SKU: 25074415681

1621 1973-1987 Buick Cadillac Chevy GM Olds Pontiac Grand National 196 231 350 4.5" water pump

Sale price$116.10 Regular price$129.00
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Description

1621 1973-1987 Buick Cadillac Chevy GM Olds Pontiac Grand National 196 231 350 4.5" water pumpFlowkooler high flow pump 1621 has a 16 vane CNC machined billet impeller. It is shrouded and ported and, with the increased vane count and a reduced impeller clearance, it really pumps the coolant. It achieves greater flow rates, higher head pressure and a more efficient flow. The impeller's color is due to Type II Class II military grade surface coating which protects against corrosive fluids. FlowKooler introduced the first hi flow pumps and

Flowkooler high flow pump 1621 has a 16 vane CNC machined billet impeller.  It is shrouded and ported and, with the increased vane count and a reduced impeller clearance, it really pumps the coolant.  It achieves greater flow rates, higher head pressure and a more efficient flow. The impeller's color is due to Type II Class II military grade surface coating which protects against corrosive fluids. 

FlowKooler introduced the first hi flow pumps and continues to improve impeller design. Why is increased flow so important to cooling a hot  engine? Because it has been proven time and time again that reducing the cycle time between the heat source and the heat sink creates more opportunities to shed heat and drop engine temperatures.

From 0-3,300 RPM…Nothing Beats a FlowKooler!

General Specifications:
Type of Material of Pump Body Aluminum
Number of Blades on Impeller 16
Direction of Rotation CW
Fan Hub Height 4 1/2"
Shaft Diameter 5/8"
Hose Connections: 1st 2nd
Gender M NA
Diameter 3/4" NA
Threaded Yes NA
Other Special Features:
  • 16 blade CNC Machined Aluminum impeller
  • Anodized with military grade surface coating
  • Impeller chamber is directional to clockwise rotation
  • Pilot shaft extends 1" further than the flange surface
  • 86-87 Grand Nationals do not use the 33- series Robert shaw thermostat
  • See pictures that call out the casting "gusset" to be sure you get the right pump
  • Fits General Motors cars and the Buick Regal Grand National - Gasket varies slightly
  • Alternative Part Number 12307821, 1241336, 1242913, 1247079, 1257703, 25527355, 25527536, 5513111, 58114, 511556, 251174, 251639, 252582, AW1018, 71280, CWP450, 3818, 700810, P1007, 16006686, AP595, 170120, B595, P595, 98029, 143002, 1462056, 50595, P595AX, W828, P1007, 281677, 281677Q, 2282201, 18300, ELGWP1018, WP1018, 87674102902, FP1448, NP1007, WP189, 1301070, 43094, WP665A, 311020, 25527355, 25527536, 311020, HYT11020C, W1501, C301070, P1007, PW4, 43094, GWG07A, 623603, 3450, WP1354, 7093120, QAW1018, 70872, W872, 1020, PC409, 1501, WP595, 31808, FP1448, TVI1018, T4108, US1018, WH6062 
Parts Contained in Box:
Mounting Gasket, Installation Sheet, FlowKooler Decal
Make Model Year Block CID Liters
buick apollo 75-73 V8 350 5.7L
buick centurion 1973 V8 350 5.7L
buick century 77-73 V8 350 5.7L
buick century 79-78 V6 196 3.2L
buick century 81-75 V6 231 3.8L
buick electra 81-77 V8 350 5.7L
buick electra 84-80 V6 252 4.1L
buick estate wagon 1973 V8 350 5.7L
buick estate wagon 80-78 V8 350 5.7L
buick lesabre 80-73 V8 350 5.7L
buick lesabre 84-80 V6 252 4.1L
buick lesabre 85-76 V6 231 3.8L
buick regal 77-73 V8 350 5.7L
buick regal 79-78 V6 196 3.2L
buick regal 84-82 V6 252 4.1L
buick regal 87-75 V6 231 3.8L
buick grand national 87-84 V6 231 3.8L
buick riviera 78-77 V8 350 5.7L
buick riviera 84-81 V6 252 4.1L
buick riviera 85-79 V6 231 3.8L
buick skyhawk 1978 V6 231 3.8L
buick skyhawk 77-75 All All  
buick skyhawk 80-79 All All  
buick skylark 76-75 V8 350 5.7L
buick skylark 79-75 V6 231 3.8L
cadillac deville 82-80 V6 252 4.1L
cadillac eldorado 82-81 V6 252 4.1L
cadillac fleetwood 82-80 V6 252 4.1L
cadillac seville 82-81 V6 252 4.1L
chevrolet camaro 81-80 V6 231 3.8L
chevrolet caprice 85-80 V6 231 3.8L
chevrolet el camino 85-78 V6 231 3.8L
chevrolet impala 85-80 V6 231 3.8L
chevrolet malibu 83-78 V6 231 3.8L
chevrolet monte carlo 87-78 V6 231 3.8L
chevrolet monza 79-78 V6 196 3.2L
chevrolet monza 80-78 V6 231 3.8L
gmc caballero 84-78 V6 231 3.8L
oldsmobile 98 83-81 V6 252 4.1L
oldsmobile cutlass 81-77 V6 231 3.8L
oldsmobile cutlass 87-85 V6 231 3.8L
oldsmobile cutlass calais 84-78 V6 231 3.8L
oldsmobile cutlass cruiser 83-78 V6 231 3.8L
oldsmobile cutlass salon 81-78 V6 231 3.8L
oldsmobile cutlass salon 87-85 V6 231 3.8L
oldsmobile cutlass supreme 87-77 V6 231 3.8L
oldsmobile delta 88 85-77 V6 231 3.8L
oldsmobile omega 76-75 V8 350 5.7L
oldsmobile omega 79-77 V6 231 3.8L
oldsmobile starfire 1975 All All  
oldsmobile starfire 77-76 L4 140 2.3L
oldsmobile starfire 80-75 V6 231 3.8L
oldsmobile toronado 84-81 V6 252 4.1L
pontiac bonneville 1982 V6 252 4.1L
pontiac bonneville 80-78 V8 350 5.7L
pontiac bonneville 86-80 V6 231 3.8L
pontiac catalina 1981 V6 231 3.8L
pontiac firebird 1989 V6 231 3.8L
pontiac firebird 81-77 V6 231 3.8L
pontiac grand am 1979 V6 231 3.8L
pontiac grand lemans 81-77 V6 231 3.8L
pontiac grand prix 1982 V6 252 4.1L
pontiac grand prix 87-78 V6 231 3.8L
pontiac lemans 81-77 V6 231 3.8L
pontiac parisienne 85-83 V6 231 3.8L
pontiac phoenix 79-77 V6 231 3.8L
pontiac sunbird 80-76 V6 231 3.8L
pontiac ventura 1977 V6 231 3.8L
pontiac ventura 76-75 V8 350 5.7L
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 25074415681

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4.4 ★★★★★
Based on 17 reviews
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A
Verified Purchase
Alysha H.
Cuba, US
★★★★★ 5
Absolutely love this room divider!
Color: Beige, Size: 3 Panel-102‘’-Round Pad, Color: Beige, Size: 3 Panel-102‘’-Round Pad
When they say you can't see anything through it, they are correct. As you can see by the video, the cars are traveling by with the sunlight on the divider and you still can't see any cars passing nor can you see the ones in the parking lot. You can also tell it blocks out the sunlight too which is a definite plus for our store. Quality material on the divider. Material is nice and snug on the poles with no ripples. I also like the base of these, they make the divider nice and sturdy and can be adjusted if floor is uneven. Also the design of the legs allow them to go under your furniture. Also putting them together is pretty easy. Just make sure you when you are putting the poles together to make sure at the top of the pole that the indent screw hole faces out. This makes for a better look. The directions don't say which way to turn and at 1st, I had one, one way and the other was another way as both ways work that way but I wanted a uniform/better look.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 29, 2024
B
Verified Purchase
B. R. Grande
Bozeman, US
★★★★★ 4
Works well, need power tool to assemble
Color: Beige, Size: 3 Panel-102‘’-Round Pad, Color: Beige, Size: 3 Panel-102‘’-Round Pad
Sturdy enough, especially when feet are positioned for balance. Works perfectly to create a WFH “cubicle”. Can adjust the size to provide complete privacy or fold back a panel when I want more openness. The fabric panels are not perfectly taught, but pretty close. The only negative is that without my husband’s power drill/screwdriver we wouldn’t have been able to put it together. It would take the strength of Thor to do it with just a manual screwdriver.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 30, 2022
C
Verified Purchase
Cynthia Ross
Lexington, US
★★★★★ 5
Now I don't have to see the "black hole" that used to be my family room!
Color: Black, Size: 4 Panel-136‘’W-Round Pad
I have an adult child living at home and his bedroom is tiny, so he's pretty much taken over the family room. We are both much happier now that the divider is up. It is about 12 feet long and gives him privacy to watch his movies and play his video games. And I don't have to see all the shoot-em-up stuff he likes to watch. I put the divider together with just a screwdriver (not a power one, that would be nice but I don't have so I had to use a little elbow grease.) It took a couple hours. The instructions are straightforward. I did have to use my long dining room table to attach the feet to the divider panels, which was a bit tricky. But I'm really pleased with the end result. I'm NOT a handywoman, so I feel proud that I did it "all by myself." He wanted the black fabric, but I think the lighter colors would have been better for a room that gets hot in the summer. Just my opinion. Whatever color you choose, I think you'll like the end result.
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Reviewed in the United States on July 18, 2023
L
Verified Purchase
LakeOfJudea
Chelsea, US
★★★★★ 3
Busted spring on one side....
Color: Black, Size: 28-70"W x 48-120"H (Pack of 1), Color: Black, Size: 28-70"W x 48-120"H (Pack of 1)
I would have given it five stars except for the fact that 1) the instructions that come with it are miserable so you will definitely want to refer to the photos they have in the advertisement here, and 2) it appears that one of the vertical poles has a busted spring and I literally had to stuff some socks underneath it to make it hold. Definitely an eyesore, so I'm not thrilled about that. With that being said, I'm in an apartment and I don't want to drill in the walls to hang a curtain rod. My sliding glass doors have a track that I was able to get brackets that fit over the track to hold a pole, but I had one window that I could not do that with. I thought this would be an interesting way to hang curtains without doing damage. I considered those sticky tape curtain rod holders, but I was reading a lot of bad reviews about them not holding or them taking the paint off upon removal. I figured this was the better option and it gave the room some nice aesthetics because my furniture is farmhouse white wood with black iron accents, so this blended really well with the aesthetics of the room. I know that most people who did reviews used this product as its advertised to be a room divider for privacy... So I figured this is a nice way to review using this product in a different way. I just really can't stand window blinds, as they look so commercial and industrial to me... I needed a way to make the space seem more homey. While this is working fine for me, the reality is I have white lace curtains, which don't weigh much. I don't know that I could recommend this product, even though it says it can support a bit of weight, with curtains that are too heavy. Some of that, in part, is due to the fact that one of my springs is broken so it's not very stable as it is. However, even if I was not having the issue with the spring being busted on one side, I still don't think this would be good with heavy curtains (especially if you like opening your curtains frequently). It did come with curtain hooks if you have the kind of curtains that allow you to use hooks to hang them. I do not. My curtains just slide onto the pole. If they were the type that could be put up with hooks then opening and closing them would probably be easier and maybe not as big of a deal as it is for me with the type of curtains I have. I cannot comment on longevity as I just installed it today... If anything changes I will try to remember to come back and modify this review.
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Reviewed in the United States on July 6, 2025
A
Verified Purchase
Autumm Caines
Dallas, US
★★★★★ 5
Easy setup works well
Color: Black, Size: 28-70"W x 48-120"H (Pack of 1)
I love these! Have bought two so far. Easy set up and no damage to walls. Room divider or window curtains. Works great!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 6, 2026

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