

2017年3月7日 · All direct-injected Deere diesels got set with the valve-head depth (not valve seat recession) with the intakes at .030" and the exhausts at .050". We used to be able to get …

2015年11月13日 · All valves were below spec coming in between .009 and .012 of valve recession. He now has to recess the valves back into the heads. I just wanted to put this out …

2015年6月25日 · For those of you not familiar with valve recess, there is a spec for the amount of recess from the fire deck (surface) down to the valve head fully seated. It is .013-.027” (we use …

A valve recess is a recess in the piston head. Since diesel engines have high compression ratios and small gaps between pistons and cylinder heads, they are provided with valve recesses to …

2018年6月18日 · A valve seat must actually do several things – it must support and seal the valve when the valve closes, it must cool the valve, and it must resist wear and recession. …

2015年8月1日 · Gave the heads to my machine shop and told him to deck, check thickness and valve recession. Says he took off .005 and were all good. Put back together and torque down, …