Transmission Cooler Line Leaking

jamesbeat · Post by **jamesbeat** » 26 Jul 2016, 11:29

I have a 2000 V70 5 cylinder NA automatic with 183,000 miles, and a couple of days ago, I noticed a small dot of fluid on the ground under the engine.

On closer inspection, it appears that it is transmission fluid, and it looks as though it is leaking from the uppermost cooler line where it enters the radiator.

It's difficult to tell exactly where the leak is coming from, because the fluid 'creeps' along surfaces and has spread over a wide area.
It's also a very slow leak (around a quarter-sized drop under the car per day) so that also makes it very difficult to locate.

I had the radiator replaced a couple of years ago, and it looks as though they reused the green clip that holds the hose into the radiator connection.

I'm 90% sure that the leak is coming from the connector area, so I think replacing the o-rings and green clip is the logical first step.

I have been doing drain-and-fill transmission fluid changes recently, and I suspect that the new fluid could have cleaned out a bit of dirt that was previously keeping this joint sealed.
I should note that I used a Topsider fluid extractor to do the partial drains via the dipstick hole, so I did not disconnect the cooler lines during the drain-and-fill process.

I am also sure that I did not overfill the transmission fluid, and the car has been running completely normally for a couple of months since the last drain-and-fill.

I drive this car daily, so I don't want to risk taking the connection apart to examine the parts in case I can't get it back together again (that clip looks fragile).

Could someone please take a moment to point me to the exact parts that I need to order?

PS78 · Post by **PS78** » 26 Jul 2016, 13:45

Hi, this is a set with the components you mentioned replacing.
https://www.fcpeuro.com/products/volvo- ... kit-504490

jamesbeat · Post by **jamesbeat** » 27 Jul 2016, 19:14

Wow, that's pretty expensive for a couple of plastic clips and o-rings!

Thanks for the link, looks like exactly what I need.
I guess it's worth the price considering the cost of a new transmission....

Post by **polskamafia mjl** » 27 Jul 2016, 19:30

Plastic parts on old cars are usually expensive I've noticed.

Post by **oragex** » 27 Jul 2016, 20:49

Before replacing, while fully depressing the green clip on both sides twist a little the line then slowly but strongly pull the line - if the transmission is cold, it will leak very little if removed. Check the o-rings for dry and the green clip for cracks. Clean everything inside the rad real well. If the rubbers are still soft no cracks, put it back, might stop leaking.