Coolant hose replacements

[ATPTac]

Replacement hose part numbers was not the issue, but a little how-to would have helped. So this is who I did it.

When putting on my radiator hoses, I found them all unbelievably difficult. The bottom bent hose I found a replacement for at O'Reilly Auto Parts. It was a MasterPro 20611. It only had one bend in it, but I was able to fit it on without a kink. The other hose was a Gates 22516. I cut it in half to accommodate the 2 smaller diameter hose connections.

The upper hose that runs under the injector pipes was one of the most difficult. It took me 6 days to get it on.

The hose is 2” ID, the barb on the bent pipe was about 2 1/8”. I do not know what the OD of the casting on the manifold was, because I did not measure it, but it was significantly larger. It was probably at least 2 ¼” OD.

So, I finally found that I could soften the hose first by put it in hot coolant water. I then installed both of the hoses onto each end of the J pipe, and I used the J pipe to install the other end of the 2” hose onto the manifold. I used the J pipe for leverage and twisted and pushed it on.

I pre-cut the hose length at 3”, so that I could use the J pipe to push it onto the manifold casting.

The 2 hoses on the intake manifold required removal of the 2 piece water manifold, and cutting new gaskets, then the same treatment of cutting the hose to 3”, then heating it in hot coolant, then pushing it on.

I also replaced the belts at the same time, because they are in the way of the hoses.

Another trick you can try next time is to spray down the outside of the hose with carb cleaner. If I'm not mistaken it actually temporarily expands the hose and then returns to its normal size when the carb cleaner evaporates. I do it all the time at work. Works for getting stubborn hoses off as well as on. Another way to help get hoses onto an inlet is to spray the inside of the hose with aerosol silicone.

 

[Beyond Biodiesel]

Thanks for the suggestions. I had a heck of a time getting the old lower hose off of the radiator, so carb cleaner would have made that job easier, if I knew the trick.

But carb cleaner is an organic solvent, and using an organic solvent on a new radiator hose, which is designed for water and radiator fluid could lead to shortened life for the hose, while radiator fluid is slippery and works great normally. I just recycle some of the old radiator fluid for installing the new hoses. Normally all I have to do is dip the end of the hose into the old radiator fluid and it slips right on.

Now discovering heat will soften and allow a hose to expand onto a too large manifold barb fitting has made all of the difference.

I drained the radiator into a 5-gallon metal bucket, and to heat the old radiator fluid I put the bucket over another 5-gallon steel bucket that I use as a wood burner to keep warm with when I am working outside in the winter. It worked great.

 

[DHennon]

Use extreme caution when removing the water manifold bolts. They have a tendency to break of. I did a light tap on each one with a hammer, soaked them with PB Blaster, light tap again, and removed them. None broke off. I replaced all of them with grade-8 bolts and used anti-seize compound.

Take the advice of earlier posts, use a military lower radiator hose. The curve molded on the hose will save you much grief. Lubricating the inside of each hose with antifreeze makes putting them on easier as well.

Just my 2 cents worth.

 

[Merc1973]

Use extreme caution when removing the water manifold bolts. They have a tendency to break of. I did a light tap on each one with a hammer, soaked them with PB Blaster, light tap again, and removed them. None broke off. I replaced all of them with grade-8 bolts and used anti-seize compound.

Take the advice of earlier posts, use a military lower radiator hose. The curve molded on the hose will save you much grief. Lubricating the inside of each hose with antifreeze makes putting them on easier as well.

Just my 2 cents worth.

Great advice thanks. Were the bolts easy to match for grade 8? Do you remember the size so I can prepare ahead of removing them?

 

[Merc1973]

I need to replace at least two of my coolant hoses, so I'm planning on fixing all of them. Heres where I need the help. I count 7 hoses:

1. Upper Radiator Hose, Diameter - 2", Length - unknown, Cross Ref - NAPA 24032.
2. Lower Radiator Hose, Diameter - 2", Length - unknown, Cross Ref - NAPA 20611 Gates 7759 or 7372?
3. Hose from Waterpump to Oil Cooler Pipe, Diameter - 2", Length - unknown, Cross Ref - N/A (straight single diameter hose).
4. Hose from Oil Cooler Pipe to Oil Cooler, Diameter - 2", Length - unknown, Cross Ref - N/A
5. Hose from Water pump to Thermostat Housing, Diameter - 2", Length - unknown, Cross Ref - N/A
6. Rear Hose for Water Manifold, Diameter 1.75", Length - unknown, Cross Ref - N/A.
7. Front hose for Water Manifold, Diameter - 1.75", Length - unknown, Cross Ref - N/A.

Can anyone help provide some current NAPA, Autozone, Oreilly, etc. part numbers for close hoses, and/or provide diameters for the straight hoses?

Also, are there any other hoses I missed (besides the heater hoses)?

To add to this list, does anyone know the heater hose size?

I plan on sourcing some black silicone hose here:

http://www.siliconehose.com/4-ply-silicone-straight-hose/

 

[steelandcanvas]

To add to this list, does anyone know the heater hose size?

I plan on sourcing some black silicone hose here:

http://www.siliconehose.com/4-ply-silicone-straight-hose/

I just purchased and replaced my heater hoses last week, I bought 5/8" (.625).

 

[Menaces Nemesis]

"So, I finally found that I could soften the hose first by put it in hot coolant water. I then installed both of the hoses onto each end of the J pipe, and I used the J pipe to install the other end of the 2” hose onto the manifold. I used the J pipe for leverage and twisted and pushed it on."

Old thread I know, but I replaced some upper hoses today and this info helped immensely. Using the J-Pipe for leverage to get the hoses onto the excessively large oil cooler and water pump necks worked like a champ. Many Thanks to "Beyond Biodiesel" for post #20.

MN