1998 V70 Leaking Transmission Fluid Lower Hose To Radiator

Post by **Eddystone** » 03 Apr 2021, 21:02

I have a significant trans fluid leak. When I looked under there, the lower hose was wet at both ends along the hose beyond the crimp. Both ends. New hose is around $125-140 and I'd rather not replace the hose if not necessary.

1. Do the crimps get leaky?
2. Do I just need new seals and retainers?

FCP Volvo Transmission Cooling Hose Retainer Kit - Nissens 6842411
https://www.fcpeuro.com/products/volvo- ... 0-6842411k

Based upon common experience, would this kit likely solve my problem?

The other trans hose to radiator is dry as a bone and looks fine.

I assume that if I buy the hose, I'll also need the seal and retainer kit. Also, a Volvo diagram shows two alternate connection types. One appears to have double the o-rings.

Advice appreciated.

Post by **ZionXIX** » 03 Apr 2021, 21:26

Typically the crimps fail and need replacing or rebuilding. Find a local hydraulic shop to rebuild the hoses for much cheaper. The other option is to pull some hoses from the junkyard and get those rebuilt to minimize your downtime.

Post by **ZionXIX** » 04 Apr 2021, 08:50

Here is a thread where a forum member rebuilt the lines himself. viewtopic.php?t=55794

Post by **abscate** » 04 Apr 2021, 10:07

I can send you spares while you rebuild if needed. Pm me

Post by **Eddystone** » 08 Apr 2021, 12:33

abscate wrote: ↑04 Apr 2021, 10:07 I can send you spares while you rebuild if needed. Pm me

Thanks very much for the offer. I'm feeling rich this week, so I ordered the OEM hose from FCP along with a Nissen radiator for the 1999 T5. Of course, the 98 and 99 use different fittings for the trans cooling hoses at the radiator. Wish I had found a 98 T5, but the 99 runs very sweetly. Definitely different on the gas pedal due to fly by wire and more horses.

Post by **Eddystone** » 08 Apr 2021, 12:42

ZionXIX wrote: ↑04 Apr 2021, 08:50 Here is a thread where a forum member rebuilt the lines himself. viewtopic.php?t=55794

Thanks for the link. I rebuilt my heater hoses in a similar way. Will definitely rebuild the upper trans hose if it fails, but right now it is dry as a bone. (Good)

Post by **MoVolvos** » 08 Apr 2021, 12:54

Eddystone wrote: ↑08 Apr 2021, 12:33
abscate wrote: ↑04 Apr 2021, 10:07 I can send you spares while you rebuild if needed. Pm me
Thanks very much for the offer. I'm feeling rich this week, so I ordered the OEM hose from FCP along with a Nissen radiator for the 1999 T5. Of course, the 98 and 99 use different fittings for the trans cooling hoses at the radiator. Wish I had found a 98 T5, but the 99 runs very sweetly. Definitely different on the gas pedal due to fly by wire and more horses.

I had the 98 S70 T5 and loved it but I think I would prefer the 99 due to the curtain bags which the 98 did not have. As for the hose our 03 was leaking but I did not know it when purchased as the whole underneath was wet with fluid. The previous owner had driven it that way for a long time. The interior reeked of burned oil smell for the longest time.

The lower hose popped off one day as my Son was pulling away and I found out one of the two O-rings had been sheered by whoever installed it and the green (new style) clip was also damaged. So lubricated the O-Rings with some dielectric grease before installing. It's slicker than trans fluid or other petroleum greases.

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Post by **Eddystone** » 09 Apr 2021, 16:31

MoVolvos wrote: ↑08 Apr 2021, 12:54 So lubricated the O-Rings with some dielectric grease before installing. It's slicker than trans fluid or other petroleum greases.

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I used to work on x-ray equipment. The high voltage cables going into the tubes carried as much as 150,000 volts on three pins at the bottom of the socket. They were like big thick seven-inch candlesticks, and we'd install them with what you would think is about two cubic inches of silicone dielectric gel or grease to keep them from arcing to ground. It was a normal maintenance task to renew the grease from time to time. If it got old and started to dry out, there would be an arc from the pins all the way up the seven inch well to the grounded rings that held the cable ends into the x-ray tube. You would find a little carbon track running all the way up the cable end which was like a thick seven inch candle. I still have big tubes of that stuff from about fifteen years ago. Cable attachments were sealed with rubber grommets like o-rings, and of course the silicone never hurt the plastic cable ends or the rubber.

Never got a high voltage shock, built the old Phillips machines used lots of little relays that ran on 240 VAC, and I got an elbow onto one of those while touching a frame once. Ouch. They could have done the same thing with 12 VDC, but European engineers did things the way they wanted to back then. Siemens was the same, but there were fewer opportunities to hurt yourself.

Post by **MoVolvos** » 11 Apr 2021, 17:03

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GE, Phillip and Siemens. Around 10 years ago I was offered a job to manage HVAC contractors that work on GE MRI cooling systems. There are two for each MRI machine. In the 2nd week I travels to 27 hospitals in 10 days straight circling Georgia, vetting and training the contractors. Actually, the company flew out a super tech from Shanghai to do the training (myself included). This person was the most familiar with the cooling system as it was made in Beijing and this tech was the go to person who travels all of China to work on the GE MRI's. This guy was really, really good, a true hands on Engineer.

The travel and having to manage East Coast companies beside being the go to guy for troubleshooting while keeping West Coast office hours... Was told I could work from home and manage my own hours initially but when I was also asked to delay payment to the contractors... Adios Sayonara.

They were hoping to also get the contracts from Phillip and Siemens someday. They were going to silicone grease me and the contractors because we were working stiffs.

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