Two holes above oil filter?
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Joined: Jan 2003
Posts: 217
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From: Garibaldi Highlands, B.C., Canada
Car: '88 IROC Convertible
Engine: ZZ4 TPI
Transmission: 5 spd.
Two holes above oil filter?
Swapping out my 305 to a ZZ4.
Moving needed parts to the new ZZ4 I see there are two holes right above the oil filter boss; I know that the lower one is for the oil pressure sending unit but what is the other one for?
The second hole looks as though it goes into the block a fair distance, it does not appear that the same hole on the 305 ever had anything to it.
Moving needed parts to the new ZZ4 I see there are two holes right above the oil filter boss; I know that the lower one is for the oil pressure sending unit but what is the other one for?
The second hole looks as though it goes into the block a fair distance, it does not appear that the same hole on the 305 ever had anything to it.
Thread Starter
Member
Joined: Jan 2003
Posts: 217
Likes: 0
From: Garibaldi Highlands, B.C., Canada
Car: '88 IROC Convertible
Engine: ZZ4 TPI
Transmission: 5 spd.
So, dumb questions numbers two and three...does that hole extend into the water jacket or oil passages?
Should it be plugged?
Should it be plugged?
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