PA 501 Brass 134-165 GPH 1/2" NPT Rotoflow Fluid-o-Tech Rotary Vane Pumps

Marsoni

M251S

$109.09

Get it in 3 business days with 1 day shipping. Friday, May 29

PA 501 Brass 134-165 GPH 1/2" NPT Rotoflow Fluid-o-Tech Rotary Vane PumpsPA 501 Bypass Clamp Mount Brass 134 165 GPH 2. 23 2. 75 GPM 1 2" NPT Rotoflow Fluid o Tech Rotary Vane Pumps. Part # Bypass Mount Body 1450 RPM 1725 RPM Req. HP @ 200 PSI 100 PSI 200 PSI 100 PSI 200 PSI GPH LPH GPH LPH GPH LPH GPH LPH PA 501 Yes Clamp Brass 139 526 134 507 165 625 159 602 3 4 FOR QUANTITY PRICING AND ORDERS OUTSIDE THE CONTIGUOUS U. S. PLEASE CONTACT US FOR A QUOTE! The PO 500 1000 series positive displacement rotary vane pumps are

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So my 2005 Durango has a 5.7 and I put on 253,000 miles on it before it blew a head gasket. Since it was summer, iI decided I'd tackle it myself. The upper end was so full of gunk, I can't believe I hadn't had serious issues. Anyway, I apparently dropped some pieces of crud down the oil channels, 'cuz after putting it all back together, I got alarms for low oil pressure. Figuring I'd try anything else before replacing the oil pump, i gave this stuff a try. WOW!!!! Not only did the oil pressure return, the engine runs SO much smoother! I had forgotten how smooth it ran when it was new. The caveat is that apparently the gunk was the only thing keeping some areas from leaking - as it lost oil at a startling rate. 1 bottle of the Liqui Oil Saver though, and within a week the oil leaks completely stopped.

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Reviewed in the United States on November 8, 2025

Verified Purchase

Marlana Lupo

Boise, US

★★★★★ 5

Awesome!!

Had a check engine light come on for cam shaft position. Did some research online about the specific code and found that I could be due to sludge in the engine. Added this and ran for about 30 minutes and then had the oil changed. The light never came back on and the engine is running smooth and quiet. Will definitely use again.

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Reviewed in the United States on April 5, 2026

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Discovery

Grantham, US

★★★★★ 5

Great product

This brand is great. The car is running great

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Reviewed in the United States on March 4, 2026

Verified Purchase

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