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914World.com _ The Paddock _ Cam change
Posted by: Charles Freeborn Apr 6 2021, 09:15 PM
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.
Posted by: mlindner Apr 7 2021, 03:52 AM
Don't need to split case to pull cams. post picture of cams, oil.
Posted by: Charles Freeborn Apr 7 2021, 10:11 AM
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.
Posted by: GregAmy Apr 7 2021, 10:44 AM
Don't need to split case to pull cams.
Uhhhh, wut?
You know this is a Type IV 4-cylinder engine, yes?
Posted by: brant Apr 7 2021, 11:02 AM
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
Posted by: 914werke Apr 7 2021, 11:17 AM
Is this failure related to a conversion to T1 lifters?
Posted by: Charles Freeborn Apr 7 2021, 11:27 AM
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.
Posted by: Charles Freeborn Apr 7 2021, 11:28 AM
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
I’m religious about fluids too. Every event. This was a mismatch of parts.
Posted by: Charles Freeborn Apr 7 2021, 11:29 AM
Don't need to split case to pull cams.
Uhhhh, wut?
You know this is a Type IV 4-cylinder engine, yes?
I think he mistook for a 6 (I wish..)
Posted by: mlindner Apr 7 2021, 01:36 PM
Sorry Charles, was thing a six.
Posted by: Charles Freeborn Apr 7 2021, 06:17 PM
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..
Posted by: Charles Freeborn Apr 7 2021, 08:16 PM
Well, here's the carnage...
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.
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