C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Melling Oil Pump Cracks

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Old Jun 19, 2007 | 03:44 PM
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Default Melling Oil Pump Cracks

there was a thread here the other day about cracked M55HV pumps, here is the new one i got today, it even comes with a note saying "the pump has a new look due to a new housing & cover design, the changes inprove the pump on origional stock applications". but it also says...."any high performance application especially those using solid motor mounts require the installation of an M select performance oil pump".....ok......what is that? and why did this one cost $85??
but you can see by the pics..this one IS better though.

here is the pic http://www.billybonesmusic.com/billsvettepage.htm
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Old Jun 19, 2007 | 04:54 PM
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The Select pump cost about $85. If you paid that for a standard, you got ripped off!!!!! Do yourself a favor & buy the select pump. It would be like buying insurance & peace of mind.
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Old Jun 19, 2007 | 05:53 PM
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this was the pump/pick-up assy welded on with hardened pumpshaft kit from summit, so thats why its more, this pump is solid though. its been changed,
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Old Jun 19, 2007 | 06:08 PM
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But the included warning should give you a clue to what may happen. Hopefully nothing, but if you have a high performance engine, is it worth the chance?
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Old Jun 19, 2007 | 06:13 PM
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the housing will crack on that pump hense the warning,i read an article in last months hotrod about this,you dont want that pump on a high perf. engine like 85 vet said do yourself a favor and return it to summit.I just bought the select pump and it was 62 dollars with out the pickup.
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Old Jun 19, 2007 | 06:26 PM
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what is the part number on that select pump?
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Old Jun 19, 2007 | 06:40 PM
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Originally Posted by billybonesmusic
what is the part number on that select pump?
Because of this question, I typed a guess at an address (URL) into the address bar of my browser. I didn't explore beyond the opening page, but I'll bet that everything you ever wanted to know about Melling, can be found HERE.

RACE ON!!!
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Old Jun 19, 2007 | 07:09 PM
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Default here is the original tip

This is the guy the wrote into the magazine, it was a long time ago -look how long it took to make it to actual print

Ed Hess melling thread at GoDragracing.com
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Old Jun 19, 2007 | 08:23 PM
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10552 for the high volume pump from jegs.
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Old Jun 19, 2007 | 09:20 PM
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Originally Posted by 85vet
The Select pump cost about $85. If you paid that for a standard, you got ripped off!!!!! Do yourself a favor & buy the select pump. It would be like buying insurance & peace of mind.


to make a long storey short. i ended up puting in the 10555 in my 383

Last edited by jeffyc; Jun 19, 2007 at 09:22 PM.
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Old Jun 25, 2007 | 07:01 PM
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I dont't know exactly which pump I have. I think it is a 10550.
Would this pump be OK for a high perf. engine with big hp/tq and a 6000 rpm readline?

It looks like the right one in the picture, btw.


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Old Jun 25, 2007 | 09:09 PM
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I went with the std volume 10553.

However, look for that thread "melling oil pump disasters" it has several pages of good info. Including several pics. IIRC, you may actually have an older style good pump. At first glance, your mount area looks pretty beefy and does not have the sleeve of the newer weak style.
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