I have taken an old cap, drilled a hole, tapped for 1/8 pipe thread, and added connection to pressurize with air. With a gauge in the connection, you can monitor initial pressure and bled off.
volvolugnut

I suspect you have some carbon galling the end of the thread. Try some penetrating oil in the spark plug hole and wait for it to do some work. Then try to tighten and loosen in small increments. Do not exceed normal plug torque spec. Keep working and relubricate if needed. Patience is the key. volvo...

WD-40, Kroils, PB Blaster, whatever you have.
volvolugnut

Life is not fair. But you can adapt.
volvolugnut

Maybe expanding rubber stoppers used by plumbers to assure they do not pop out.
volvolugnut

About June 5 I had a no start condition that final started after giving some throttle. This was on my 2001 V70 T5 with 218,700 miles. I got it home about 4 miles in what must have been limp mode. Poor throttle response. Surging idle. RPM limited to 2000 RPM. I shifted manually to get up to 45 MPH. I...

Put a little over 6,000 miles on my 2006 S60 since I purchased it in early February so I did my second oil change yesterday and am going to do a drain and fill on the transmission fluid since I have no record the last time or if it was done. I am guessing that it was at some point before the record...

I understand the air cooled Porsche engines get most cooling from the oil circulation..
volvolugnut

Got all three m6 hex bolts out of the hard line and compressor hose fitting without drama. Had to go to the KOBalt test of fluted nutgrabbers on all three as the internal hexes were not going take the break free torque. All of this hardware will be replaced, it’s all my hex by 20mm threaded shaft l...

You are an inspiration to DIY everywhere!
volvolugnut