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Re: 1988 Suburban "V Rig" Gets Cummins Power
It could also be the injection pump input shaft seal leaking which can put diesel into the crank case. If it were an injector, it would either smoke horribly, run rough, cough, and the exhaust would smell of diesel fuel bad. In the crankcase vent you can get condensation in the hose and that can make the end look milky. This is also caused by crankcase pressure, sort of aireration.
The mileage being down may be due to the 3:54's and 35's. But, if this is combined with towing, it's hard to say for sure. The auto may eat some of that too with the gears and tires. Mine is a manual and does better than yours, but while towing it does drop down.
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Ryan
1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread
1972 GMC Sierra Grande Longhorn 4x4
1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed
1972 C10 Suburban Custom Deluxe
1969 Chevy milk truck
1971 Camaro RS 5.3 BTR STG3 Cam Super T10
1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project
Tired of spark plugs? Check this out.
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