Compression Ignition Addict
Join Date: Jun 2008
Location: Silverton, OR
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Buy yourself some SCA coolant test strips. 7.3 IDI's are bored out 6.9 IDI's, so the cylinder walls are a little on the thin side. As long as it has had good SCA's in the coolant most of its life, the risk of cavitation is much less.
Other than that, have him NOT start it before you get there. You need a cold start (even if its 90* outside, once its been ran for a minute or two, it will mask over some possible bad area's). Get there, start it up. See how long it takes to fire off, should be imidiate. Check for cold start smoke, white, blue, black, grey. Grey/black is ok, the other two are kinda iffy.
Other than that, just the regular old looking overs. Ask how old the fuel system is (IP and injectors), unless they are factory grey color (stock, should know because the injector lines plus the return lines will be painted grey as well).
I love these trucks. A little underpowered, but parts are cheap, they are easy to work on (except for the space they take up under the hood), and they are reliable (if maintained properly, I mean we are talking about trucks that are at least 16 years old, as 94 was the last year an IDI came in).
1985 Ford F-250 with a 6.9 IDI/T-19 4speed 4x4
Paint, Eagle Alloys, Kelly Safari TSR's, ATS turbo, gauges
2004 Jetta TDI 5 speed
2004 2wd Excursion Limited 6.0. Testing how loyal I am to Ford
1997 Passat B4V TDI. 1 of 80 imported in 97. 50 MPG and a factory 25 gallon fuel tank!