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FlowKooler pumps patented impeller designs help stop engines from overheating and reduces engine temperature up to 30 degrees by doubling the flow of coolant and building system pressure.

Home / Products / 1686 1978-1989 Chevy GMC Inline 6 cylinder 292/4.8L 3-15/16" tall water pump

1686 1978-1989 Chevy GMC Inline 6 cylinder 292/4.8L 3-15/16" tall water pump

$111.18

1686 1978-1989 Chevy GMC Inline 6 cylinder 292/4.8L 3-15/16
1686 1978-1989 Chevy GMC Inline 6 cylinder 292/4.8L 3-15/16
1686 1978-1989 Chevy GMC Inline 6 cylinder 292/4.8L 3-15/16
1686 1978-1989 Chevy GMC Inline 6 cylinder 292/4.8L 3-15/16
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1686 1978-1989 Chevy GMC Inline 6 cylinder 292/4.8L 3-15/16" tall water pump

$111.18

If you have the 1978-1989 Chevy truck with a 292/4.8L you might be finding it runs a little hotter now.  You might also find heat cycling is occurring with your riser set-up.  We designed a impeller with an increased vane count and a reduced impeller vane clearance to take care of both problem.  It achieves greater flow rates, higher head pressure and a more efficient flow and squeezes that air out of your riser casting. The impeller 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 4.8L 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 Iron
Number of Blades on Impeller 8 CNC Aluminum
Direction of Rotation CW
Fan Hub Working Height 3 15/16"
Bypass hole yes
Hose Connections: 1st 2nd
Gender M NA
Diameter 3/4" NA
Threaded No NA
Other Special Features:
  • 8 vane CNC Machined aluminum impeller
  • Protected from corrosion with a military grade surface coating
  • Fits Chevrolet Suburban, GM Suburban applications
  • If your hub height measures 3 7/8" tall - see pump 1777cw
  • If your hub height measures 4 1/4" tall - see pump 1687
  • Alternative Part Numbers  10046305, 10112692, 12523505, 465802, 474055, 88412818, 93412618
Parts Contained in Box:
Mounting Gaskets,Installation Sheet, FlowKooler Decal
Make Model Year Block CID Liters
chevrolet c20/c2500 pickup 86-78 L6 292 4.8L
chevrolet c2500 suburban 86-78 L6 292 4.8L
chevrolet c30 pickup 86-78 L6 292 4.8L
chevrolet g20/ g2500 van 1978 L6 292 4.8L
chevrolet g30/ g3500 van 1978 L6 292 4.8L
chevrolet k20/k2500 pickup 86-78 L6 292 4.8L
chevrolet k20/k2500 suburban 86-78 L6 292 4.8L
chevrolet k30/k3500 pickup 86-78 L6 292 4.8L
chevrolet p10 van 80-78 L6 292 4.8L
chevrolet p20 van 89-78 L6 292 4.8L
chevrolet p30 van 89-78 L6 292 4.8L
chevrolet r30/r3500 pickup 1987 L6 292 4.8L
gmc c25/c2500 pickup 86-78 L6 292 4.8L
gmc c25/c2500 suburban 86-78 L6 292 4.8L
gmc c35/c3500 pickup 86-78 L6 292 4.8L
gmc g25/g2500 van 1978 L6 292 4.8L
gmc k25/k2500 suburban 86-78 L6 292 4.8L
gmc k35/k3500 pickup 86-78 L6 292 4.8L
gmc p15/p1500 van 80-78 L6 292 4.8L
gmc p25/p2500 van 89-78 L6 292 4.8L
gmc p35/p3500 van 89-78 L6 292 4.8L
gmc r3500 1987 L6 292 4.8L

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1686 1978-1989 Chevy GMC Inline 6 cylinder 292/4.8L 3-15/16
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1686 1978-1989 Chevy GMC Inline 6 cylinder 292/4.8L 3-15/16
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