Fiat 124 Spider Turbo Engine Development
Pictured above is the complete Turbo engine block now looking much smarter with it's new black paint job and new core plugs.
I am proud to say that the engine is really coming together nicely. After a meticulous clean I inspected the bottom-end bearings and the bores to ensure that I was not wasting my time. The engine, which previously lived in my Strada had been sat in the garage fairly unprotected – dumped unceremoniously when it was replaced by the 16V engine, it had also been scavenged for parts for my Integrale over the last couple of few years. I also confirmed that the bottom end contains the all important oil spray jets which are pointed at the bottom of the pistons and only activate over a certain oil pressure. These all important oil jet ensure the pistons don't melt and maintain oil pressure on start-up and idle. This type of fiat twin cam engine block also features the end drive oil pump which is superior in delivery volume to the old type pump which id driven by the auxiliary drive pulley (also drives the fuel pump).
I'm glad to report that the bottom end was in good condition although the bores were showing signs of wear. Prior to it being removed the engine ran fine, did not pressurise the bottom end and did not burn oil – all a sure sign the bores still have some life left in them!
The bores were honed as a precaution and I was happy that they cleaned up to a satisfactory level. A re-bore with parts would add about £300 cost and delay things at this point so I was glad not to have to do it.
The above picture shows two red lines where I'm about to chop out the section between the lines in order to get the pick up into the sump well.
Other modifications to the sump were the oil return pipe from the turbo, extra baffling and the modification of creating a cut-out for the oil pick up pipe which would otherwise fowl the side of the sump