High Volume Oil Pump (Page 1/1)
Notorio OCT 16, 12:22 PM
In my partial 88 v6 rebuild I'm leaving the 100k miles short block alone except for timing chain (i.e. keeping cam and bearings, rod and main bearings) b/c I'm planning on switching it out to a 3.4PR short block later. My oil pan is off to replace the very leaky gasket and timing cover seals and since my oil pressure has always been a bit low I got a HV oil pump as replacement, figuring 'why not?' Now reading through some old posts I see two opinions on using a HV oil pump in this application:

1) High volume oil pan also needed due to risk of pumping sump dry
2) Standard oil pan is fine (and this is inferred by me b/c post replies don't take the opportunity to suggest the alternative).

I won't be doing any autocross or anything like that, just tooling around town. What say you to keeping the stock pan??
Spadesluck OCT 16, 01:43 PM
I used a HV Oil Pump in my fresh rebuild of my 2.8. I also home ported my heads, added a cam, springs, and rocker arms. I drove 4k miles in June of this year across 9 different states without any problems. Not saying what I did was the best thing since sliced bread but it has worked for me and I call that a win.
Notorio OCT 16, 11:59 PM

quote
Originally posted by Spadesluck:
I used a HV Oil Pump in my fresh rebuild of my 2.8. I also home ported my heads, added a cam, springs, and rocker arms. I drove 4k miles in June of this year across 9 different states without any problems. Not saying what I did was the best thing since sliced bread but it has worked for me and I call that a win.



Many thanks for that reply. That makes me feel much better. This weekend I should have the last of the parts cleaned up and ready to start putting things back together, starting with the new oil pump and oil pan.
viperine OCT 17, 04:51 PM
I am one that suggests against the high volume pump, however, there is a little more to the concept behind why I feel as I do about it.

When the engine is cold, and started up, thicker oil is slower to trickle back to the pan. You will most likely have the high volume issues when cold. I drive my cars all year round and think the worst of the damage to an engine would be in winter.

A summer cruiser might not have as much risk, but for a daily driver I would prefer that the pan never actually empties.
theogre OCT 17, 08:24 PM
HV pump may actually help or simply hind the problem(s).
http://www.fiero.nl/forum/Forum2/HTML/143051.html


quote
Originally posted by viperine:
I am one that suggests against the high volume pump, however, there is a little more to the concept behind why I feel as I do about it.

When the engine is cold, and started up, thicker oil is slower to trickle back to the pan. You will most likely have the high volume issues when cold. I drive my cars all year round and think the worst of the damage to an engine would be in winter.

A summer cruiser might not have as much risk, but for a daily driver I would prefer that the pan never actually empties.

May be a problem but What is average air temp in winter there? Then What Oil?
Because 5w-30 is rated by API for well below 0°F and most current syn oil flows better because has less or no wax problems.
See https://www.api.org/~/media...ide_english_2013.pdf for current charts

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Notorio OCT 17, 10:25 PM
OK, I see what you are saying with the risk at cold temps. Happily it rarely gets into the low 30s here in winter.