408 teardown, pics inside
10-09-2010, 04:07 PM
#1
408 teardown, pics inside
Backstory is I was getting low oil pressure and when I cut open the filter there were a lot of metal shavings, copper colored inside. I finished putting my 5.3 back in this morning and now its time for the teardown of the 408.
All the fun in the pan...
Main caps, front on the right, need to remove the rear cover before I can take the back cap off...
Crank...
Pretty sure I found the issue....but the real question is what caused it? Bearings are clevite mb3591H
Also, its is necessary to tear down the rest since I found the bad bearing?
All the fun in the pan...
Main caps, front on the right, need to remove the rear cover before I can take the back cap off...
Crank...
Pretty sure I found the issue....but the real question is what caused it? Bearings are clevite mb3591H
Also, its is necessary to tear down the rest since I found the bad bearing?
Last edited by Atomic; 10-09-2010 at 04:30 PM.
10-09-2010, 04:56 PM
#4
You really should tear it down to the bare block, you need to check the cam bearings too. Also really needs to have all of the oil passages cleaned out by a machine shop. When you put everything back together, it would be wise to check the clearances on everything as you go. I'd have the crank checked also.
10-09-2010, 05:01 PM
#5
In the top pic, the bearing is installed backwards in the cap. Not sure if it was installed that way in the engine, or if you just set it down like that. Also, looking at the main caps, they look black. Might just be the camera lighting or something else, but if they are actually black, then they got really hot. I think I see the same thing on the block, but it's hard to tell. If the main caps got hot enough to turn black, then it's usually necessary to line-bore the main journals.
Don't just slap new bearings in it.
Don't just slap new bearings in it.
