High mile condition check
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Mountain Pass
Joined: Jan 2006
Posts: 162
Likes: 3
From: oregon
High mile condition check
how do I know the truck I'm looking at has a healthy motor? the seller most always tells you what you want to hear. 
A few minutes spent with a gasser and I could confidently tell you what shape its in, especially with a cold start up. check the plugs, check compression, start it , listen to the oil pressure come up, check the exhaust, go for a spin. doing this a knowledgeable guy could tell you alot about the engine.
What do you diesel guys do to determine the health of a IDI, tubos included??
specifics would be great.
A few minutes spent with a gasser and I could confidently tell you what shape its in, especially with a cold start up. check the plugs, check compression, start it , listen to the oil pressure come up, check the exhaust, go for a spin. doing this a knowledgeable guy could tell you alot about the engine.
What do you diesel guys do to determine the health of a IDI, tubos included??
specifics would be great.
Tuned
Joined: Dec 2006
Posts: 291
Likes: 4
From: houston,tx
take the cover off the air cleaner and inspect the turbo see if the inside is excesively oily or dirty, grab the center nut and see if you can detect any axial or radial play. check for alot of blowby from the crankcase. check the condition of the coolant with a hydrometer; poor coolant condition might warn of system problems.an oil sample test could tell alot too and doesn't cost what an engine would. some heavy equipment dealers have access to a lab for this
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Mountain Pass
Joined: Jan 2006
Posts: 162
Likes: 3
From: oregon
thanks Ben, this is the kind of info I need.
whats an excessively oily turbo indicate? dirty as in bad filter, or...
should the blow by be minimal, similiar to a healthy gasser?
can anyone elaborate on what the coolant and oil tests can indicate?
whats an excessively oily turbo indicate? dirty as in bad filter, or...
should the blow by be minimal, similiar to a healthy gasser?
can anyone elaborate on what the coolant and oil tests can indicate?
Posting Guru
Joined: Mar 2005
Posts: 1,701
Likes: 0
From: KY
Another thing I like to see is a good oil pressure will cranking. Not running at an idle. When ever I build an engine I never let it fire off until I get oil pressure with the starter. If you can pull a valve cover off. You will see a sludge problem or a coolant in the oil problem there if it has been around for any length of time. Nothing is fool proof and it is always a chance. I have seen new engines in trucks scatter while delivering them. Milage can be very deceiving also. It is so easy do damage an engine.
If you know gas motors then you know more about a diesel motor then you may think. Most things apply to both.
If you know gas motors then you know more about a diesel motor then you may think. Most things apply to both.
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Mountain Pass
Joined: Jan 2006
Posts: 162
Likes: 3
From: oregon
I'm headed 50mi out of town this afternoon to check out a 94 turbo with 150K (lower mi than I expected to find)
I'm gonna take a couple screw drivers and a cresent wrench, hope that will get the air boot off so I can check the turbo. Ive never even been under the hood of one of these.
any last minute advise would be great.
I'm gonna take a couple screw drivers and a cresent wrench, hope that will get the air boot off so I can check the turbo. Ive never even been under the hood of one of these.
any last minute advise would be great.
Posting Guru
Joined: Mar 2005
Posts: 1,701
Likes: 0
From: KY
Look at the normal stuff. If you see alot of wear or little nicks on the compressor side vanes then it has had dirty air run through it. That means the cylinders ate the dirt too.
Make sure the turbo spins good and free. The rotor will feel like it has alot of radial play. That is normal. When they are running oil pressure will firm it up.
Make sure the turbo spins good and free. The rotor will feel like it has alot of radial play. That is normal. When they are running oil pressure will firm it up.
Last edited by catfish101; Dec 14, 2006 at 03:53 PM.
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