Apologies for the cross-post, I posted about this in the mk1 forum but it's more of a technical engine issue so I'm bringing it here.
I took the head off because of water/oil mixing. Assumed head gasket but who knows.
I do know the valve stem seals are bad as well and I want to fix that while im in here so the springs etc are going to have to come out.
Here's the discovery:
Two of the 8 lifters are badly damaged. All of them are showing fractures areound the skirt and in some cases longitudinally up closer to the crown.
There are gouges in the aluminum of the head by the base of several of the springs - looks like the lifters have been smashing into it.
Cam is an unknown make, 272 duration and 0.412 lift. Spring are supposedly HD but previous owner didn’t provide documentation.
What would cause this? Weak springs? I hit red line once in a while but I've been doing that since purchase several years ago. This problem is new and developed since May when I opened 'er up to replace valves.
At that time it got new valves, guides, seats cut and stem seals and a valve shim adjustment.
I did not find any foreign debris in there when cleaning it this week - so it wasn't a rogue washer or anything.
Any ideas? i'm going to replace the lifters, obviously, but don't want this to happen again.
I took the head off because of water/oil mixing. Assumed head gasket but who knows.
I do know the valve stem seals are bad as well and I want to fix that while im in here so the springs etc are going to have to come out.
Here's the discovery:
Two of the 8 lifters are badly damaged. All of them are showing fractures areound the skirt and in some cases longitudinally up closer to the crown.
There are gouges in the aluminum of the head by the base of several of the springs - looks like the lifters have been smashing into it.
Cam is an unknown make, 272 duration and 0.412 lift. Spring are supposedly HD but previous owner didn’t provide documentation.
What would cause this? Weak springs? I hit red line once in a while but I've been doing that since purchase several years ago. This problem is new and developed since May when I opened 'er up to replace valves.
At that time it got new valves, guides, seats cut and stem seals and a valve shim adjustment.
I did not find any foreign debris in there when cleaning it this week - so it wasn't a rogue washer or anything.
Any ideas? i'm going to replace the lifters, obviously, but don't want this to happen again.