|
351C oil pressure
Fellas,
My Cleveland developed a knock (deep) after the first day at the track. It has a Canton RR pan, and according to the receipts, all the necessary stuff to go racing. I wasn't pushing it too hard keeping rpm at 5k or less. It was a hot day, and the pressure was at 45 lbs vs the usual 80. What is weird is now the pressure is back to 80 (it's cool again) but the gauge "flutters" at 80. I'm getting ready to tear into it...any suggestions? Thanks, GW |
Oil pressure concerns
One of the first things to check is the oil pickup tube. Often the tube will crack near a weld or on the "foot" were the screen is.
I onced experienced the very thing you speak of, it was a hairline crack in the weld itself where the foot was welded on the tube. I never suspected this. As the engine consumed a minor amount of oil due to bad valve guides the crack was uncovered intemitantly causing the oil pressure to fluctuate @ 40-50 lbs (15 lb swing) above 3500 rpm. Try incorporating an additional brace on the pickup tube anchored either in the windage tray or a main cap bolt. This was a problem in the early 289 race cars too. Good luck .........Rick Part of this was due to oil drain down |
Oil Pressure
Oil Pressure Should be measured cold and Hot.
Basically when you step on the gas and the pressure goes up then you know your clearances are O.K. www.enginefactory.com |
GW,
If you get to the point of wanting to tear down the eng, drop the oil pan first. look in the bottom of the pan for metal. remove the oil filter and carefully cut it open to expose the paper element to look for metal. Look between the connecting rods for bearing material hanging out between them. with your wrench on the damper bolt, move the crankshaft in various positions and wiggle the crank back and forth. if a rod bearing is shot, usually you can see relative movemant between the rod and the crankpin. Start there and keep us informed. sorry to hear of your troubles. :( The Cleaveland is one of my all time favorite engines. Steve |
| All times are GMT -7. The time now is 06:20 AM. |
Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
The representations expressed are the representations and opinions of the clubcobra.com forum members and do not necessarily reflect the opinions and viewpoints of the site owners, moderators, Shelby American, any other replica manufacturer, Ford Motor Company. This website has been planned and developed by clubcobra.com and its forum members and should not be construed as being endorsed by Ford Motor Company, or Shelby American or any other manufacturer unless expressly noted by that entity. "Cobra" and the Cobra logo are registered trademarks for Ford Motor Co., Inc. clubcobra.com forum members agree not to post any copyrighted material unless the copyrighted material is owned by you. Although we do not and cannot review the messages posted and are not responsible for the content of any of these messages, we reserve the right to delete any message for any reason whatsoever. You remain solely responsible for the content of your messages, and you agree to indemnify and hold us harmless with respect to any claim based upon transmission of your message(s). Thank you for visiting clubcobra.com. For full policy documentation refer to the following link: