2CV crank case strip down

With the crank case separated there were a few items that needed removing before they were ready to be cleaned.

First up, the oil pressure relief valve, this is a big 17mm nut on the off side

2CV oil pressure release valve

Inside there’s a spring and a plunger, which needed extracting with needle nose pliers.

2CV oil pressure release valve removal

2CV oil pressure release valve internals

On the other side is the low oil pressure sender.

2CV low oil pressure sender

2CV low oil pressure sender removal

In the front there’s some rubber seals for the oil cooler unions.

2CV oil cooler seal removal

The oil filter mounting plate is held on with two alan bolts, one inside the filter mating surface and one at the top of the plate.

2CV oil filter mounting plate

There is a rubber o-ring seal in the bottom of the plate where it mates with the crank case.

2CV oil filter mounting plate

The head studs are a bit awkward but the standard stud extraction technique of a pair of nuts clamped onto each other should provide enough purchase to get them moving.

2CV head stud removal

As part of the rebuild I’m fitting the SPOG oil filter adaptor, this allows the use of the more common 3/4″ 16 UNF threaded oil filters.  The kit comes with a a pair of nuts that fit the M16 thread on the old spigot and, using the same technique as for the head stud removal, it unscrews.

2CV oil filter spigot removal with SPOG nuts

2CV oil filter spigot removal with SPOG nuts

The new SPOG spigot has the smaller M16 thread on the lower half so it fits back into the mounting plate but the larger 3/4″ 16 UNF thread on the upper to attach the oil filter.

2CV oil filter spigot - SPOG replacement

Other posts in this series:

  1. Engine tear down
  2. Crank case strip down
  3. Valve removal