98 S70 Help steam and coolant light

Post by **kickin_it** » 02 Jun 2014, 12:25

On my way to work the low coolant light illuminated and I could hear and see steam coming from the back (drivers side) of the motor. At quick glance in the work parking lot it appeared it was underneath or around the distributor. What should I look for after work? Isn't there a hard coolant line around there may have come loose?

Post by **rmmagow** » 02 Jun 2014, 12:47

Don't try to drive it. Probably a turbo coolant line. You're ok if it didn't overheat but have it towed home or to a garage for repair.

Post by **rmmagow** » 02 Jun 2014, 12:48

see this post:
https://www.matthewsvolvosite.com/forums ... =1&t=55306

Post by **cn90** » 02 Jun 2014, 12:50

You need to do 2 things:

1. Tow the car home.

2. Then read this DIY.
DIY: 1998 S70 GLT Turbo Coolant Hoses and 2 Radiator Hoses
https://www.matthewsvolvosite.com/forums ... =1&t=55306

You are lucky because in your area, Darrell Waltrip Volvo has parts at very competitive prices.

Post by **kickin_it** » 02 Jun 2014, 14:13

So do we think it is a turbo or radiator hose? Most of them have been replaced less than a year ago, not at the same time but collectively. I haven't had time to research it today or have much time tonight as it is my only mode of transportation. Thanks guys and gals.

Post by **kickin_it** » 02 Jun 2014, 18:50

Got the car home. Up on the jacks, filled with water and cranked. Obvious leak at the turbo inlet hose but I could not find any breaks, holes or tears once the hose was removed. So I observed that the inlet hose basically connects the banjo bolt and stem to another hard pipe next to motor. On my S70 GLT there is another "outlet" "behind" where the turbo inlet hose connects to the hard pipe opposite the banjo side, what hose is this and where does it go? Its obvious its a coolant hose of some type.

I attached a picture of my turbo inlet hose, it is bulging but not sure where or even this was the origin of the leak.

Post by **kickin_it** » 02 Jun 2014, 20:15

The hose behind the turbo coolant hose I am thinking is a heater core hose that runs through the firewall, am I correct? I had a leak that was coming from this location, I assume it was due to a fattened turbo inlet.

Post by **abscate** » 03 Jun 2014, 01:56

I think that hose is connected to a return pipe for coolant, not the heater pipes. I'll try to find link to that system in diagram for you.

Post by **cn90** » 03 Jun 2014, 05:59

kickin_it wrote:The hose behind the turbo coolant hose I am thinking is a heater core hose that runs through the firewall, am I correct?...

Correct,

I just took your photo and put it next to a factory diagram. I label with some colors for you to see:

BLUE: Radiator system
RED: Turbo system
YELLOW: Heater system

So the hose you referred to (next to the Turbo INLET hose) is in fact the Heater Hose.
If you confirm that this is the problem, my suggestion is:
- Replace BOTH heater hose but look into the mod by "erikv11": cutting metal pipes near heater core and run the 5/8-inch heater hoses ---> through firewall ---> engine. You need a bit less than 6 feet. Auto parts store has this hose.
- This is because the coupling at the firewall can be troublesome.
- Also the heater hoses are expensive ($65/each for Volvo OEM hos, stay away from "URO" brand!).
Anyway, if you stick to generic 5/8-inch hose from local parts store, it only costs $6 for 6 feet!

: Volvohose.JPG (122.96 KiB) Viewed 2929 times

Post by **kickin_it** » 08 Jun 2014, 15:12

So it was not the turbo inlet hose but it was close to failing and needed replacement. It is the hose running from the motor to what is I assume the heater core. I need to replace this hose and was wondering the dimensions on it. I was also wondering if anyone else has tackled this and how you went about it. I just need to the car to run and drive a little while longer so I am not worried about URO to Volvo parts and found a replacement on the internet for less than 20$. I have performed the deletion of the firewall coupling per the tutorial on here. I ran the hose to just connect with the metal fittings inside the engine compartment. Now I need to replace on of the hoses with the metal fitting running to the block. I was thinking about just using some sort of connector and hose clamps instead of purchasing the hose with the metal end, anyone see any problems in this?