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Old 08-11-2019, 11:47 AM   #2 (permalink)
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Tommygunner's Avatar
Join Date: Feb 2010
Location: Northesat Nevada
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IIRC They upgraded the pump in 97 to a high volume pump because of the oil squirters in the 506 engines, that weren't in older 6.5s. 96 was a change over year. some trucks got 506 blocks, some got older version without high volume pump & squirters. You could try changing out the pump to the proper year for your engine (99). Hope it helps. Also normal pressure for oil squirter blocks runs lower than earlier blocks. Normal pressure when warm, is around 20 at idle, 40-50 at cruise RPM.
I hope you fully primed the lube system before starting up the new engine. If not, your cam bearings are most likely toast.

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1998 GMC K1500 WT, 6.5 TD. 80,000 miles. Auto, 3.73 gears. Remote PMD mounted on the radiator support. KOJO tune WOW! Carter HD lift pump. Feed the beast, GM8 turbo with Hurricane impeller. K&N filter. Ported, gasket matched upper intake. Leroy's braded stainless steel oil lines.
New Bosch injectors. Flow matched 2200 lbs pop
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Last edited by Tommygunner; 08-11-2019 at 11:58 AM.
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