stuckwithgsx
15+ Year Contributor
- 341
- 2
- Sep 5, 2006
-
Phoenix,
Arizona
Ok I searched, and all the threads are inconclusive
I have a 7 bolt engine sitting in the car. I ordered an oil pump, it came in and I looked at the old one and the new one side by side, they looked the same. (looking at the passage ways and bolt holes to line up)
So I go to put this pump on and it bolts up perfectly, then I start putting the alternater back on and realize the bolt hole for that is about 1/4 to 1/2 inch off.
So I take pump back off, look at them again, and see no noticeable differences other than the "spacer" part for the alternater bolt.
I take both pumps to local welder/fab guy and have him chop off both "spacers" and I was going to use the bigger (correct size) spacer and just have an extra piece fall out every time I take out the alternater. No big deal.
Well the said "spacer" got lost. I found another ceased oil pump from a 7 bolt and plan on hacking that one up and using it.
When I was doing my searching someone said "if you use a 7 bolt oil pump on a 6 bolt block you need to drill holes into the block and pump" There was no further discussion stating where, why, how much, etc.
Also with this pump installed, and engine still put together, I cranked it over a few times to make sure it was priming and doing it's job. Needless to say with the valve cover off my hood got squirted with oil from the 2 oil passages on the drivers side of the head near the cam gears.
So I thought that was enough verification on making sure it's working properly. But i'm not positively certain.
The question. Can you use a 6 bolt oil pump on a 7 bolt block without issues?
The oil pump I have DOES have the holes tapped for the CPS. So I would imagine IF it was a 6 bolt pump it would not have those holes right? The pump description also said it would fit 4g64. Now I don't have any experience with 4g64 and the only difference I knew from 6 to 7 bolt on the pump was CPS.
The welder/fab guy kept the old pump for scrap alum, so I can't pull the new one off for comparison again.
I guess i'm just a little skeptical on this after thoroughly thinking about it now.
So does anyone know for sure on this? I got my head redone and picked it up today, ordered the felpro head gasket set (have mls but block hasn't been decked so it's going to wait) and i'm wanting to get this running this weekend.
Don't want oil starvation anywhere so any help would be awesome! Thanks
I have a 7 bolt engine sitting in the car. I ordered an oil pump, it came in and I looked at the old one and the new one side by side, they looked the same. (looking at the passage ways and bolt holes to line up)
So I go to put this pump on and it bolts up perfectly, then I start putting the alternater back on and realize the bolt hole for that is about 1/4 to 1/2 inch off.
So I take pump back off, look at them again, and see no noticeable differences other than the "spacer" part for the alternater bolt.
I take both pumps to local welder/fab guy and have him chop off both "spacers" and I was going to use the bigger (correct size) spacer and just have an extra piece fall out every time I take out the alternater. No big deal.
Well the said "spacer" got lost. I found another ceased oil pump from a 7 bolt and plan on hacking that one up and using it.
When I was doing my searching someone said "if you use a 7 bolt oil pump on a 6 bolt block you need to drill holes into the block and pump" There was no further discussion stating where, why, how much, etc.
Also with this pump installed, and engine still put together, I cranked it over a few times to make sure it was priming and doing it's job. Needless to say with the valve cover off my hood got squirted with oil from the 2 oil passages on the drivers side of the head near the cam gears.
So I thought that was enough verification on making sure it's working properly. But i'm not positively certain.
The question. Can you use a 6 bolt oil pump on a 7 bolt block without issues?
The oil pump I have DOES have the holes tapped for the CPS. So I would imagine IF it was a 6 bolt pump it would not have those holes right? The pump description also said it would fit 4g64. Now I don't have any experience with 4g64 and the only difference I knew from 6 to 7 bolt on the pump was CPS.
The welder/fab guy kept the old pump for scrap alum, so I can't pull the new one off for comparison again.
I guess i'm just a little skeptical on this after thoroughly thinking about it now.
So does anyone know for sure on this? I got my head redone and picked it up today, ordered the felpro head gasket set (have mls but block hasn't been decked so it's going to wait) and i'm wanting to get this running this weekend.
Don't want oil starvation anywhere so any help would be awesome! Thanks