DinoBru Sorry, I'm not selling any of my B20 heads. The one I photographed for comparison porpoises is about to head off to the machine shop for the engine rebuild of my 144, once all my new parts finish arriving from Sweden, Germany, and Only Gawd Knows Where.

@paul0075 in CBA might have a spare B20 head. @1971_144GL (also in LST like me) might have a spare he wants to get rid of. In Melbourne, try VolDat. And SA / WA / NT / QLD? No idea who might have old Volvo bits.

PS: Ideally, you'll want a late B20B head, which will already have the 44mm inlet valves like the Penta. B20E heads will have holes drilled for FI; B20A heads might only have the 42mm inlet valves, but have the advantage of more meat on them if they need resurfacing but the 44mm inlets can be made to fit. You will need to get the longer Penta manifold studs.

      I have a B20B head, where are you located?

        Rob I'm located in Adelaide, is it for sale, if so maybe send some pics that would be great. Rob.

          I have a complete 1972 B20A in my workshop in Mt Gambier that is available.

            Roinik great, was it running I'd have to see pics of the head while on it to see if it's compatible thanks Roinik.

              I have to dig a bit to get to it. The head is the same as the B20B photos above, but with lower compression. It does have small valves and a 6-bolt crank, being a 72. I haven't seen it run, but I've been told it was running before it was parked. I did turn it over with a screwdriver when I pulled it about 2019. From memory it had about 130,000 country miles on the clock.

                Roinik as long as it's a 10 bolt and pushrod type. When you get around to pics that'll be fine. My pics are a B18 Volvo Penta it ran fine with it.

                  Huh? You're obviously new to the marque. There's a 6-bolt crank (6x bolts in the flywheel) that is all Imperial and wider journal's, or there's the later 74+ crossover metric + Imperial 8-bolt crank. The latter can take the B21 pistons. The 6-bolt is more common, but reputedly suffered from the very remote chance of cracking a gudgeon pin. I suspect that failure was due to uncontrolled detonation.

                  Either one will do what you want. Either one has the potential, with a lot of head porting, to make decent power numbers.

                    Roinik That's sounds good because mine I believe is a early 70s Volvo Penta motor, as major ledfoot's pics shows that early 70s 144 can be modified to marine purpose, by blocking a couple of holes and putting one in . As mine has 42mm & 35mm valves.

                      13 days later

                      Rob where are you located Rob, is that B20 head for sale

                        Roinik Hi Roinik, wondering if you managed to find that motor at all yet.

                            There is a guy here in Perth that wrecks Volvo Penta engines if that may help. Found on Perth marketplace.

                              Ex850R Hi what type of head do you have available. I'm looking for a B20 push rod head.

                                  DinoBru it's in the back of my workshop. I've been very busy over the last fortnight, with half of that time spent away.

                                      Roinik if you were to sell how much would you be asking for it.

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