Lifters keep collapsing wth is going on??
03-23-2013, 08:28 PM
#13
Moderator
Thread Starter
Join Date: Dec 2005
Location: Hills of California
Posts: 5,208
In the center is in the center its only as exact as my eyeball....but yes best case is I should have used a mock up lifter to help measure push rod lenght... but the result looks dead on.
03-31-2013, 04:42 PM
#14
Moderator
Thread Starter
Join Date: Dec 2005
Location: Hills of California
Posts: 5,208
Hey check this out
The above image is of the collapsed lifter. Notice the metal fragment protruding from the check valve. multiple metal fragments lodged in check valve viewable by looking down the bore.
Above image same lifter check valve removed fragments blocking check valve now visible.
above image of second lifter that was functioning normally despite the same failure of whatever the **** that metal disc thing is because metal fragments had not entered check valve.
wtf is going on??
Thanks!
The above image is of the collapsed lifter. Notice the metal fragment protruding from the check valve. multiple metal fragments lodged in check valve viewable by looking down the bore.
Above image same lifter check valve removed fragments blocking check valve now visible.
above image of second lifter that was functioning normally despite the same failure of whatever the **** that metal disc thing is because metal fragments had not entered check valve.
wtf is going on??
Thanks!
03-31-2013, 09:13 PM
#17
2nd Gear Member
Join Date: Nov 2006
Location:
Posts: 356
lifter issue?
Hi,
Two questions...
1. Given the lifters are considered quality lifters, was all of the due diligence given to PR Geo? Have you spoken with the seller/mfg.
2. Given the lifters may be China knock-offs? Poor quality?
Just asking not judging!
One does not, normally, see shrapnel in a lifter.
Good Luck!
Two questions...
1. Given the lifters are considered quality lifters, was all of the due diligence given to PR Geo? Have you spoken with the seller/mfg.
2. Given the lifters may be China knock-offs? Poor quality?
Just asking not judging!
One does not, normally, see shrapnel in a lifter.
Good Luck!
03-31-2013, 10:19 PM
#18
Moderator
Thread Starter
Join Date: Dec 2005
Location: Hills of California
Posts: 5,208
1. again what is pr geo.( pushrod geometry?) If so I asked comp how to determine if it was correct. They said color top of valve stem black with marker and roll engine over by hand ... you should have a wear mark center of the valve stem approximately .080 wide I have this its dead center and a perfect rectangle shape. I used adj pr tool to find length... It could be wrong but I dont know what I could do to make it better or determine if it was wrong. I have spoken to comp and I just found this today so I plan to speak to them further and they are still helping me out.
2. not knock offs ordered direct from comp.
shrapnel is from what appears to be a thin steel disc used to guide oil to the edge of the lifter exit on top before entering the pushrod rather than allowing it to blow straight through the center. This disc is sandwiched between a ledge inside the lifter piston (thing in top photo silver in color with hole in it.) and the cap (black in color push rod sits in it) and it got split into a lot of pieces somehow
Thanks
2. not knock offs ordered direct from comp.
shrapnel is from what appears to be a thin steel disc used to guide oil to the edge of the lifter exit on top before entering the pushrod rather than allowing it to blow straight through the center. This disc is sandwiched between a ledge inside the lifter piston (thing in top photo silver in color with hole in it.) and the cap (black in color push rod sits in it) and it got split into a lot of pieces somehow
Thanks
03-31-2013, 10:41 PM
#20
2nd Gear Member
Join Date: Nov 2006
Location:
Posts: 356
1. again what is pr geo.( pushrod geometry?) If so I asked comp how to determine if it was correct. They said color top of valve stem black with marker and roll engine over by hand ... you should have a wear mark center of the valve stem approximately .080 wide I have this its dead center and a perfect rectangle shape. I used adj pr tool to find length... It could be wrong but I dont know what I could do to make it better or determine if it was wrong. I have spoken to comp and I just found this today so I plan to speak to them further and they are still helping me out.
2. not knock offs ordered direct from comp.
shrapnel is from what appears to be a thin steel disc used to guide oil to the edge of the lifter exit on top before entering the pushrod rather than allowing it to blow straight through the center. This disc is sandwiched between a ledge inside the lifter piston (thing in top photo silver in color with hole in it.) and the cap (black in color push rod sits in it) and it got split into a lot of pieces somehow
Thanks
2. not knock offs ordered direct from comp.
shrapnel is from what appears to be a thin steel disc used to guide oil to the edge of the lifter exit on top before entering the pushrod rather than allowing it to blow straight through the center. This disc is sandwiched between a ledge inside the lifter piston (thing in top photo silver in color with hole in it.) and the cap (black in color push rod sits in it) and it got split into a lot of pieces somehow
Thanks
Sorry for the use of acronyms. Yes, push rod geometry is an important process in setting up a valve train. They (Comp) stated.080, OK. As long as that process was followed through to a successful completion, as a lot of stress can be placed upon lifers. Just as being too tight, too tight, tends to lower vacuum and stress lighter internals, as mentioned.
Good Luck!