You'll actually find that cam gears ( fiber ) that ran dry lasted longer The oil softens the fiber. Repco had a few test engines and proved it. Don't believe me call Clive from Clive cams he was there.
I run steel or alloy ( have more then one with double valve springs ) and make sure there is plenty of oil.
Replacing fibre timing gear help
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Brian Westlake
- Posts: 423
- Joined: Sun Jun 13, 2010 4:11 pm
- State: NOT ENTERED
Re: Replacing fibre timing gear help
Hey Grey EJ, that makes a monkey out of my theory doesnt it! Oh well, Im still not changing that fibre gear so I may end up in the Blown gear "Hall of Fame" next year. Sounds like we should take Fis EK (Steel Gear!) Anyway, I promise I will report on this forum if and when that gear goes (If the gudgeons dont rattle out first!)
Tony FibreFriendly
Tony FibreFriendly
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bakelitecow
- Posts: 30
- Joined: Fri Nov 08, 2013 6:18 pm
- State: WA
- Location: Perth
Re: Replacing fibre timing gear help
I had exactly the same problem with the key as well,... when i did mine ,... could not budge it with as much persuasion as i could ,with the engine being in the car room is limited
I ended up using a Dremel and cutting disc and ground it out ,... it was painful
Replacement keys are readily available ,.. i bought a pack of (12) - 3/4"x 3/16 woodruff ,... so if you want one could post it to you
For the lifters as eveyone says it is just carbon build up on them ,... i used Carb cleaner and sprayed it on them to dissolve it , that worked best for me
Regards
Kel
I ended up using a Dremel and cutting disc and ground it out ,... it was painful
Replacement keys are readily available ,.. i bought a pack of (12) - 3/4"x 3/16 woodruff ,... so if you want one could post it to you
For the lifters as eveyone says it is just carbon build up on them ,... i used Carb cleaner and sprayed it on them to dissolve it , that worked best for me
Regards
Kel
Re: Replacing fibre timing gear help
We ( dad and I ) changed the one in the ej when I was about 13. It went fine for many years with the replacement fibre. But then the front cam bearing spun. At that point the grey came out a red went in. So that was at a guess 5+ year on a fibre gear dad had so they will be fine for a while.Brian Westlake wrote:Hey Grey EJ, that makes a monkey out of my theory doesnt it! Oh well, Im still not changing that fibre gear so I may end up in the Blown gear "Hall of Fame" next year. Sounds like we should take Fis EK (Steel Gear!) Anyway, I promise I will report on this forum if and when that gear goes (If the gudgeons dont rattle out first!)
Tony FibreFriendly
Last year the car was passed to me, so the red came out and a grey went back in. At that point in time I thought while it's out I'll put a mild cam in. Well that plane went out the window and it's not more wild then mild. Sounds great but a bit hard to drive slowly.
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Brian Westlake
- Posts: 423
- Joined: Sun Jun 13, 2010 4:11 pm
- State: NOT ENTERED
Re: Replacing fibre timing gear help
I like the sound of that HOT EJ (I probably would like the sound of it if I heard it run!) What colour is it? (Grey?) I dont think more oil would soften the fibre cam gear but I wasnt there when Repco was testing it and I dont have vast experience with Sideplate motors, but I am always willing to embrace new points of view if they have merit. People used to say that 272 Y Blocks used to spin the cam bearings but they actually used to wipe metal into the oil hole on one side of the bearing, blocking off the feed to the rocker gear on the right side. this explains all the F600 F ord farm trucks with an oil line into the tappet cover on the right side.I guess this is totally off the subject but I thought of it when you mentioned spun cam bearing on Grey engine. When I build a bit of a Hottie for my Pink FB, I will use a steel gear with lots of oil.
Tony.
Tony.
Re: Replacing fibre timing gear help
Yep. We suspect because an oil gallery ran dry the one the feeds the oil to the front bearing the other cam bearings were fine. Suspicions lead to us not clearing out the block / sump when we changed it many years ago and eventually just blocked up.SunnyTim wrote:Cam bearing spun, wow haven't heard of that before.......GreyEJ wrote: We ( dad and I ) changed the one in the ej when I was about 13. It went fine for many years with the replacement fibre. But then the front cam bearing spun. At that point the grey came out a red went in. So that was at a guess 5+ year on a fibre gear dad had so they will be fine for a while.
Tim
Interestingly just recently my wife VY commo spun a big end and it's always been looked after and only 210,000ks
Re: Replacing fibre timing gear help
Basically yep exactly.SunnyTim wrote:A big end I can understand spinning as they are a two piece bearing shell, but a cam bearing is pressed in as a single bearing, so I am guessing it spun as Tony has suggested and blocked the oil feed hole - which would have also blocked the outward main gallery feed to the top end I would expect also....
Tim