oil flow behavior Q?
Logistics Pro
Joined: Feb 2000
Posts: 3,565
Likes: 9
From: Sun River St. George
I think it is an exhaust valve for sure. Headgaskets usually burn between two cylinders and you would have two cylinders with low compression. Headgaskets also usually leak coolant into the cylinders and produce white smoke out the tail pipe. As these exhaust valves burn they drop small pieces of the valve into the cylinders. This debris can cause major damage. I would not run this engine anymore than absolutely necessary.
Senior User
Joined: Jun 2004
Posts: 264
Likes: 0
From: las vegas nv.
i read thru the whole thread and saw nothing about the fact that the bolt in the tower that the oil comes up from the head through has the shank under-cut to facilitate the flow of oil around it.if this bolt was lost or mixed up and a standard type bolt put in it's place,it will restrict the oil.i took a grade 8 bolt and cut down the shank similar to a ford bolt...and if you tend to "****-ize" like i do, you can chamfer the hole in the bottom of the tower to match up to the oil hole coming up from the head...
Thread Starter
|
Senior User
Joined: Dec 2003
Posts: 337
Likes: 0
my cousin will be doing all the engine work and replacing my old heads with a donor truck heads that are 135+ for all 8. I will mention the tower bolt to him, thats a good observation.
he watched it today and agrees the oil should be flowing more, but said on most old heads he pulls he has to clean the crud out of all the holes which makes the flow much better...
I'll have my nose in it watching so i'll keep all these things in mind... THANKS!
he said while its open he will remove and clean the lifters & all the little moving parts.
how do you know if a lifter is bad by looking at it? once its in your hand that is?
he watched it today and agrees the oil should be flowing more, but said on most old heads he pulls he has to clean the crud out of all the holes which makes the flow much better...
I'll have my nose in it watching so i'll keep all these things in mind... THANKS!
he said while its open he will remove and clean the lifters & all the little moving parts.
how do you know if a lifter is bad by looking at it? once its in your hand that is?
Post Fiend
Joined: Jan 2003
Posts: 8,600
Likes: 4
From: Iowa
Originally Posted by William
I replace lifters if the engine has more than 20-30K Miles on it. Check all pushrods for straight.
Lifters last longer than that, assuming they're in good condition. If they're not making noise I wouldn't even take 'em out.
To check if a lifter is bad, while the rocker shaft assembly is removed, just push down on each pushrod rather hard for about 5 seconds. If you can see the lifter plunger move down, that lifter is bad.
If you put new lifters in it, you have to repeat the cam break-in proceedure. If you dont remember what bore you got the lifters out of, dont put 'em back in. Get new ones.
Logistics Pro
Joined: Feb 2000
Posts: 3,565
Likes: 9
From: Sun River St. George
I agree with the exception of FE motors. Reason for installing new lifters on a low mileage engine while you have it torn down is driven by the weight and PITA factor of the intake manifold. Break in new lifters by running the engine at 1600 RPM for about 20 Minutes. This procedure guaranties a good supply of oil splashed over the camshaft while the lifters seat themselves to the camshaft. I also wanted to caution you and your mechanic to turn the engi9ne over and line up the XX mark on the vibration damper with the timing pointer. This is the position of least valve spring pressure on the rocker shaft. Valve spring pressure will bend the rocker shaft if you are not careful when you remove it. Installing new lifters in the lifter bore is also important. The oil soaked lifter should slide down the bore of its own weight, you should be able to pull the lifter up using the vacuum of oil between the lifter and pushrod end. If not the lifter bore is to tight or nicked during disassembly. Hone the bore until the lifter moves freely within it or your lifter will fail and ruin the camshaft as well.
Thread Starter
|
Senior User
Joined: Dec 2003
Posts: 337
Likes: 0
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Cargo Master
Joined: Jul 2003
Posts: 2,328
Likes: 14
From: Colorado
Here are some threads I made and learned lots from on this type of deal:
https://www.ford-trucks.com/forums/s...07#post1724307
Well I can't find my other good one I had pictures in, oh well. That's a good one anyway
https://www.ford-trucks.com/forums/s...07#post1724307
Well I can't find my other good one I had pictures in, oh well. That's a good one anyway
Thread
Thread Starter
Forum
Replies
Last Post
spongecop
1999 - 2003 7.3L Power Stroke Diesel
12
Jan 3, 2012 12:13 PM
mattthegreat
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
10
Mar 17, 2010 03:53 PM
TPM
1994.5 - 1997 7.3L Power Stroke Diesel
10
Jan 16, 2009 12:47 PM
Steve A
FE & FT Big Block V8 (332, 352, 360, 390, 406, 410, 427, 428)
12
Dec 2, 2004 10:31 PM
