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Catastrophic heater hose failure ! Topic is solved

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
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1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
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Fiodor
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Fiodor

Catastrophic heater hose failure !

Post by Fiodor » Mon Jun 29, 2020 3:45 pm

Hello everyone, my car died yesterday during a strong pull in 2nd gear.

Coolant light came on, coolant spewing on the road, engine didn't overheat (stopped 8 seconds after the light came on).
No coolant on the front of the engine but some got on the heat shield above the exhaust manifold, the underside of the engine was so soaked that it was impossible to see where it was coming from.
Before I stopped the car worked fine, I didn't try to start it afterwards since I've heard that the coolant acts as a lubricant for the water pump and it's never a good idea to run any car parts without lube :D

What do you think could've happened ?
I'm thinking that a neglected head gasket might have increased the pressure in the cooling system to a point where one of my 23 years old coolant hoses might have just burst into pieces.

Thanks for your help as always !

French wireless hugs (wouldn't want you catching our Covid19) !
Last edited by Fiodor on Tue Jun 30, 2020 11:35 am, edited 1 time in total.
1997 V70 T5 2.0 AWD with welded angle gear at 240k km
1990 740 Break (dead)

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Fiodor
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Fiodor

Re: Smoke from engine and massive coolant loss on hard pull

Post by Fiodor » Mon Jun 29, 2020 3:48 pm

Ps: Radiator is new, water pump is 3 years old and 15k km, heater core is 1 year old.
1997 V70 T5 2.0 AWD with welded angle gear at 240k km
1990 740 Break (dead)

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abscate
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abscate

Re: Smoke from engine and massive coolant loss on hard pull  Topic is solved

Post by abscate » Mon Jun 29, 2020 3:59 pm

You probably blew one or the hoses from a the turbo to water pipe, or perhaps one of thE heater core hoses

Once it is cool , take some pictures so we can see. You can also fill up with water and then see where it comes ouT on the cold car since we are well away from freezing seasons , hiver, except in the Alps!
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Re: Smoke from engine and massive coolant loss on hard pull

Post by scot850 » Mon Jun 29, 2020 4:39 pm

Look as suggested at all the coolant hoses as one may have split but not be obvious. You can always refill the system with water and see where it comes out from as it may make it more obvious. Turbo coolant hoses may be a culprit here. Often overlooked and due to the heat in that area more prone to failure.

I wish you luck. When this happened to me it was in rush hour, no where to pull off as traffic was nose to tail. In my case it was the top radiator hose connection had snapped off the radiator. Strangely I was coming back from the dealer after they replaced the front sub-frame bushes but their work was not what caused it (already had new engine mounts all around).

Neil.
2000 V70 R - still being an endless PITA
2006 XC70
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - New project and test bed - Sold

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Fiodor
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Fiodor

Re: Smoke from engine and massive coolant loss on hard pull

Post by Fiodor » Tue Jun 30, 2020 11:29 am

Found the culprit !
One of the heater core hoses. I'm going to replace both as they were original :mrgreen:
IMG_20200630_183648.jpg
IMG_20200630_183716.jpg
1997 V70 T5 2.0 AWD with welded angle gear at 240k km
1990 740 Break (dead)

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abscate
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abscate

Re: Catastrophic heater hose failure !

Post by abscate » Tue Jun 30, 2020 12:19 pm

Man, we are just sticking the Volvo Horns this week.

Funny thing is a catastrophic failure like this is really what you want with a coolant hose - the alternative being a pinhole leak you don't notice until you overheat and warp the head.
I'm going to replace both as they were original
Ill bet you can find a Scot who will buy that other one, the tested spare.
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Re: Catastrophic heater hose failure !

Post by Clemens » Tue Jun 30, 2020 1:56 pm

Well, a OEM coolant hose splitting after 23 years is a Volvo quality issue. If you happened to own a Ford Mondeo or Contour from the same year as your V70, you would have split these hoses at least a decade ago (ask me how I know), which is good, because they'd be rusted out by now anyhow (I had 2 Mondeos that were nice cars till they started to crap on me with 12 or 13 years of age).
Glad your V70 survived!
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Re: Catastrophic heater hose failure !

Post by scot850 » Tue Jun 30, 2020 2:51 pm

Not in the market currently for damaged/holed coolant pipes. No where to store them! LoL!!

Like abscate says, at least it happened quickly and you were able to stop fast. Now check all the hoses! If you look at the outside of the hose and particularly where the split is you can see the pipe has gone dull and has a rough surface to it. The rubber is shot. Good rubber continues to harden for about 10 years (like in tires). After that you are running on borrowed time. The fat these have lasted so long is amazing.

Hopefully new hoses and new coolant and all is well! But especially check the turbo coolant rubber pipes (the short ones by the turbo). If these are original then change them at the same time. One may look not too bad but the other will be horribly swollen and deformed if they are also original.

Neil.
2000 V70 R - still being an endless PITA
2006 XC70
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - New project and test bed - Sold

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Fiodor
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Fiodor

Re: Catastrophic heater hose failure !

Post by Fiodor » Tue Jun 30, 2020 2:55 pm

I'm going to replace everything with silicone hoses, got myself a sweet deal with do88 where I get 70% off for translating part of their website from Swedish to French !
Bigger intercooler here I come :D
1997 V70 T5 2.0 AWD with welded angle gear at 240k km
1990 740 Break (dead)

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