Cavatation!!!!!!!????????
Cargo Master
Joined: Nov 2003
Posts: 2,585
Likes: 1
From: Duluth, Mn.
I'm biased towards the IDI's. Much easier to maintain, If you've got compression and fuel, you've got power. The PS's are more powerfull, but more complicated also.
My 85 IDI has more than enough power to do anything I want it to do. I can't believe the new trucks, there's more power availible than you will EVER need. 500-600 ft lbs will only be used by a select few owners, that seriously tow in the mountains.
My 85 IDI has more than enough power to do anything I want it to do. I can't believe the new trucks, there's more power availible than you will EVER need. 500-600 ft lbs will only be used by a select few owners, that seriously tow in the mountains.
Thread Starter
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Elder User
Joined: Mar 2004
Posts: 835
Likes: 0
I have to do serious towing in the mountains. But I have company f-550 for that. I dont need all that much giddy-up in my own rig. I need a good split between , price reliabilty, MPG. What make the IDI's easyer to maintain?? J.
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 15
From: Nutter Fort, WV
The simplicity of the motor. No crankshaft position sensors (common your gonna walk thing for PSD's).
No computer.
In 252,000 miles of hard work I never did anything to my 6.9 internally.
One water pump
Two alternators
Two vacuum pumps
One lift pump
I did go through glow plugs till I put them on manaul switch, that got that under control.
Not bad for the thousands of tons of rock and dirt the truck has moved in its life.
No computer.
In 252,000 miles of hard work I never did anything to my 6.9 internally.
One water pump
Two alternators
Two vacuum pumps
One lift pump
I did go through glow plugs till I put them on manaul switch, that got that under control.
Not bad for the thousands of tons of rock and dirt the truck has moved in its life.
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 15
From: Nutter Fort, WV
See the other thread about the turbo. I put up a pic of why my motor only lasted for 252K miles. I work my truck every day. I was getting concerned about reliability and oil consumption was out of control. I have snow contracts, when it snows it better be ready to go for as long as it takes. When it snows sometimes it works for more than 24 hours straight through. A gas motor is not an option for me. When I am towing our skid steer or mini excavator around I am grossing over 20,000 pounds in the mountains of WVa.
I like the turbo much better. Hauling the weight I haul around it has made a world of difference.
I am now ready for the next 250K miles.
I like the turbo much better. Hauling the weight I haul around it has made a world of difference.
I am now ready for the next 250K miles.
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Elder User
Joined: Mar 2004
Posts: 835
Likes: 0
Originally Posted by fonefiddy
One other common test is, to run the truck up to operating temp (make SURE the thermostat is open) and then open the coolant resevoir. Rev the engine to 1000-1500 RPM's, and watch the tube going into the resevior. If there are air bubbles coming out of the tube, you've got some concerns to deal with.
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 15
From: Nutter Fort, WV
If the cavatation is starting to leak compression into the coolant from the combustion chamber you will see bubbles of air coming out of the tube to the coolant recovery tank.
After it progresses to advanced stages you do not have to look closely, it will blow the lid of the recovery tank.
This could be a false alarm if the coolant was recently changed. It normally takes several hot - cold cycles to work the last of the air out of the coolant system after it is changed. A small seep in a hose can also let air into the system that will come out the same way.
After it progresses to advanced stages you do not have to look closely, it will blow the lid of the recovery tank.
This could be a false alarm if the coolant was recently changed. It normally takes several hot - cold cycles to work the last of the air out of the coolant system after it is changed. A small seep in a hose can also let air into the system that will come out the same way.
Senior User
Joined: Jan 2003
Posts: 305
Likes: 0
From: Penn Valley
Oil analysis will tell you sooner if the engine is starting to cavitate. Though in my experience most all 7.3 IDIs you will find on the used market will be cavitated or nearly so. If it is a person who knows well enough how to take care of it, then you won't find it on a car lot...they will private party sell it, that way they know they can make more money.
IDIs are outmoded anyway, the first PSDs are getting old enough now that you can afford them too.
Birken
IDIs are outmoded anyway, the first PSDs are getting old enough now that you can afford them too.
Birken
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Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 15
From: Nutter Fort, WV
Why would you want all that electronic stuff on your motor?
I am very aware that the drive train can not stand any more power than I have now.
I have never seen a Power Stroke that I though had that much more than my IDI.
I am IDI till I can not get any parts for mine.
I will probably be dead before that happens.
I am very aware that the drive train can not stand any more power than I have now.
I have never seen a Power Stroke that I though had that much more than my IDI.
I am IDI till I can not get any parts for mine.
I will probably be dead before that happens.
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