Differences
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techtalk:ref:oil06 [2019/05/16 23:48] hippysmack [Oil Pump Covers] |
techtalk:ref:oil06 [2019/05/24 14:54] hippysmack [Oil Pump Covers] |
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==== Oil Pump Covers ==== | ==== Oil Pump Covers ==== | ||
+ | **86-90 cover on 77-85 pump body**: \\ | ||
Installing an 86 cover on the 77-85 oil pump creates problems. \\ | Installing an 86 cover on the 77-85 oil pump creates problems. \\ | ||
77-90 oil pump covers look identical from the outside. \\ | 77-90 oil pump covers look identical from the outside. \\ | ||
- | The visual difference is that the 77-85 pump has an oil pressure switch on the front and the 86-90 pump has a hose fitting there. \\ | + | The only visual difference on the outside is that the 77-85 pump has an oil pressure switch on the front and the 86-90 pump has a hose fitting there. \\ |
Take the fittings off the ends and it looks as if they would be interchangeable. \\ | Take the fittings off the ends and it looks as if they would be interchangeable. \\ | ||
The factory oil fittings are different which can give clues to the year model used on. \\ | The factory oil fittings are different which can give clues to the year model used on. \\ | ||
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This is the oil feed hole to the engine on 77-85 engines. \\ | This is the oil feed hole to the engine on 77-85 engines. \\ | ||
86-90 oil pumps route the feed out to an external oil filter and back into a separate cavity in the pump body to feed the engine. \\ | 86-90 oil pumps route the feed out to an external oil filter and back into a separate cavity in the pump body to feed the engine. \\ | ||
- | (so the feed hole in the arm is not needed on them) \\ | + | (so the feed hole in the arm is not needed in the cover on 86-90 pumps) \\ |
+ | 86-90 engines are fed oil from a passage in the pump body instead of the cover. \\ | ||
| 77-85 covers w/ feed hole in arm. ((photo by Hippysmack)) | 86-90 covers without the feed hole in the arm. ((photo by Hippysmack)) | | | 77-85 covers w/ feed hole in arm. ((photo by Hippysmack)) | 86-90 covers without the feed hole in the arm. ((photo by Hippysmack)) | |