I am working on adapting the 1991 735i engine to fit my coupe. Should one use the entire oil pump assembly (including sprocket and chain) from the 3.0 engine on the 3.5 engine? Or, can one use the main body of the 3.5 oil pump with the "suction arm" from the 3.0? It seems that replacement parts for the 3.0 pump are hard to find. The original pump from the 3.0 has about 115k miles on it. Obviously it will need to fit the 3.0 oil pan.
Also, has anyone used the oil pump chain tensioner from the newer engine with the larger oil pump sprocket from the 3.0?
Here are some photos of the two engine bottoms and oil pans.
As an aside, the oil filter housing on the newer engine sits up high and is easily accessed from the top of the engine. Remove the lid, lift out the filter - no mess. I probably will not use it since is will make the engine bay look less original. I already have Carl's top bolt filter housing on the 3.0 which works ok.
1972 pump:
1991 pump:
Pans (1972 is the lower pan):
Thanks,
Also, has anyone used the oil pump chain tensioner from the newer engine with the larger oil pump sprocket from the 3.0?
Here are some photos of the two engine bottoms and oil pans.
As an aside, the oil filter housing on the newer engine sits up high and is easily accessed from the top of the engine. Remove the lid, lift out the filter - no mess. I probably will not use it since is will make the engine bay look less original. I already have Carl's top bolt filter housing on the 3.0 which works ok.
1972 pump:
1991 pump:
Pans (1972 is the lower pan):
Thanks,