Melling M55
03-18-2013, 11:08 AM
#1
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Melling M55
I am currently running a M55 pump it came with my motor. I took off the oil pan because the pickup fell off. I took apart the pump to check it for damage and found the impellers were chipped and damaged.
I was going to get a new one from autozone and replace the impellers or use the new pump depending on what the casting look like.
I had 45-55 PSI while cruising before and about 12 at idle even while missing the pick up.
Any reason I should not go ahead with my plan?
I was going to get a new one from autozone and replace the impellers or use the new pump depending on what the casting look like.
I had 45-55 PSI while cruising before and about 12 at idle even while missing the pick up.
Any reason I should not go ahead with my plan?
03-18-2013, 11:19 AM
#2
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Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: Melling M55
Don't worry about replacing the impellers, just replace the whole thing.
03-18-2013, 11:22 AM
#3
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03-18-2013, 11:58 AM
#4
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Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: Melling M55
There have been problems with the "cheaper" melling oil pump castings breaking in motors with decent power.
I always use the old (now new again) "heavyduty" casting pump ..
I always use the old (now new again) "heavyduty" casting pump ..
03-19-2013, 09:37 PM
#5
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Re: Melling M55
So my old casing is much thicker than the new pump. I was thinking I would just swap the spring and impellers out. Any issues with this?
03-19-2013, 10:29 PM
#6
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Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: Melling M55
Buy a NEW standard volume, standard PSI melling pump but order the heavy duty casting. Yes it will cost more but it won't break in half.
If you have a 100% stock motor, you can order the basic casting.
03-19-2013, 10:36 PM
#7
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Re: Melling M55
Sounds good thats why i asked because i did not know.
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