Re: [Chrysler300] 413 oll pump

["Miklas" <ldmiklas@xxxxxxxxxxx>]

An oversimplified explanation is that the difference in the high pressure 
pump is simply the spring, which you could actually change to in your 
current pump. The high volume pump is usually a stock configuration with a 
spacer plate and different rotor, which is also something you can do to your 
current pump.  If the new pumps aren't that expensive, then it isn't worth 
modifying your current pump. Sometimes the high volume pump interferes with 
frame clearance ; make sure you have 1/2" addition clearance .

The high pressure pump will give you more pressure at speed, but it will not 
produce high pressure when idling in gear.

A common thought on the high volume  pump is that you won't realize the 
extra volume unless you drill out the block and install the larger oil pick 
up tube also.

My $.02

Jeff Miklas

--------------------------------------------------
From: "Bob Jasinski" <rpjasin@xxxxxxxxxxx>
Sent: Sunday, September 25, 2011 3:27 PM
To: <chrysler300@xxxxxxxxxxxxxxx>
Subject: [Chrysler300] 413 oll pump

> I think it's time to replace the oil pump in my 300G.  I'm noticing 
> pressure
> is dropping to a very low level on a hot day after a long drive while in
> gear and idling (went to the Ironstone Concours in Murphys yesterday)
>
> I looked at Rock Auto, and they list 3 different oil pumps all from the 
> same
> manufacturer (Sealed Power) and one is standard, the second is
> "High-Volume", the 3rd is "High Pressure".  Prices are only $10 more as 
> you
> go up.
>
> What gives?  Why should I go with a standard pump if the other two are so
> close in price?  Is there a problem going with a non-stock pump?  Could it
> blow out seals in an older rebuilt engine? Those in the know please share
> your knowledge on this.
>
> Thanks!
>
> Bob J
>
>
> [Non-text portions of this message have been removed]
>
>
>
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