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I picked up cheap a 98 s70 turbo that had been sitting over a year for bad water pump and drove home. Left outside a few days then drove into garage to change water pump. After a lot of hassle put it back together, double checked timing marks went to crank but no start but engine clearly had compression. No worries, checked plugs a were dirty. Changed plugs, wire and coils and decided to add camshaft and crankshaft sensors just to take it off the table in future. Went to start and seemed to have no compression. Heard about lawnmower syndrome. Did what was suggested, nothing. Checked fuel and fuel pressure, spark, timing and all were fine. Engine turns just fine both manually and when ignition keyed but when I used compression tester and checked there is zero compression across all cylinders. Literally zero! Every single one! I started on first crank and drove the car maybe 50 ft two days prior. Other than trying to crank no evidence anything else was done. A gasket leak on one or two cylinders would reduce compression on maybe 1 or 2 but all five driving a few feet blowing the whole gasket? I feel like I'm missing something obvious. This is the first Volvo I've worked on but it's still a car. Right? They still work the same way??? I'm just a shade tree mechanic who likes little projects to fix I'm no expert by any means. Anybody have a clue what I'm dealing with or is this a junker I'm wasting time on? Any suggestions I'd appreciate it.
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