Question about 1998 Chevrolet K1500

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What are the two sizes of heater hose on a 98 z71 350

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5/8" &3/4"

Posted on Apr 03, 2011


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Heater hose replacement

Bob, I note you didn't actually ask a question.

If you are replacing heater hoses, you can get generic "heater hose" at any parts place. Take a sample of the old to get the right size, and cut it to fit.

Jul 09, 2015 | 2002 Mercury Grand Marquis

1 Answer


You will likely need the heater hose junction (Volvo p/n 3522035) since it always leaks and it connects the heater core to the heater hoses on the firewall. The kit usually contains the retaining clips, but not the O-rings to connect to the heater core. You will also need the outlet and inlet hoses (9186847 and 9186849). The length, angles and configuration of these hoses will help you understand their orientation in the engine bay. They can only go on one way. Else, they won't connect to the pipes from the engine.

Oct 10, 2014 | 1998 Volvo S70

1 Answer

Heater hose diagram,,,for ford econoline 4.9 liter

you don`t say what year this so I will take a stab at it. one hose is 5/8" and the other is 1/2" so the spigots on the heater core are different is size just match up sizes.

Sep 20, 2014 | Ford Econoline Cars & Trucks

1 Answer

Why is no water going throw my heater hoses

something stopped up. pull off the heater hoses where they connect to the engine. 98% sure that one or both are plugged with rust and stuff.

Dec 07, 2013 | 2002 Jeep Wrangler

1 Answer

I have a 1988 Lincoln Towncar. I am replacing the water pump, thermostat and associated hoses. It looks like the previous owner or someone before me replaced hoses at some point. However it looks like...

The bypass hose is usually different sizes on each end.
And the other small hose is usually a heater hose. It may go to the heater core, a control valve, or a metal pipe from the intake.
On some models the second tube is capped.

Aug 12, 2013 | Lincoln Town Car Cars & Trucks

1 Answer

Thermostat no heat being generated

Can try a few things. I'm going through a similar issue on my 98 dakota right now. 1. Is the temperature gauge on the dash showing the engine getting warm If not, may be the temperature sensor. Is the electric fan working right. Does it shut off or stay running? There is a relay an fuse for that also. 2. Feel the hoses. They should be rather hot to the touch. In fact, the coolant should be about hot enough to burn you. If after running for awhile they're still cool or just barely warm, I would indeed change the thermostat. 3. If everything feels hot, you could try flushing the heater core. You'll see 2 smaller hoses about the size of a garden hose going through the firewall. They are to your heater core. It may be clogged. Basically you cut the hose and hook a garden hose up to them flushing water through it. If the hose gets stuck on the metal tubes, just cut it off. Don't grip it tight and twist with pliers. Those flimsy metal tubes will collapse then you have a bigger problem.

Feb 11, 2013 | 1992 Dodge Grand Caravan

2 Answers

No heat on my 98 caddy deville delegance?

do the heater core coolant supply hoses both get hot at the firewall in the engine compartment? if yes then you have a defective temperature control blend door actuater motor.

Oct 17, 2009 | 1998 Cadillac DeVille

1 Answer

Windstar 98, herratic idling

intake manifold may be leaking and cause rough idle pretty big job check for leaks heat could be heater control valve faulty or not getting vacuum its located near firewall under hood on pass side i think u will see 2 coolant hoses going into car firewall feel hoses also should get hot heater valve will be connected to 1 of the 2 hoses

Mar 26, 2009 | 2003 Chevrolet Monte Carlo

4 Answers

The heater still won't work after I changed the thermostat on my

Get a female garden hose adapter from the local hardware store. Disconnect the heater hose from behind the fan pulley and attach the hose connection. Disconnect the other heater hose behind the alternator, aim it towards the ground and flush water through the heater core. This worked on my truck.

Feb 12, 2009 | 1999 GMC Sonoma

2 Answers

98 jeep wrangler no heat

Try this disconnect the heater hoses from the heater core use a hose to backflush the core. Then reconnect and try again.

Oct 18, 2008 | 1998 Jeep Wrangler

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