Today the last Abarth-Online shipment finally arrived: a set of ARP heard studs with washers and nuts plus the crankcase breather. Of course I immediately started cleaning all ARP parts. According to instructions, this must be done in soapy water; brush everything clean, rinse and dry thoroughly. Earlier I had cleaned the mounting holes in the block with a series of M9 taps so that I was sure that there would be no influence on the torque due to dirty screw thread. Of course I immediately mounted the studs and this really is engine porn!

850 arp set 850 arp schoonmaken 1 850 arp gemonteerd

The crankcase breather replaces the mechanical fuel pump (I use an electric pump) and just because I did not feel like mounting a cover in this place. I did not have an 843cc housing, but did have one of a 903cc engine. I did have to drill an extra hole in the flange because the original hole did not match with the flange on the distribution housing. This looks much nicer. And mounted it even looks better.

850 breather 0 850 breather 1

As last job of the day I made a small adjustment to the cylinder head; a development by Hakan Leppens that was passed on to me by Joop van den Einde. Where the push rod of the inlet valve of the 4th cylinder is located in the cylinder head, no oil can flow back from the top of the cylinder head to the cam follower. This is now made possible by milling away a small piece. A small job with good results.

850 cilinderkop gleuf 0

850 cilinderkop gleuf 2