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ChadS
04-17-2008 07:07:34
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Re: H oil pump in reply to daniel gillespie, 04-15-2008 17:46:49
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Id take the pump apart, look at the gears and the shaft for excessive wear. The pressure relief valve should move freely, and the spring should be in good condition. A superior cleaning is a must,, most major overhaul gasket kits have the oil pump plate gaskets. Put it back in there, (if it looks OK) fill it up with oil, remove the spark plugs. If its never ben cranked over being new,, Id pour oil all over the rocker arm assembly, leave the valve cover off for now,,,, with a good battery, crank the engine a few times for a few short timed spins,,, maybe 10- 15 seconds at a time,, soon, you should see the oil get up to the head and the oil running off the rockers,, you can crank on it a bit longer with the starter,, but not too much, dont overheat the starter. You can crank it for about 20 seconds,, and should see the oil pressure guage come up,,,, Ive seen readings from 40 to 70 psi, some H's had low and higher pressure setups,, older would be less pressure, newer would have more. Once you got good pressure while its cranking,, stop, and pull the oil filter off,, check for debris. Maybe even use a paint strainer/filter the oil. You will see some shavings, especially in the first 5 hours, and its best to change the oil at least 3 times in the first 10 hours of operation before it has its first full power load on the engine. Keep an eye on the head bolt torque once it has been started and warmed up, this can affect your valve lash adjustments,, and the bolt torque does loosen up till the head gasket crushes down. Check it 3 times in the first 5 hours, and everytime while its warmed up. Check the cyl pressure with a compression guage, monitor ring break in by recording previous readings at different timed intervals, when the cyl pressure levels off and stay consistant,, the rings are seating and the lash adjustments are within range to make a full power dyno pull and ready for tuning. Dont try to rush the break in period, do it easy and steady and it usually takes 10-15 hours working to see best results. Hope this helps. ChadS
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