| From | Message |
hawkster
Dodge Dakota
JOIN HERE
7/09/2006
20:46:07
|
 Subject: cam bearings
IP: Logged
Message:
what i need to know is if you need to replace the the cam bearings can that be done with the motor in the truck or do i need to pull the motor and can this be some thing that i can do my self or do i need to take it to a machine shop if i need to take to a shop any idea on cost
|
GraphiteDak
GenIII
7/09/2006
23:07:22
|  RE: cam bearings
IP: Logged
Message:
I assume you are talking a 3.9/5.2/5.9 with the cam in the block?
Cam bearings can be a real biatch to change! You need the special cam bearing puller. You would need to remove the radiator and everything down to the timing chain cover to first remove the cam and then the bearings are challenging to get back in just perfect even with the tool. It CAN be done in the truck, but it will be difficult. Also I think the rear bearing can't be changed unless you have the rear plug pulled out form the motor which would be blocked by the tranny and flex plate, etc. SOme people have left that bearing in, but you know how that goes not doing it 100%.... a risk.
NOT an easy job and really hard if you have never done that before.
I have used the tool, and it was a pain even with an engine on an engine stand!
|
ScojoDak
Dodge Dakota
JOIN HERE
7/09/2006
23:29:42
| RE: cam bearings
IP: Logged
Message:
hawkster, just how do you know you need to replace the cam bearings?
|
hawkster
Dodge Dakota
JOIN HERE
7/10/2006
03:21:52
| RE: cam bearings
IP: Logged
Message:
well the motor i am talking about is a 5.9/360 there are a few ways to tell if the bearings need to be replaced one is to look at them and see it there is any groves or scratches in them the other way is if they fell like they have a grove or scratches in them you will want to use a rubber gloves to fell them with because it is bad to touch the bearings with your fingers because the oils your body puts out can hurt the bearing faces and another way is to measure them
|
Capt Obvious
Dodge Dakota
JOIN HERE
7/10/2006
19:20:48
| RE: cam bearings
IP: Logged
Message:
huh?
|
shatto
Dodge Dakota
JOIN HERE
7/22/2006
20:55:45
| RE: cam bearings
IP: Logged
Message:
I did exactly what Graphite Dak described.
I didn't change the rear bearing because of exhaustion, I worked under a carport in winter ( okay, winter in the Bay Area doesn't have real winter stuff, but it was windy and cold and it took me two weeks to do the job without the right tools, but I digress.) and I just ran out of gumption, poop, motivation, energy. I said screw it!
The result of replacing 3 of 4 bearings? Loss of oil pressure.
According to the real mechanics mechanical oil pressure gauge, it now idles at 8 to 10 PSI, and runs from 20 to 30 PSI. Problem? Even the new electric sending unit won't read that low, so the dash gauge reads zero and the chime chimes, at idle. But we know the truth, don't we?
No, heavier weight oil didn't correct the low pressure.
Is it important? Nah. Our engines are designed to run at those low-looking pressures.
Proof? I've been running a 27 stop 150 mile route in 100+ degree temperatures in Sacramento. Only turn it off a few times. Sat idling 45 minutes during lunch one day (103 outside, 70 inside).
No, it isn't a company car. Yes, it is mine.
|
RichmondOiler
Dodge Dakota
JOIN HERE
7/23/2006
10:56:52
| RE: cam bearings
IP: Logged
Message:
Hey Shatto! If your cam bearings were worn and you replaced 3 out of 4 bearings and lost more oil pressure, then you have more problems than the cam bearings. 3 new bearings = tighter tolerancces and overall should improve the oil pressure a small amount, not decrease it further as you state. You are always preaching about the benefits of Amsoil.......how come you needed cam bearings? Did Amsoil fail you? Something here doesn't quite add up! I smell a giant dose of bullsh*t!
|
shatto
Dodge Dakota
JOIN HERE
7/25/2006
01:03:19
| RE: cam bearings
IP: Logged
Message:
R.O.,
Someone who had replaced bearings before would have known not to replace the factory bearings which were, in fact, fine.
My oil gauge indicates 40 lbs, above idle. The mechanical gauge shows a maximum of 30 lbs. The dash gauge shows zero lbs at idle, complete with cute chime; mechanical gauge, belonging to my mechanic shows 8 to 10 lbs.
We know Dodges run at low pressures, like these.
The only thing that could account for the zero reading is the last bearing.
Is it a problem? Twice last week, I sat, idling in 100+ degree heat with the air on full blast, keeping the interior at 73 degrees. For fourty five minutes. The only thing screwed up doing this, was the gas mileage.
|
GET A NEW TRK
Dodge Dakota
JOIN HERE
7/31/2006
20:39:24
| RE: cam bearings
IP: Logged
Message:
If you truck has 500k miles on it, I DOUBT IT, then you really need a new truck dude.
|
Manny
Dodge Dakota
JOIN HERE
7/31/2006
21:31:18
| RE: cam bearings
IP: Logged
Message:
in all my years of working on engines, i have never heard of a cam bearing failure being the culprit of complete oil pressure loss.
|
shatto
Dodge Dakota
JOIN HERE
8/01/2006
01:55:18
| RE: cam bearings
IP: Logged
Message:
It now has 522,000 miles.
As long as it keeps passing smog, and doesn't collapse in a smoldering pile, we'll keep on (sorry) trucking.
|
Chris G.
Dodge Dakota
JOIN HERE
8/01/2006
03:19:30
| RE: cam bearings
IP: Logged
Message:
I drive EVERY DAY a lot and I don't see how in the past few months you have went from 500k miles to 522k miles. I think you are shooting us a line of S*it. I want to see your odometer......Let us fellow Dodge Dakota owners see... Don't even say I don't have a cam. It's easy these days to get ahold of a digital camera. BTW, my daddy is a truck driver that drives 500+ HP V6 Cummins diesel with 1800FT/LBS of torque. Yes, it's a tractor trailer. He is gone ALL THE TIME for WEEKS AT A TIME and he barely manages 20k miles in 2 months.
|
Chris G.
Dodge Dakota
JOIN HERE
8/01/2006
03:20:39
| RE: cam bearings
IP: Logged
Message:
Excuse me....correction....it's an inline 6. I'm half asleep, sorry.
|
RichmondOiler
Dodge Dakota
JOIN HERE
8/01/2006
11:27:10
| RE: cam bearings
IP: Logged
Message:
Chris G, I too am skeptical of Shatto's statements. Many times I suspect that we are victims to his story telling. While I won't come out and call his statements lies, I will say I suspect the truth is strectched to the limit. Too each his own.
|
Chris G.
Dodge Dakota
JOIN HERE
8/01/2006
15:40:51
| RE: cam bearings
IP: Logged
Message:
Now I HAVE seen diesels get way over 500k. Tractor trailer engines it is not uncommon at all, but think about their ambient RPM at 1,500 compared to our 2,100 and their lower wear due to less RPM, etc.
|
shatto
Dodge Dakota
JOIN HERE
8/02/2006
01:08:16
| RE: cam bearings
IP: Logged
Message:
How do I get the information from my scanner onto this site, please.
|
shatto
Dodge Dakota
JOIN HERE
8/02/2006
09:55:44
| RE: cam bearings
IP: Logged
Message:
Ok guys...i'm sorry. My engine really has 723,000 miles on it, just did not want to be called a liar. 100% compression too.
|
shatto
Dodge Dakota
JOIN HERE
8/02/2006
09:55:45
| RE: cam bearings
IP: Logged
Message:
Ok guys...i'm sorry. My engine really has 723,000 miles on it, just did not want to be called a liar. 100% compression too.
|
Chris G.
Dodge Dakota
JOIN HERE
8/02/2006
10:00:21
| RE: cam bearings
IP: Logged
Message:
Shatto........................dude you are full of s*it. You don't put your pic on here, you upload it to a free website service then post us the link. Also. BTW, now I know you are lying with 723k miles. Shatto. One valuable lesson. If you feel like you are in a place where you have to lie to fit in, you are in the wrong place.
|
Obio3
Dodge Dakota
JOIN HERE
8/09/2006
12:47:49
| RE: cam bearings
IP: Logged
Message:
I bet the drop in oil presure is related to improper instalatio of the replaced cam bearings. Oil holes not lined up proper or bearings not properly centered. Wrong bearings I supose is possible
It is not unusual to get an engine new from the factory with a gernal turned 10 thousands. Maybe this is no longer a practice. I'm unaware of resized cam bearings in a new engine. At least in my 40 plus shop years i never seen one. Reguardless, I would have took that engine apart before it went longer then to warm up. There is a human mistake in that engine.
So many problems .... So little time
|
| | P 1 |
|
Post a reply to this message:
Username Registration: Optional
All visitors are allowed to post messages
|
