Reproduction Parts for 1916-1964 Chevrolet Passenger Cars & 1918-1987 Chevrolet & GMC Trucks



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#224682 11/14/11 02:46 PM
Joined: Jul 2003
Posts: 521
Oil Can Mechanic
OP Offline
Oil Can Mechanic
Joined: Jul 2003
Posts: 521
My 55-57 235 engine sometimes looses all oil pressure. I have the type of oil pump with the floating arm; is this the correct pump and if not which one should I use? What would cause the pump to looses pressure on a hot day? The pump looks ok and performs normally most of the time. Is the float set too high?

ron


ron
Filling Station - Chevrolet & GMC Reproduction Parts


Filling Station


greencorn #224771 11/15/11 06:33 PM
Joined: Jan 2002
Posts: 30,701
Likes: 141
ChatMaster - 25,000
Offline
ChatMaster - 25,000
Joined: Jan 2002
Posts: 30,701
Likes: 141
The floating screen was used i 1955 only . Many caused problems (lost prime) when new and 1956 style pumps were installed under warranty.
If it were my car I would consider replacinng the pump and screen.....eaiser than replacing the crankshaft.


Gene Schneider
Chev Nut #224817 11/16/11 10:18 AM
Joined: Jul 2003
Posts: 521
Oil Can Mechanic
OP Offline
Oil Can Mechanic
Joined: Jul 2003
Posts: 521
Interesting, this is exactly what happened on my engine. I'll replace the pump and have to modify the oil pan baffle as the original oil pan will not allow a different type of pump to fit. Hope I didn't ruin the bearings. Thanks for this info.


ron

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