oil pump problems!!
08-31-2008, 05:22 PM
#1
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Join Date: Jul 2006
Posts: 8
oil pump problems!!
ha sanyone seen a oil pump(M55) break off? It broke by the dail pin holes, the pump, screen, and oil pump rod was in the bottom of oil pan when I pulled it off. the top part of the oil pump was still attached to the block. It never made any noise, just noticed I had no oil pressure, and turned the engine off.Just wanting to know if anyone has had this happen or maybe what caused it. what it be good to go with a M55hv?
08-31-2008, 05:29 PM
#2
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RACING JUNKIE
Join Date: Feb 2004
Location: KIEFER, OK.
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Melling has been having a lot of problems with their pumps breaking off. I believe you have to go with the select pumps for the good castings. They changed the std. casting to save money I guess. Go over to speedtalk.com and do a search about it. Lots of info on them.
Curtis
Curtis
08-31-2008, 05:47 PM
#3
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Location: Orient, OH
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A friend of mine had a m55hv pump do the exact same thing. loaded it in the trailer ready to go and unladed the next week with 0 pounds of oil pressure..
Melling is just going down the crapper from what I have heard...
Melling is just going down the crapper from what I have heard...
08-31-2008, 07:14 PM
#7
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Posts: 96
oil pumps
check out these pumps from cvr they are made of 4340 steel for there housings and you can get them from competion products......http://www.cvrproducts.com/steel_oil_pumps.html
08-31-2008, 08:12 PM
#8
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Location: Tell City, IN
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Hey..Thanks Todd I have had that problem.. 
ops:
I kept replacing the pumps with the older thicker casting pumps and even a BBC HV oil pump it help up until the crankshaft twisted in Half.
I believe what was happening was the crankshaft was cracked and causing a vibration in the motor.. It was a Cast steel crankshaft.
Since then I have swapped to their recommended pump..
http://data.melling.com/Select/small_block_chevy.php
And upgraded to a 4340 crankshaft. I think I put the cast one thru more than it's share of abuse and it failed it breaking off the oil pump was a sign and I didn't want to think that. If it was mine I would have the crankshaft magged and get one of these pumps. I use the 10552's.
ops: I kept replacing the pumps with the older thicker casting pumps and even a BBC HV oil pump it help up until the crankshaft twisted in Half.
I believe what was happening was the crankshaft was cracked and causing a vibration in the motor.. It was a Cast steel crankshaft.
Since then I have swapped to their recommended pump..
http://data.melling.com/Select/small_block_chevy.php
And upgraded to a 4340 crankshaft. I think I put the cast one thru more than it's share of abuse and it failed it breaking off the oil pump was a sign and I didn't want to think that. If it was mine I would have the crankshaft magged and get one of these pumps. I use the 10552's.
09-01-2008, 05:51 AM
#9
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Re: oil pum
Originally Posted by promod45
check out these pumps there bodys are made from 4340 steel and they have billet gears, can get them from competion produts
09-01-2008, 02:11 PM
#10
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Join Date: Nov 2006
Location: NC
Posts: 557
The best oil pump on the market is a titan oil pump!! Ed at edvanced engines has em for 1/2 price to rjer's Got 1 myself from him!David, ps he's having health problems and could use to make a sale ,his articles and address is on this forum David,
