strange noises
Lead Driver
Joined: Nov 2000
Posts: 6,636
Likes: 349
From: Albuquerque
strange noises
The metal wire retainer lifters are the cheapest you can get. The good ones will have more like a "C" clip in there.
Unfortunately if the lifter foot is bad so is the cam. If there is much damage you will have a lot of small metal particles that ciculated through the engine. I'm afraid you will have to do it all again. Not sure about the water. If it was the same cylinder it might have overpressured the head gasket.
Sorry, not good news.
Unfortunately if the lifter foot is bad so is the cam. If there is much damage you will have a lot of small metal particles that ciculated through the engine. I'm afraid you will have to do it all again. Not sure about the water. If it was the same cylinder it might have overpressured the head gasket.
Sorry, not good news.
Thread Starter
|
Senior User
Joined: Nov 2002
Posts: 316
Likes: 0
From: ca
strange noises
well i looked at the cam shaft and there is a slight wear pattern but the lobe seems to be in good order. what causes the lifter to wear so quickly in a concave pattern and how to I prevent it?
Junior User
Joined: May 2003
Posts: 91
Likes: 0
strange noises
Beartracks is correct. If the lifter is worn then you have a cam lobe that is worn also.
It may look ok, but I am sure it is not. To help convince you just get a dial indicator and another good lifter. Measure how far it travels up compared to another good lobe. I would guess that you can see the difference even without the dial indicator…
What ever you do, don’t just change the cam/lifters and call it good. You will have to get all that metal cleaned out. If you don’t you will most likely end up with bearing problems… So, you will have to do it all again….
As for the cause.. Assuming were all stock I would look at the rocker arms first….
It may look ok, but I am sure it is not. To help convince you just get a dial indicator and another good lifter. Measure how far it travels up compared to another good lobe. I would guess that you can see the difference even without the dial indicator…
What ever you do, don’t just change the cam/lifters and call it good. You will have to get all that metal cleaned out. If you don’t you will most likely end up with bearing problems… So, you will have to do it all again….
As for the cause.. Assuming were all stock I would look at the rocker arms first….
Thread Starter
|
Senior User
Joined: Nov 2002
Posts: 316
Likes: 0
From: ca
strange noises
this could linked to a mishap i had on my initial break in? i bend several push rods so only a few of the cylinders were firing. I guess my break in was botched a bit, how can I tell if the cam is still ok without removing it? i dont have the equipment or time to remove the cam
Posting Legend
Joined: Sep 2001
Posts: 30,255
Likes: 37
strange noises
Sorry but removal of the engine and a complete teardown is all you can do now!
Buy a new cam, that one is ruined. You will need new lifters also. You will also have to go thru and recheck all of your bearings since the metal from the cam could have eaten them up. Check the crank for scoring. New oil pump time. Next time follow the break in proceedure specified by the cam manufacturer, and keep it clean. The smallest little particle could have been on the cam lobe and it destroyed it. Check your valve train clearances and lifter preload. Check your rocker arms also for scoring.
Buy a new cam, that one is ruined. You will need new lifters also. You will also have to go thru and recheck all of your bearings since the metal from the cam could have eaten them up. Check the crank for scoring. New oil pump time. Next time follow the break in proceedure specified by the cam manufacturer, and keep it clean. The smallest little particle could have been on the cam lobe and it destroyed it. Check your valve train clearances and lifter preload. Check your rocker arms also for scoring.
Thread
Thread Starter
Forum
Replies
Last Post
72CC428
1967 - 1972 F-100 & Larger F-Series Trucks
1
Sep 26, 2016 05:50 PM
Jollygr33ngiant
Ford Inline Six, 200, 250, 4.9L / 300
4
Jan 7, 2016 04:23 PM
swirlparanoid
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
3
Nov 15, 2013 02:24 PM
