Re: New big block oil pump problem
[Re: Twostick]
#1681871
10/04/14 07:37 PM
10/04/14 07:37 PM
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Joined: Oct 2006
Posts: 427
Sweden
Mopar Guy
mopar
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mopar
Joined: Oct 2006
Posts: 427
Sweden
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I agree whit what al is saying that the presiure valve is probably stuck in the pump  Why use a HV oil pump when they are pumping more oil that the engine needs if you are usesing half grove main bearings  i will not use that pump any more as it eats up hp and can break the drive shaft if you are unlucky and use thick oil and fill up the heads whit oil that in many cases result in emptying the oil pans on oil if you run it on the strip  a pro built engine that is used for street&strip never needs more than about 55-60 psi of oil presiure that melling set there std pumps to and that pump will give you atleast 80 psi that should be corekted by triming the spring for the valve that not so many do even in these day´s becas it can do more harm IMO 
Last edited by Mopar Guy; 10/04/14 07:51 PM.
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Re: New big block oil pump problem
[Re: Mopar Guy]
#1681872
10/04/14 09:59 PM
10/04/14 09:59 PM
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Joined: Feb 2008
Posts: 714
Central TEXAS!!!!
sr4440
super stock
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super stock
Joined: Feb 2008
Posts: 714
Central TEXAS!!!!
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yep the presiure valve is probably stuck, but my 1st thought "how big was that drill?"
Joe
Without Data, you’re just another guy with an opinion.
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Re: New big block oil pump problem
[Re: sr4440]
#1681873
10/04/14 10:31 PM
10/04/14 10:31 PM
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Joined: Mar 2005
Posts: 939
Metro Detroit
1970RT
OP
super stock
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OP
super stock
Joined: Mar 2005
Posts: 939
Metro Detroit
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Quote:
What brand of oil filter was it that failed???
It was a Microgard filter.
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no new oil pump should be installed without being disassembled and cleaned.
I talked to the engine builder and he said he did take it apart and everything looked fine, no metal shavings and nothing was stuck.
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yep the pressure valve is probably stuck, but my 1st thought "how big was that drill?"
Not sure of the drill motor output but it was a big drill.
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Re: New big block oil pump problem
[Re: 1970RT]
#1681874
10/05/14 12:15 AM
10/05/14 12:15 AM
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Joined: Jan 2003
Posts: 5,875
communist bloc of new jersey
jamesc
master
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master
Joined: Jan 2003
Posts: 5,875
communist bloc of new jersey
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Quote:
I talked to the engine builder and he said he did take it apart and everything looked fine, no metal shavings and nothing was stuck.
two most likely possibilities
1st: he lied
2nd: he doesn't know a stuck PRV when he sees it
this isn't rocket science. either the PRV is set ungodly high (not likely) or it's stuck closed
anything outside of that is remote at best
disassemble the pump entirely (EVERY piece), clean it, reassemble it making sure the PRV shuttle is free, install it, install a known accurate pressure gauge and try it again.
i once installed the PRV spring cup plug backwards in a 340 oil pump.
yea when i primed it it buried a 150# gauge and blew up the oil filter like a balloon.
i screwed up, humans do that
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Re: New big block oil pump problem
[Re: sr4440]
#1681876
10/05/14 07:20 PM
10/05/14 07:20 PM
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Joined: Jan 2003
Posts: 74,978
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,978
U.S.S.A.
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Quote:
yep the presiure valve is probably stuck, but my 1st thought "how big was that drill?"
Joe
Size of the drill wouldn't matter , the engine is going to spin the pump faster than a drill will , it's the pump valve and/or the filter.
As far as returning the MP pump  ... good luck , MP doesn't warranty performance parts, they don't even garuntee they will fit the intended application ... stage 6 heads anyone ???
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Re: New big block oil pump problem
[Re: Mopar Guy]
#1681879
10/07/14 06:29 PM
10/07/14 06:29 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
I agree whit what al is saying that the presiure valve is probably stuck in the pump Why use a HV oil pump when they are pumping more oil that the engine needs if you are usesing half grove main bearings i will not use that pump any more as it eats up hp and can break the drive shaft if you are unlucky and use thick oil and fill up the heads whit oil that in many cases result in emptying the oil pans on oil if you run it on the strip a pro built engine that is used for street&strip never needs more than about 55-60 psi of oil presiure that melling set there std pumps to and that pump will give you atleast 80 psi that should be corekted by triming the spring for the valve that not so many do even in these day´s becas it can do more harm IMO
HV pump is more trouble than they are worth.
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Re: New big block oil pump problem
[Re: Challenger 1]
#1681880
10/08/14 02:04 AM
10/08/14 02:04 AM
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Joined: Aug 2003
Posts: 43,127
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,127
Bend,OR USA
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I put a new bracket race motor together for a freind and customer, it has a new High Volume Mellings or Speed Pro pump, CRS which one  I was trying to prime it this afternoon and it wouldn't prime until I loosened the Wix oil filter and burp the air ouf of it   That has never happen to me in the past I was using a half inch drive reversible Black and Decker drill motor that I have used for years, I did fill the Wix oil filter up first before putting it on the motor, I put 10x30 wt Valvoline straight non synthetic oil in it, I usually use 5W20Wt Valvoline in most of the motors I build like this but I decided to use the 10x30 instead this time It does have narrow full groove main bearings and race rod bearings with a little over .0028 for clearances and the mains have a little over .0035 I haven't shorten the bypass spring yet,it had 70 lbs on the drill motor I'll wait to see how much pressure it has with hot oil on the dyno and go from there 
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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