It's a long story but I would like to do a compression test cold. Will this work at all or must the engine be warm? Would there just be reduced target compression numbers? This is on my '87 300sdl.

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1987 300SDL 167k
1992 Volvo 740 140k
1990 Volvo 740 250k
1989 Volvo 240 269k

Anyone want to trade an old Volvo for an '87 300sdl?

Yes, just inaccurate numbers. Probably best to crank the engine for a few revs after you have the injectors out to get the oil circulated.

Looking for a major problem?

Hopefully nothing major, it runs/ran fine, I just took it apart for maintenance- vac pump, timing chain, water pump, thermostat, etc.. Now I find that the tranny needs to come out (leaking front seal) so I'm debating on taking the whole powertrain out if the compression is low. But, it did run fine so I think I'll just pull the tranny. Besides, I can do a valve job with the engine in.

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1987 300SDL 167k
1992 Volvo 740 140k
1990 Volvo 740 250k
1989 Volvo 240 269k

Anyone want to trade an old Volvo for an '87 300sdl?

my chiltons foreign car manual lists cold numbers for the older 115 cars but i think the fsm recommends testing hot, definately for your newer 124 car.

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.