engine kits 4.0
Lead Driver
Joined: Sep 2003
Posts: 7,017
Likes: 209
From: SoCal
Originally Posted by Pablo-UA
What a reason to replace Cam.... Usually there are problems with cam bearings, really dificult to replace.
Post Fiend
Joined: Apr 2005
Posts: 5,720
Likes: 5
From: Washington state
check all the roller lifters for wear and wobble of the roller and the barrel for wear O.D. .....check the cam lobes for roller grooving wear ....mic the lifter holes for roundness and I.D.
lifter holes commonly wear oval in 4L Ford OHV
buy a kit with premium brand name parts....cheap is not cheap when rebuild fails after 2 months
lifter holes commonly wear oval in 4L Ford OHV
buy a kit with premium brand name parts....cheap is not cheap when rebuild fails after 2 months
Elder User
Joined: Apr 2005
Posts: 882
Likes: 0
From: Wichita
The bottoms of lifters wear with the cam lobes. You can reuse lifters and cam as long as you keep the lifter and lobe together. You can reuse the cam with new lifters but never use a new cam with old lifters. The worn "cup" on the base of the lifter will wear out a cam quicker. I always replace cam and lifters in a rebuild. It's not that expensive.
Also roll your pushrods on a flat surface to make sure they are not bent and look at your rockers for wear. Any wear in the "system" affects the valvetrain geometry which could net less than optimum performance.
Also roll your pushrods on a flat surface to make sure they are not bent and look at your rockers for wear. Any wear in the "system" affects the valvetrain geometry which could net less than optimum performance.
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Postmaster
Joined: Sep 2003
Posts: 4,452
Likes: 1
From: Southern California
Vango:
The 4.0L uses roller lifters, not the regular type of lifters. Very expensive to replace.
The 4.0L uses roller lifters, not the regular type of lifters. Very expensive to replace.
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Elder User
Joined: Apr 2005
Posts: 882
Likes: 0
From: Wichita
Yeah, I guess a set would run around $450. You could stick with my first comment about keeping them matched with the cam lobes and hope that the roller ends still have life in them. If the cam lobes are worn, it's your call on the lifter.
Traditional teaching said that if the lifter base is cupped indicating wear, you should replace them. It isn't life threatening though - just thorough. To check for cupping, set the lifter on a straightedge and look for daylight.
Traditional teaching said that if the lifter base is cupped indicating wear, you should replace them. It isn't life threatening though - just thorough. To check for cupping, set the lifter on a straightedge and look for daylight.
Post Fiend
Joined: Apr 2005
Posts: 5,720
Likes: 5
From: Washington state
if you decide to reuse the old roller lifter. keep them in the same order as they came out. lifter matched to its hole and its cam lobe
don't mix and match, this is not chinese checkers
measure the pushrods for length wear and end collapse also....
the rockers on 4L are notorious for wearing out, poor oil lube flow
use lots of engine cam shaft assembly lube on cam, roller lifters, rockers, cam bearings, crank bearing-journals, rod bearings-journals, oil pump, timing chain-gears, cam position sensor drive gears, wrist pins...
no assembly lube on rings or pistons, will never seat
start the engine and break it in on a diesel rated oil such as Rotella T synthtic 5w40, has plenty of anti wear, extreme pressure additives to prevent excessive bearing-journal and cam wear
after 1k miles, can switch to your regular car motor oil
don't mix and match, this is not chinese checkers
measure the pushrods for length wear and end collapse also....
the rockers on 4L are notorious for wearing out, poor oil lube flow
use lots of engine cam shaft assembly lube on cam, roller lifters, rockers, cam bearings, crank bearing-journals, rod bearings-journals, oil pump, timing chain-gears, cam position sensor drive gears, wrist pins...
no assembly lube on rings or pistons, will never seat
start the engine and break it in on a diesel rated oil such as Rotella T synthtic 5w40, has plenty of anti wear, extreme pressure additives to prevent excessive bearing-journal and cam wear
after 1k miles, can switch to your regular car motor oil
Last edited by 96_4wdr; Feb 13, 2007 at 07:27 PM.
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Senior User
Joined: Dec 2003
Posts: 222
Likes: 0
From: Washington State
The heads a have just been rebuilt and I have new lifters. The noise I have been hearing is diagnosed as a possible wrist pin. I'm tired of having things fixed that don't need fixed and second guessing, So I am going to pull that motor out myself have the machine work done on the block buy a kit and assemble it. So while it's out and apart it's getting a new cam also
Postmaster
Joined: Sep 2003
Posts: 4,452
Likes: 1
From: Southern California
Hi 9d4:
That's the wise thing to do. I don't really trust mechanics to work on my cars anymore.
I have a very close friend who owns a repair shop, and he has offered to do any work for me at his cost. I have always declined the offer politely, not because I don't trust him, but because I can't trust the people working for him do do as thorough a job as I do.
That's the wise thing to do. I don't really trust mechanics to work on my cars anymore.
I have a very close friend who owns a repair shop, and he has offered to do any work for me at his cost. I have always declined the offer politely, not because I don't trust him, but because I can't trust the people working for him do do as thorough a job as I do.
Posting Guru
Joined: Aug 2002
Posts: 1,041
Likes: 1
From: Orland USA
9d4:
When I rebuilt mine I orderd my Master kit from here:
http://www.flatlanderracing.com/rebuildkitsford.html
Master Engine Kits include: Pistons, Rings, Gaskets, Cam Bearings, Rod Bearings, Main Bearings, Oil Pump, Freeze Plugs, Camshaft, Lifters, Pre-lube, and Timing Set.
Good Luck,
JaY
When I rebuilt mine I orderd my Master kit from here:
http://www.flatlanderracing.com/rebuildkitsford.html
Master Engine Kits include: Pistons, Rings, Gaskets, Cam Bearings, Rod Bearings, Main Bearings, Oil Pump, Freeze Plugs, Camshaft, Lifters, Pre-lube, and Timing Set.
Good Luck,
JaY