2007 at the Hammond Barn

[Paul Singleton]

Originally posted by Bob Carriere


Well I picked up my engine and noticed that on the exhaust side two brand new brass (Allen key) plugs had been tightly installed each in the oil output and oil return port of the engine block ...perfectly glued in with thread sealer or plumber's cement......

When I asked the expert they told me I could use the ports for an oil filter at a later date if I wished to do so..... but could test run the engine as is........

Bob C.

Bob, 261 engines used in Canadian pontiac cars have the same oiling system as the 235. If you put a jumper line across the pipe plugs in the block the oil from the pump will go directly into the oil pan and not to the engine. The 261 truck engine in the U.S. does have a "full flow" oil filter and has much larger oil lines than engines with the bypass type filter. How large are the pipe plugs in the block? If I recall correctly the plugs on the U.S. type engine are 3/8 pipe because all the oil must flow through the filter. Maybe Phil Waterman could post a picture of one of his 261 engines so that we could see the difference.

Paul