Long story short I wiped a lobe on my cam. (took some bad advice from a T1 builder and used lifters that were not up to the task).

Hopefully I'll be able to split the cases and just pull the cam. Obviously if I find shrapnel in the sump it'll be a total teardown and clean out. It didn't run long with the erroneous lifters so I'm hoping the collateral damage is minimal.

Not really asking for help here - just venting... Sure wish I had a spare motor with season opener in 3 weeks .. tick tock..

Thx.

Don't need to split case to pull cams. post picture of cams, oil.

Reviewing the T4 video from Raby and I don't see how the cam can be removed without splitting cases. It's been decades since I've had a pushrod engine apart. Going to have to dig out my bell bottom overalls.


Hard to take pics of the cam - my boroscope took a poop. Will pour off oil and see what settled this am. When i dropped it I didn't see any major flakes, but we'll see.

Thx.

Uhhhh, wut?

You know this is a Type IV 4-cylinder engine, yes?

you'll have to split the cases.


hey.. years ago, I lost a cam and crank on a type4
and we always use zinc oil...

my builder had a fit when I brought the motor in.
I got a nice lecture...

I had decided to go to oil changes every other event on the engine
against the directions I was given to change oil EACH event

guess what.
I now religiously follow the "every event weekend" rule
and no contaminated oil damaging parts in the last 5 or so motors
you can't be too safe
don't know your maintenance routines... but a piece of advice that has served me well
brant

Is this failure related to a conversion to T1 lifters?

To the best of my knowledge yes. I took some bad advice. It’s the second, possibly third thing he steered me wrong on. Undoing it all now.

I’m religious about fluids too. Every event. This was a mismatch of parts.

I think he mistook for a 6 (I wish..)

Sorry Charles, was thing a six.

No worries - as said, I wish.... I do have a '74 Targa 911 that will need cams, but that's a whole different ball of wax. It'll be an RS with MFI. Now that motor would be a hoot in a 914..

Well, here's the carnage...
Click to view attachmentClick to view attachment

I must say though, the T4 is a pretty easy engine to work on. Thankfully the rest of the internals look great. I'm going to give it a fresh cam and button it back up. Now I'm taking a deep dive into cam timing... I've heard for decades all about it but never actually had to do one. This'll be a great learning tool. The Webcam folks have been great too.