98 V70 T5 Replacing the Coolant Hoses in Pics

[cn90]

@Redneck,

You can rebuild any hoses in the car with minor exception.

The only hose I will never rebuild on my driveway is the high-pressure hose running from PS Pump ---> Steering Rack, that hose can reach some 500-1000 psi (I need to verify this), so this is about the only hose I buy new, and not just any brand, I buy only OEM, whether Honda or BMW.

Any other hoses: you can rebuild inexpensively and the quality is very very good. Examples:

1. Heater Hoses: this is what this thread is all about, dremel out the old crimp, re-use the elbows. Buy good American-made heater hoses and you are good for another 100K+ miles.

2. Oil Cooler, Trans Cooler. Same idea (dremel out the old crimp, re-use the barb fitting). Use good American-made trans cooler hose.
I did this and posted a DIY below...

DIY: 1998 S70 GLT Trans Cooler Line Rebuild for $10!
https://www.matthewsvolvosite.com/forums ... hp?t=55794


PS: From a chemist standpoint, heater hoses are made from EPDM, while oil hoses are made from Nitrile. This is what I was told, but I need to verify this fact.

[Ben850]

To clarify the "URO" hoses, they are a remanufacture, using some original copper tubes, and a pot metal clamping as opposed to the original pressure fitting.

Remanufactured "URO".

It is an aftermarket brand known to utilize less than good polymers.

The original is a nice coupling from hose to copper. The weak link is still the bulkhead transfer.
It was over complicated, but for the sake of assembly line.

I am about to do the same thing only different on the '98 XC. Live and learn. I may use red silicone this time?
Kidding.

[cn90]

BLUE, not red lol...you guys silicone people haha...

[cn90]

I plan to do the same thing as songzunhuang did in Dec 2014. See photo below:






Basically:
1- Cut pipes inside cabin and run 5/8-inch heater hose from pipes to coupler.
2- Cut crimps on heater hoses (that run to engine block) and throw away the 17-year-old rubber hoses but re-use only the barb fittings x2.

I need to know how much 5/8-inch heater hose (i.e. how many feet?) I need to buy for the entire project?
I am guessing 6 feet but I may be wrong.

Thanks!

[erikv11]

- pipes are about 10 inches each (max)
- allow 4 inches or so to get through the firewall, that is also generous
- hoses are 23 inches and 13 inches, I measured these

The hoses still have to make a full 180 degree turn in the engine bay so to match that path you might need a little more than 23 and 13 inches; 6 feet should be plenty.

Gates Green Stripe is a very high quality rubber hose and most decent parts stores sell it by the foot.

[francisp]

I too, had this problem of the coolant inlet hose to turbo ( PN#6842190) leaking profusely from being worn and bulging at both ends. I spent an entire week, ususally after I got off work to get this done. It was 30 degrees or less, in the garage with no heat, slaving away in ridiculously close quarters trying to detach and reattach a hose that cost 10 bucks to replace but a good portion of one's sanity and patience. Yes, I hated my car just a little bit more after this...

[abscate]

That one is a bitch. Common sense says the shorter a hose is the easier the job should be, and that logic fails. I think I spent an hour on that one.

[precopster]

I just had a 2.4T motor converted into a T5 car. The 2.4T doesn't have this hose as the layout has been redesigned for the P2.

However upon bringing all the T5 coolant layout over this hose (and all other hoses) were replaced. You can see this hose in the bottom lower left. The one in the bottom lower right which is a PCV coolant return hose would be equally painful while engine is fitted to the car.
Swapping the turbo and fabricating/replacing all these hoses took me an entire day with engine out !!

[abscate]

Interesting Mike. On my 1999 T5 the PCV return is a short hose to the thermostat ( another bitch) to a hard banjo connection on the back of the cylinder head. I don't have that U hose.

[cn90]

I too, had this problem of the coolant inlet hose to turbo ( PN#6842190) leaking profusely from being worn and bulging at both ends. I spent an entire week, ususally after I got off work to get this done. It was 30 degrees or less, in the garage with no heat, slaving away in ridiculously close quarters trying to detach and reattach a hose that cost 10 bucks to replace but a good portion of one's sanity and patience. Yes, I hated my car just a little bit more after this...

I hope you used Volvo OEM hose!