98 V70 Clutch hydraulic line failure 9181324 [Detailed pictures of a 2025 1999 clutch hose replacement]

[abscate]

You can try bleeding it by putting a hose on the clutch bleed screw and pumping fluid through slowly, keeping the reservoir full the whole time. Put a big U in the tube so that the bleeder stays submerged.

[regent]

... Put a big U in the tube so that the bleeder stays submerged.

Make sure the "big U" stays belly up like so: ∩

[kranz]

I can bleed the clutch, but I'm not sure what it would tell me. If indeed the master or slave is faulty, it would again lose pressure. I suppose it would confirm that one of the cylinders is faulty; but I don't see that it could tell me which one.

Am I missing something? I do have a power bleeder I could use. It has a pressure gauge that goes up to 30 psi; but I'm guessing the actual operating pressure of the clutch is higher than that.

[kranz]

I have a bit of good news to report. In the interests of science I decided to get off my butt and give the clutch a good bleed. Before I got started, I just put my pressure bleeder on the reservoir and pumped it up to 10 psi to check for leaks. It stayed at 10 psi for a few minutes, but then suddenly I heard a pressure leak, the pressure began to drop, and a puddle of fluid appeared on the driveway under the car. It turns out that a rubber section of the hydraulic fluid line between master and slave cylinders has a leak. So rather than replace a clutch cylinder, I am merely faced with replacement of the hydraulic line. Minor surgery when compared with replacement of the slave cylinder.

Thank you all for advice given. I guess the lesson learned here is to be rigorous when troubleshooting and avoid making too many assumptions. I had assumed it was one of the cylinders and had ruled out the universe of other possibilities.

[abscate]

Nice!! That's a much easier job than the slave cylinder of course. Thread title amended.

[kranz]

Surgery is complete and the patient lives. I replaced the Hydraulic line with Volvo part# 9181324. This is the part for a car with internal slave cylinder. It came with a clutch bleeder adapter attached which in my case was unnecessary & unused. It was necessary to remove the airbox and some of the plumbing to get it in place. The only trouble I had was getting the line bled. I thought a power bleeder would make it easy, but had to do it several times after first doing a gravity bleed. I recall seeing a suggested "oil can" bleed method here on this forum, and were I to repeat this repair, I'd give that method a try.

Now, I'm in a race against time. My vehicle registration expires soon and I have to pass a emissions test to renew it. But having disconnected the battery during the repair, I have to complete the requisite drive cycles to turn all the ODB monitors to ready. I am hoping this will happen before expiration and I'm left with a catch-22 situation.

Once again, I am most grateful for the advice and consul of this forum that has helped keep this car on the road.

[kranz]

This morning all the ODB monitors went ready (after 210 miles) so I hightailed it over to an emissions test station and got the emissions certified. So, I'll be able to get it re-registered on Monday. Balance in the universe will be restored.

[abscate]

Federal EPA regulation allows you to have two monitors NOT READY on your 1998 - as long as your state follows the Federal guideline, you can pretty much get your car smogged after about 5 miles.

[kranz]

Not sure what the Georgia rules actually say. They failed my 2006 V50 with two incomplete monitors after I got a new battery. One went ready soon after but the last holdout did not capitulate for another 350+ miles.

The 1998 V70 had 6 incomplete monitors until this morning when they all went away.

[kranz]

Apparently in Georgia older cars can pass with two monitors not ready; newer cars with one. Here are the Georgia ODB rules according to a publication by the "Georgia Clean Air Force":

Nineteen-ninety six (1996) and newer model year vehicles perform up to 11 system tests, depending on the model year,
make and model of the vehicle. These tests are performed by readiness monitors. The readiness monitors continuously or
periodically check the emissions control system and its components. If enough monitors have not completed the check of the
emissions control system by the time a motorist presents a vehicle for inspection, the vehicle’s on-board diagnostic (OBD)
computer will not be “Ready” and will fail the inspection. For example, 1996 to 2000 model year vehicles will fail if three or
more monitors are “Not Ready,” while 2001 and newer model year vehicles will fail if two or more monitors are “Not Ready.”

Georgia emissions readiness