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DIY: 1998 S70 GLT Turbo Coolant Hoses and 2 Radiator Hoses

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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cn90
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Volvo Repair Database DIY: 1998 S70 GLT Turbo Coolant Hoses and 2 Radiator Hoses

Post by cn90 » Sat Mar 16, 2013 5:42 am

This is strictly preventive maintenance:

- The Turbo Coolant Hose was bulging and about explode any time.
- The Lower Rad Hose is leaking at the radiator side.
- Since I am replacing the Turbo Coolant Hose, I may as well replace both Rad Hoses.

PARTS:

- Lower Rad Hose PN 9470409 for Turbo (NA different PN); about $35 at dealer.
- Upper Rad Hose PN 1335433, about $15 at dealer.
- Turbo Coolant Inlet Hose PN 6842190, about $8 at dealer.

Optional (but highly recommended):
- Turbo Coolant Outlet Hose, PN 30713305, about $5 at dealer. A few months ago, I replaced this hose using some generic fuel hose lying around in my garage.
- Vacuum Hose for Turbo, I don’t remember the exact I.D., all I know is the O.D. = 10-mm. So my guess is the I.D. is about 6-mm. So a 1/4-inch vacuum hose should work. I happened to use the stuff I have lying around.

For the coolant hoses, stick to Volvo OEM unless you want to do the job twice, not to mention you can cook the engine!

VolvoRadHose01.JPG

TOOLS:

- Super-long screwdriver, about 18-inch or 20-inch type
- 17-mm Box Wrench
- Rubber Hammer
- Coolant: my coolant is relatively new (2 years old Volvo OEM), so I re-used it using coffee filter paper/funnel combo.
- Long needle tip pliers, about 12” to play with clamp on the Turbo vacuum hose.

A GOOD REFERENCE:

Turbo Hose about going South by “tailor”:
http://www.matthewsvolvosite.com/forums ... =1&t=16852


PROCEDURE:

- Since I replaced the Turbo Coolant Hose, I may as well drain the whole cooling system, it is much easier than you think.
- When old hose bonds to Metal Pipe, just rotate it before removing. Or insert a screwdriver into the space. Or use a utility knife to slice it off.
- Always clean the Metal Pipe nicely before installing new hose: use a small screwdriver/sand paper to clean the old gunk. Just get rid of the junk for a good seal later, no need to be shiny perfect.
- Don’t assume your new hoses are clean inside, wash it with some water to clean out any debris inside before installation.

- During installation, always add a bit of oil/grease (very thin smear) on the Metal Pipe, it makes insertion of the new hose (which tends to be tight) much much easier.
- Inspect the factory clamps, I re-used all the clamps. If in doubt, replace defective clamp(s).
- Likewise, I re-used the two (2) copper washers on the Banjo Bolt on Turbo, zero issues.
- For the Turbo Coolant Hose, don’t even try to replace it from ABOVE. It is very very difficult, if not impossible, I tried and failed. Then I did it from BELOW and believe me, it is much easier than I thought after reading all the DIYs. If you follow the tricks below, it will be super-easy!

1. With front of car raised on wood ramps, drain coolant via Lower Rad Hose. If your Radiator is old (more than 10 years old), don’t touch the petcock as you can crack it, and finding a spare petcock on a Sunday can be very difficult! So the best bet is by loosening Lower Rad Hose.
- Drain coolant into a pan and set it under the car so debris/leaves don’t fall inside and you don’t step on it.

2. Do the easy job first, difficult job later. The Upper Rad Hose is straightforward.
- Note the orientation of the old vs new hose and duplicate it, the white lines on the new hose face up.

3. The Lower Rad Hose: make a note or take a photo of its routing so make install easier.
- Remove top of Air Filter Housing (a few clips) and swing it out of the way.
- D/C the connection downstream of the MAF and tape the Intake Elbow out of the way.
- Now you can see where the Lower Rad Hose connects to the Metal Pipe:

VolvoRadHose02.JPG

4. It is much easier to use a string and pull the new hose through.
- Prior to install, I pour some water (from a bottle) into the hose’s Upper end to flush out any debris that might have ended up in there.
- Tighten clamps.

VolvoRadHose03.JPG

5. The Turbo Outlet Hose is straightforward: simply loosen the bolt holding the heat shield and replace the hose.

VolvoRadHose04.JPG

6. Now take a beer break before the next challenge: the Turbo Coolant Inlet Hose.
- While underneath, I noticed some oil at the bottom of the Turbo, not a big deal but I wonder if this comes from PCV system vs Turbo itself:

VolvoRadHose05.JPG

- Anyway, from below: this notorious clamp screw faces up from factory, some people do this do that from above to get to this screw: very long extension etc. via a very crowded place. There is a much easier way: from BELOW, use the very long screwdriver and rubber hammer, tap the clamp slowly and it will rotate around until the screw faces yourself. Now you can use the same long screwdriver to undo it.

- D/C the hose from the nipple using the long screwdriver to pry it out. A bit of coolant will come out, maybe 2 cups or so. Don’t let coolant get in your eyes, if it does, flush your eyes immediately. Another trick, poke a small hole in the old hose and let coolant drip out slowly, it will take 2-3 min to empty the coolant left behind.

- Now you can feel the 17-mm Banjo Bolt, place a wrench there, then go ABOVE and tap it with a rubber hammer to undo it. LEFT hand holding the wrench against the banjo bolt, while tapping the wrench with RIGHT hand using rubber hammer. Note that you should stand from passenger side, so tap the rubber hammer toward the driver side to undo this banjo bolt.

- Don’t lose the 2 copper washers!

VolvoRadHose06.JPG
VolvoRadHose07.JPG


- Now you have the Banjo Bolt/Pipe/Hose combo out: don’t disconnect it yet! Note the orientation of the pipe vs hose for install, this is because once it is in the car, you simple cannot get to the clamp between the pipe and the hose!

- Now install the new hose, making sure you have the correct end (the hose has different I.D. on each side), then rotate the hose to match the photo, then clamp it.

- Clean the banjo bolt/washers before install. I flush with some water to clean the combo. Then one drop of oil on the banjo bolt to make sure it goes in smoothly. I don’t know the torque for the banjo bolt, but I hand-tightened until it stopped, then 2-3 gentle tap with rubber hammer and called it a day.

- NOTE: during install of the hose from below, because of tight space, place the clamp on the nipple first, then slide the new hose in. This way you don’t have to fight to get the clamp through the flared part of the nipple/hose combo.

VolvoRadHose08.JPG

- If you look carefully at the vacuum hose at the Turbo, you will see that after 15 years, it is crumbling.
Replacing this hose was a challenge:
* Note its routing
* Use a string to pull it through
* The hose bonded to the solenoid nipple, so be patient and go slowly to remove all remnants.
* At the bottom, the space is tight, so removing the clamp is difficult. Use the long needle tip pliers

VolvoRadHose09.JPG

- Now take a break and mentally review that you tightened all the clamps, the banjo bolt (with 2 copper washers) etc. properly.
- Fill coolant, since I re-used my coolant, I used coffee paper filter to filter out debris. It is slow, so be patient if you do it this way.

- Now you need to bleed air out of cooling system.
- Start the engine, turn heater on, drive around the block, but don’t go too far from home. Do this until the engine warms up. The “Low Coolant” light will be on as soon as air is expelled. Then you will need to add about 1/3 gallon of the 50-50 mix again.

That is all boys and girls, not that difficult if you are patient and methodical!

VolvoRadHose10.JPG
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louty
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Re: DIY: 1998 S70 GLT Turbo Coolant Hoses and 2 Radiator Hos

Post by louty » Sat Mar 16, 2013 9:23 am

another great write up...and another future project

with as much trouble as it is to do, I guess I would use new copper washers, had too many ( crush washers) leak that have been reused, yet not seeing that application, maybe they would be just fine



cn90
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Re: DIY: 1998 S70 GLT Turbo Coolant Hoses and 2 Radiator Hos

Post by cn90 » Sat Mar 16, 2013 9:58 am

To be honest with you, in my 30 years wrenching, I only changed the copper washer once.
I have reused washers hundreds of times, zero leaks.
Anyway, it is people's choice to replace washers or not.


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jreed
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Re: DIY: 1998 S70 GLT Turbo Coolant Hoses and 2 Radiator Hos

Post by jreed » Sun Mar 17, 2013 6:09 am

Thanks! This is great. I admire the trick to twist the hose clamp around with a long screwdriver so you can undo it from below. I'm going to remember that one for next time! :)


1997 855 GLT (Light Pressure Turbo) still going strong. Previous: 1986 240 GL rusted out in '06, 1985 Saab 900T rusted out in '95, 1975 Saab 99 rusted out in '95, 1973 Saab 99 rusted out in '94

cn90
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Re: DIY: 1998 S70 GLT Turbo Coolant Hoses and 2 Radiator Hos

Post by cn90 » Tue Mar 19, 2013 2:22 pm

I forgot to add a photo showing the Rear View of the 5-cylinder engine.

Note that different Turbo models may have different setups, i.e., where the Inlet hose is routed.
I took this photo from the internet to show you the Rear View of the Turbo engine, mine is slightly different from this photo below.

Here you go:

VolvoTurbo.jpg
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98T5
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Re: DIY: 1998 S70 GLT Turbo Coolant Hoses and 2 Radiator Hos

Post by 98T5 » Tue Mar 19, 2013 3:18 pm

I remember changing my turbo inlet hose. what a PITA! for just 2 inches of hose.


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Re: DIY: 1998 S70 GLT Turbo Coolant Hoses and 2 Radiator Hos

Post by erikv11 » Tue Mar 19, 2013 11:14 pm

I'm so glad I changed these turbo coolant hoses while the engine was out of the car, it was easy then.

Great writeup.


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Re: DIY: 1998 S70 GLT Turbo Coolant Hoses and 2 Radiator Hos

Post by cardiegoV70 » Sat Mar 23, 2013 11:06 am

Thanks! Now I know that the bulging hose up top is the turbo OUTLET hose. Why I can't find it on part diagrams is another matter.



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Re: DIY: 1998 S70 GLT Turbo Coolant Hoses and 2 Radiator Hos

Post by xHeart » Thu May 16, 2013 5:17 pm

Each time I complete a task maestro cn90 has another one for me to get on to. Here is my next...
MVS_0775.jpg
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Golden Retriever | 2014D VIDA DiCE | 2013A XC90 +140mi/225km | 2001 V70XC 1st Owner +190mi/ +305km | 1997 Volvo 850 NA 1st Owner +180mi/ +289km
Past: German Shepherd | 1989 Volvo 740 GL | 1979 Volvo 240

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Re: DIY: 1998 S70 GLT Turbo Coolant Hoses and 2 Radiator Hos

Post by xHeart » Wed Jun 05, 2013 9:49 am

In my situation, it is PTC where i will be cleaning.
The coolant lines appear dry in this photo.
V70XC_0863.jpg
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Last edited by xHeart on Wed Jun 05, 2013 9:55 am, edited 1 time in total.


--
Golden Retriever | 2014D VIDA DiCE | 2013A XC90 +140mi/225km | 2001 V70XC 1st Owner +190mi/ +305km | 1997 Volvo 850 NA 1st Owner +180mi/ +289km
Past: German Shepherd | 1989 Volvo 740 GL | 1979 Volvo 240

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