Still loosing coolant!!!

[jblackburn]

I think your compression values are low, but indicative of test method rather than a bad engine lower end. Certainly I would repeat this myself before concluding anything.

This might sound crazy but my 99 V70 was leaking coolant from the radiator, catching it all nicely into the tray below the radiator, and evaporating it all without leaving a trace on the driveway. I too, was getting coolant light every other week, wondering where it was going.

Its worth looking for a leak under the radiator by smell, at least.

Same happened with my car!

[MilehighV70XC]

What part of your radiator was leaking? My radiator is brand new Nissen from FCP, less then 2k miles. Upper hose is brand new lower hose is old but I can feel and see no leak from the lower hose. I cleaned the tray out so if any was leaking I think it would drip with the amount I loose, but maybe not. I will have to do some further diagnostics this coming weekend when I have some time.

Thank for all the help

[obayha]

Check your turbo cooling hose. It's only 6 inches long, the last thing to be replaced due to difficulty, and it can bleed off a little coolant under boosts while driving without leaving puddles when you stop.

Five dollar part. An hour to change. Hopefully that gets it, otherwise you've isolated your problem to the head. Maybe boost less (or never) until you figure it out.

Where is this located?
Mine's been doing the same for a while and someone (Cblackburn) mentioned about the turbo hose. Does it run coolant through/around the turbo? Would it show external leaks only, or could it leak into the turbo so you wouldn't see it drip?

[jblackburn]

What part of your radiator was leaking? My radiator is brand new Nissen from FCP, less then 2k miles. Upper hose is brand new lower hose is old but I can feel and see no leak from the lower hose. I cleaned the tray out so if any was leaking I think it would drip with the amount I loose, but maybe not. I will have to do some further diagnostics this coming weekend when I have some time.

Thank for all the help

I never found the actual leak, but I think it was the top tank dripping down the side of the radiator.

If it's a new one, I'd move on to other suspects. Particularly the turbo/expansion tank hoses. Or the heater core connections @ the engine.

[abscate]

My leak was in the lower left corner of the Al part of the radiator - I think you can see it in the thread I wrote on Radiator replacement - promptly outdone by another one here..

[MilehighV70XC]

This is what the plugs looked like after a 450 mile trip through the mountains and why I took it to the shop. The shop said I had a couple bad coil packs so I just replaced all five and the plugs. The car idled nice and smooth. After my last trip in the mountains the semi rough idle is back that was there before the new plugs and coils. The car seems to drive and accelerate just fine.
1 and 5 where pretty white, 2-3-4 where rusty looking and had deposits on them. 4 and 5 looked like a dipped the threads in oil and on 4 the electrode on the plug had oil on it. I think the oil is from bad o-rings in the head? I know it is not from over filling or leaking from the fill cap seal. I replace it every oil change.



Link from previous post
https://www.matthewsvolvosite.com/forums ... =1&t=55278

[abscate]

You might just have a very slow seep in the heater core. If its slow enough, you won't get any wetness or coolant in the car, but you will lose coolant on a timescale of weeks. If you aren't a smoker, you can probably detect a faint EG odour in the car, slight sweet smell.