Post by
float_6969 »
https://forums.nicoclub.com/float-6969-u780.html
Tue Feb 20, 2007 5:10 pm
LOL, that is true, and the whole reason for getting the lifters rebuilt was because I thought it was a problem with the lifters. After getting them rebuilt it helped a lot, but didn't fix it. I started doing some investigating and found that I have 2 pretty major oil leaks in the oil galley's feeding the head. (I saw the oil leak previously, but I thought it was coming from the valve cover gasekt so I never paid much attention to it) It also doesn't make any noise when the oil is cold. This is because the oil is thick enough that it won't push past the leaks very much and the oil pressure in the head stays up. So the problem with the lifters is a lack of oil pressure in the head in my particular instance.
One leak is at the HG on the exhaust side at the back. It leaks bad enough to actually squirt some oil onto the exhaust. The other is in the same galley, but in an exhaust bolt hole that I drilled out.
BTW, if anybody ever strips out the exhaust bolt on the top rear of the 4th cylnder, DON'T drill, tap, and helicoil it. It's RIGHT next to the oil feed for the head and when you drill it out to helicoil it, it punches a hole in the galley and you can leak oil profusely.