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Engine Coolant Bypass Hose

Engine Coolant Bypass Hose (Dayco) for 1988-1991 Buick, Oldsmobile, & Pontiac NEW

$ 24 .68

Product Notes

Curved Radiator Hose

Brand: Dayco
Condition: New
See All Other Engine Coolant Bypass Hoses
LIFE
TIME
Lifetime Warranty Included
This part is backed by our industry-leading lifetime warranty. Shop with total confidence.
100%money-back 120-dayreturns OE-gradequality
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Specifications & Info


Attribute Value
.50
Centerline Length 6.38
Color Black
Contains Heat Shield N
Contains Protective Sleeve N
End 1 Inside Diameter .50, 1/2
End 2 Inside Diameter 1/2
Hose Type Single I.d. Hose
Material Epdm
SAE Specification Sae J20r4 Class D-1, Sae J1684 Type Ec
Trunk Height 6 3/8

Vehicle Fitment Guide

This part fits the following vehicles:

Buick 4 models (tapclick to expand)(tapclick to hide)
Electra 1988-1990 (tapclick to expand)(tapclick to hide)
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SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
Estate Wagon Wagon 1988 - 1989 V8 5.0L RWD Automatic
Limited Sedan 1988 - 1990 V6 3.8L FWD Automatic
Park Avenue Sedan 1988 - 1990 V6 3.8L FWD Automatic
Park Avenue Ultra Sedan 1989 - 1990 V6 3.8L FWD Automatic
T-Type Sedan 1988 - 1990 V6 3.8L FWD Automatic
LeSabre 1988-1990 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
Base Coupe 1988 - 1990 V6 3.8L FWD Automatic
Base Wagon 1988 - 1990 V6 3.8L FWD Automatic
Custom Coupe 1988 - 1990 V6 3.8L FWD Automatic
Custom Sedan 1988 - 1990 V6 3.8L FWD Automatic
Estate Wagon Wagon 1988 - 1990 V8 5.0L RWD Automatic
Limited Coupe 1988 - 1990 V6 3.8L FWD Automatic
Limited Sedan 1988 - 1990 V6 3.8L FWD Automatic
Reatta 1988-1990 (tapclick to expand)(tapclick to hide)
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SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
Base Convertible 1990 V6 3.8L FWD Automatic
Base Coupe 1988 - 1990 V6 3.8L FWD Automatic
Riviera 1988-1990 (tapclick to expand)(tapclick to hide)
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SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
Luxury Coupe 1988 - 1990 V6 3.8L FWD Automatic
T-Type Coupe 1988 - 1989 V6 3.8L FWD Automatic
Oldsmobile 3 models (tapclick to expand)(tapclick to hide)
98 1988-1990 (tapclick to expand)(tapclick to hide)
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SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
Regency Sedan 1988 - 1990 V6 3.8L FWD Automatic
Regency Brougham Sedan 1988 - 1990 V6 3.8L FWD Automatic
Regency Touring Sedan 1988 - 1990 V6 3.8L FWD Automatic
Delta 88 1988-1990 (tapclick to expand)(tapclick to hide)
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SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
Royale Coupe 1988 - 1990 V6 3.8L FWD Automatic
Royale Sedan 1988 - 1990 V6 3.8L FWD Automatic
Royale Brougham Coupe 1988 - 1990 V6 3.8L FWD Automatic
Royale Brougham Sedan 1988 - 1990 V6 3.8L FWD Automatic
Toronado 1988-1990 (tapclick to expand)(tapclick to hide)
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SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
Base Coupe 1988 - 1990 V6 3.8L FWD Automatic
Trofeo Coupe 1988 - 1990 V6 3.8L FWD Automatic
Pontiac 1 model (tapclick to expand)(tapclick to hide)
Bonneville 1988-1991 (tapclick to expand)(tapclick to hide)
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SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
LE Sedan 1988 - 1991 V6 3.8L FWD Automatic
SE Sedan 1988 - 1991 V6 3.8L FWD Automatic
SSE Sedan 1988 - 1991 V6 3.8L FWD Automatic
Verify before ordering — please confirm your vehicle's year, make, model and sub-model specifications before placing your order. If anything is unclear, our customer service team is available to help.

Policies

Shipping Information

We offer fast, reliable shipping on all orders:

  • Ships to all countries via US Postal Service Priority Mail.
  • Most orders ship within 1 business day.
  • Delivery time: 1-4 business days after shipment.
  • International shipping available, including APO/FPO addresses.
  • Tracking information provided for all shipments.
  • Additional handling fees may apply for oversized/overweight packages.

Return Policy

We want you to be 100% satisfied with your purchase. That's why we offer:

  • 120-Day Returns - Return any part within 120 days from date of receipt.
  • Must obtain RMA (Return Merchandise Authorization) number before returning.
  • Parts must be in original condition, uninstalled, unaltered, and in original packaging.
  • Important: Electrical parts are not returnable if unsealed.
  • Please inspect parts upon arrival and notify us within 5 days of receiving incorrect or damaged parts.
  • Refunds processed after warehouse receives return and credited to original payment method.

Warranty

This part comes with a limited lifetime warranty. Warranty begins on the original purchase date.

Warranty does NOT cover:

  • Shipping costs or labor expenses.
  • Installation errors.
  • Parts used for racing.
  • Commercial vehicle parts.

Interchange Parts

Brand Part Number
ACDelco 14066S
Atlas 642221
Duralast A71376
Freshstart 3032
Gates 18423
Gates 21702
Gates 21916
General Motors 25531225
Goodyear 63033

Fits Years: 1988 1989 1990 1991

Fits Models: 98, Bonneville, Delta 88, Electra, LeSabre, Reatta, Riviera, Toronado

Go-Parts Garage · Featured Guide

Pontiac Bonneville Engine Coolant Bypass Hose Replacement Guide (1986-1995)

Address coolant leaks and prevent overheating in your Bonneville by understanding this critical cooling system hose.

Read Full Guide →
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120
Day Return Window

4× the Industry Standard

Most retailers stop at 30 days. We give you a full four months to install, test, and return for a 100% refund — return shipping on us.

NEW
Direct-Fit Replacement

Engineered To OEM Specs

Brand-new aftermarket parts from trusted suppliers — built to original-equipment specifications so they fit and function like the factory unit, at a fraction of the price.

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