Description

Radiator hoses are one of those things that just wear out over time.

Common hose failure symptoms:

1. ELECTROCHEMICAL DEGRADATION (ECD)
Appearance: The number one cause of hose failure! Using your thumb and finger, squeeze the hose near the connectors, ECD initially attacks within two inches of the ends of the hose. If the ends feel more soft and mushy that the middle or if you feel gaps or channels inside the hose, it is most likely under attack by ECD.

Cause: Different kinds of metals in the cooling system generate an electrical charge, which is carried from one component to another by the coolant. This electrical charge can weaken the hose by creating tiny internal cracks in the hose.

Solution: Replace the damaged hose immediately. The best way to avoid ECD failure is to install a hose that fights ECD. Gates electrochemical resistant hoses are your best protection against electrochemical degradation.

2. LEAKAGE
Appearance: Moisture, drips or coolant bleed marks on or around the hose clamps, connectors or on the hose itself.

Cause: Insufficient clamp torque, deterioration of the hose or connector.

Solution: Re-tighten adjustable tension clamps after a brief run-in period. Alternatively, use constant-tension clamps, which automatically adjust with the heating and cooling of the system. A beaded connector offers better sealing and retention characteristics. Brass and cast iron fittings adhere to common rubber compounds after time, which reduces possibility of leaks, as does the use of sealants and viscous gels. Replace with the recommended Gates hose. Gates uses compounds that offer better resistance to the negative effects of compression set.

3. HEAT DAMAGE
Appearance: Slight swelling is one sign of internal damage. A hardened, glossy cover that is covered with cracks is a sign of external damage.

Cause: Engine heat, low coolant levels and/or temperature spikes also contribute to deterioration.

Solution: Replace with the recommended Gates hose. Gates hoses are specially designed to resist deterioration from heat.

4. OZONE DAMAGE
Appearance: Tiny, parallel cracks in the cover, usually at hose bends.

Cause: Increased concentrations of ozone, caused by pollution, attack  bonds in certain rubber compounds. Tiny cracks occur allowing contaminants to invade and destroy the hose.

Solution: Replace with the recommended Gates hose. Gates hoses are made of EPDM and are unaffected by ozone.

5. ABRASION DAMAGE
Appearance: Rubbing marks on, or damage to, the hose cover.

Cause: Abrasion damage is caused by hose rubbing against other engine parts or against objects in the environment.

Solution: Replace the hose. If the hose is resting on or will come into contact with a sharp surface, or is near a heat source, try one of the following: 1) Reroute the hose or replace/repair the hose guiders 2) Slightly twist the hose on one or both spouts to reroute the hose 3) Wrap a protective sleeve around the new hose at the point of contact. Avoid using a slit piece of an old hose, as this will negatively influence the system’s overall temperature.

6. OIL CONTAMINATION
Appearance: The hose feels soft or spongy to the touch. Bulges and swelling are readily apparent.

Cause: Oil reacts chemically with the hose compounds and weakens the molecular bonds. This causes the hose to soften, swell and separate, layer by layer, leading to failure.

Solution: Replace the hose and eliminate any source of oil. If this is not possible, reroute the hose.

 

Alternate Part Numbers: 1242011382, 1245011382, 1657134010, 1657136010, 1657143010, 1657143030, 1657164050, 4425808, 7571, 9046043005, CH808, MB906432, MH0808, 20808

GATES 20808 Specifications
Branch Quantity	0
Centerline Length (IN)	11.9
Centerline Length (MM)	302
Contains Spring	No
End 1 Inside Diameter (IN)	1.31
End 1 Inside Diameter (MM)	33
End 2 Inside Diameter (IN)	1.31
End 2 Inside Diameter (MM)	33
Material	EPDM
Modular Hose	No
Molded	Yes
Number Of Quick Connect Fittings	0

Alternate applications:

CHRYSLER	SEBRING	1995-2000
DODGE	AVENGER	1995-2000
FIAT	X-1/9	1974-1983
MERCEDES-BENZ	300D	1990-1993
TOYOTA	CELICA	1982-1986
TOYOTA	COROLLA	1984-1985
TOYOTA	CORONA	1974
TOYOTA	CRESSIDA	1983-1984
TOYOTA	PICKUP	1970-1972