5.4 l swap or repair
#1
5.4 l swap or repair
So here's the deal. Timing guide broke. Rode the chain up and pushed thru the valve cover on passengers side. If I were to repair I'd do everything in the timing cover the pumps guides chains and phasers. But is it worth it with the possible internal damage or should I swap motors
#3
Mileage is 190xxx. Service history is just the basic tune ups, fluid changes etc. I haven't haven't cracked it open to look inside yet so I can't say anything on that part of it. In the almost four years I've owned it I've had no big issues. Haven't had to do the alternator the starter, nothing but the battery was gonna need a change by this coming winter. Only rust on anything is the rear bumper and around the gas lid
Last edited by Eddie Cohoon; 07-22-2017 at 01:04 PM.
#4
LightningRod
If the rest of the truck ( Trans, body, interior )is in good shape and you want to keep it, here's what I would do.
Put some DUCK tape over that hole in the VC. Screw a manual aftermarket oil pressure gauge in the Oil pressure switch hole. (leave pressure switch out knowing you will get a DTC). Start it up and let it idle (Not drive it) for maybe an hour or even two hours. These trucks will run fine with busted guides. Run it until the engine and oil is at max operating temperature. Assuming it has decent oil pressure (ie: about anything above 12-14 lbs at hot idle in gear), I would shut her down, pull all the spark plugs and do a compression check recording each. The next morning, I would do another compression test cold / dry and record each.
If the compression readings across all cylinders are within 10% of each other, and no cold / dry readings exceeds 10% of its corresponding hot compression reading, I would repair it replacing everything under the FC, including oil pump.
These trucks will run fine with busted chain guides. I suspect mine did (not intentionally) for probably 10-20k miles before tearing it down at 212k after doing the above tests. The engine is as strong as when it was new.
BTW - when I tore mine down at 212k, EVERYTHING on the front was original, including all sensors, tensioners, alternator, WP, PS, A/C comp, belt - EVERYTHING.
If you do the job DIY, you have plenty of help available here.
Good luck
Put some DUCK tape over that hole in the VC. Screw a manual aftermarket oil pressure gauge in the Oil pressure switch hole. (leave pressure switch out knowing you will get a DTC). Start it up and let it idle (Not drive it) for maybe an hour or even two hours. These trucks will run fine with busted guides. Run it until the engine and oil is at max operating temperature. Assuming it has decent oil pressure (ie: about anything above 12-14 lbs at hot idle in gear), I would shut her down, pull all the spark plugs and do a compression check recording each. The next morning, I would do another compression test cold / dry and record each.
If the compression readings across all cylinders are within 10% of each other, and no cold / dry readings exceeds 10% of its corresponding hot compression reading, I would repair it replacing everything under the FC, including oil pump.
These trucks will run fine with busted chain guides. I suspect mine did (not intentionally) for probably 10-20k miles before tearing it down at 212k after doing the above tests. The engine is as strong as when it was new.
BTW - when I tore mine down at 212k, EVERYTHING on the front was original, including all sensors, tensioners, alternator, WP, PS, A/C comp, belt - EVERYTHING.
If you do the job DIY, you have plenty of help available here.
Good luck
#5
05 5.4l 3v s.crew lariat
Well get that valve cover off and inspect cams /heads
Get oil pan off, clean out plastic and inspect bottom end .Look for metal filings. Doing a good timing job runs around $ 1400 in parts . Are you capable/willing to do the job yourself? New reman installed $7500. Damaged cams etc .that would be a reman for me .
If you have hire it done reman is probably your ticket . Me I rebuilt mine at 130k . Are you going to keep the truck for 5 years or so ? How are you gonna feel if you need a $2500 trans rebuild ?
New trucks are so expensive the interest alone will pay for a lot of repairs on this one . Realistically you can probably get 300k -350k but I doubt more on this old engine. Forget used engines they are way too expensive and have 125k mi and up .
It's your dice roll'em .
If you have hire it done reman is probably your ticket . Me I rebuilt mine at 130k . Are you going to keep the truck for 5 years or so ? How are you gonna feel if you need a $2500 trans rebuild ?
New trucks are so expensive the interest alone will pay for a lot of repairs on this one . Realistically you can probably get 300k -350k but I doubt more on this old engine. Forget used engines they are way too expensive and have 125k mi and up .
It's your dice roll'em .
#6
Mark
iTrader: (1)
With 200k on that motor.. if it were me.. reman all the way. Start fresh. $2500-3K for fixing a motor with 200K on it. Reman is $2k more.
#7
Renaissance Honky
Eh....
Pull covers off and Plasti-Gauge the cam caps. If they're good, do all the timing gear and get a new valve cover. If more than a couple on the passenger side are pushing the 'loose' side of the spec, maybe replace that head. Maybe get the other head a valve job while you're at that. If...
If the engine's had regular oil changes, the bottom end is fine.
You can do all the timing stuff for about a Thousand + tools. I did, and will share my recipe if you want.
Pull covers off and Plasti-Gauge the cam caps. If they're good, do all the timing gear and get a new valve cover. If more than a couple on the passenger side are pushing the 'loose' side of the spec, maybe replace that head. Maybe get the other head a valve job while you're at that. If...
If the engine's had regular oil changes, the bottom end is fine.
You can do all the timing stuff for about a Thousand + tools. I did, and will share my recipe if you want.
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#8
Monks
I would also do this. Sounds like the rest of the truck is in great shape, why not put another 200k on it? Rebuilding the current one will be a lot of work and there will always be that "what if I didn't do x" feeling. I'd rather spend a little more, get a warranty, and enjoy my truck.