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Old 05-12-2020, 11:40 AM
63 bomb 63 bomb is offline
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Default HLA Question

I just read a thread from a while back on the OHC forums that was talking about not pumping up the HLA's before installation. The person was saying that it'll keep the valves from closing all the way if you actually prime them with oil. His suggestion was to actually drain them before installation... Is this the case?

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Old 05-12-2020, 04:04 PM
sprintbird sprintbird is offline
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I install them dry, then prime the engine by turning the pump with the distributor out. If primed correctly, the lash adjusters will fill. Then install the distributor and fire it up.

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Old 05-12-2020, 06:20 PM
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Jeff Hamlin Jeff Hamlin is offline
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X2

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Old 05-12-2020, 09:58 PM
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X3 that is how I have always done it.

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Old 05-13-2020, 08:51 AM
63 bomb 63 bomb is offline
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So, now comes the question... Do I need to take it back apart and drain them before I try and start the engine?

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Old 05-13-2020, 07:29 PM
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If they are full of oil, YES.

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Old 05-14-2020, 11:21 AM
63 bomb 63 bomb is offline
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Understood... Just to make sure that I don't have to pull the top end apart again, what's the procedure for the HLA installation? Take them out, pull out the pin in the top, depress the check valve and let them drain? Then install them with nothing more than a coat of oil on them? After that, re-assemble the top end, fill the oil pan, pull the distributor and run with a drill until I've got oil pressure before firing? Sorry for all of the questions, but this is nothing like any other engine I've built in the past. Thanks again guys.

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Old 05-15-2020, 06:43 AM
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That is correct.

Cheers.

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Old 05-23-2020, 06:30 PM
Hokie1984 Hokie1984 is offline
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I rotate the engine 90 degrees, repeat priming the another 90, repeat, etc, that way I know all the lifters are full

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