Compression Ignition Addict
Join Date: Oct 2011
Location: Tehachapi, CA
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Don't know what year truck he's working on, but that is the oil pressure regulator on the block side of the oil cooler header adapter. The earlier trucks could have that fall out while the later ones got the snap ring retained version (along with the bypass valve that used to always fall out on early trucks). Those parts are not sold separately (you have to buy the whole thing):
Oil Filter Header (updated snap ring retained bypass and regulator valves)
Tousley Ford Parts Online will probably have the best price on it. Cheers!
1997 F250 SC 4x4, E4OD, 4.10 LS, Basically Stock, Relocated Block Heater Plug, External Trans Filter, Tru-Cool Max, I/C Mounted but not Plumbed
SOLD - 1994 F350 CC DRW 2WD PSD, 5 Speed, 4.10 LS, SBC Con-O, Baldwin Filter, Tymar HPX Hose, DPPI DP, Bilsteins, $12 AIC, Coolant Filter, Explorer Overhead Console, A-Pillar w/ISSPRO Black Ice, EV Boost, and EV Pyro, Modified Pedestal, Gutted EBPV.