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| Oil pump gasket https://www.ausmini.com/forums/viewtopic.php?f=2&t=100019 |
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| Author: | hpal [ Thu May 21, 2020 7:52 am ] |
| Post subject: | Oil pump gasket |
Hi all. Just a question about the oil pump gasket. It seems to me that the oil Pump gasket Could use trimming In the area outlined in red because it’s not squashed between two surfaces there. I know It probably doesn’t happen, But what if a piece of gasket were to break off and damage the pump or block an oil gallery? It’s just flapping in the breeze there, so I thought should I trim it to match the pump, Then all of the gasket is clamped between two surfaces and can’t go anywhere it shouldn’t. I’m sure people have thought this before when putting an engine together. Thanks. |
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| Author: | Morbo28 [ Thu May 21, 2020 8:11 pm ] |
| Post subject: | Re: Oil pump gasket |
I used some Permatex Aviation stuff to adhere it to the block, I would think it's unlikely it'll come off. I wonder, has anyone else made that mod? I can see why you suggest it [edit: I have idly wondered the same thing too]. Maybe the fact I haven't heard anyone doing that mod means it isn't necessarily? Sent from my Pixel 3 XL using Tapatalk |
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| Author: | Bill B [ Thu May 21, 2020 8:25 pm ] |
| Post subject: | Re: Oil pump gasket |
I don't have any real technical knowledge on this but I can offer my thoughts on your question: 1. these pumps and gaskets have been used on A series engines since the 1950s so any issues would have been identified by now (not always a foolproof argument); 2. the elongated chambers on the pump are not matched by a similar shape on the block face, so the gasket is supported on one face at least, so use a gasket cement; 3. the gasket material used seems to resist being compromised over time, as your photo shows; 4. reshaping the gasket might allow oil to drain out of the pump chambers when a tight seal is desirable. |
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| Author: | Goldbrocade_62 [ Thu May 21, 2020 8:40 pm ] |
| Post subject: | Re: Oil pump gasket |
I have pulled many a motor down and never seen a gasket problem |
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| Author: | hpal [ Fri May 22, 2020 8:26 am ] |
| Post subject: | Re: Oil pump gasket |
Something to ponder if nothing else. I actually talked to my local mini man yesterday about this and he's only experienced it once with a gasket that was more flexible than the paper one and a bit of it got stuck in the pump causing lack of oil pressure. Bill, that's an interesting point about the gasket maybe keeping some oil in the pump, I think I'll leave the gasket for now and use some sealant to seal it to the block so it can't come unstuck. |
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| Author: | fuzzy-hair-man [ Fri May 22, 2020 9:51 am ] |
| Post subject: | Re: Oil pump gasket |
I think I remember Vizard's yellow book talking about trimming the gasket as you suggest, it may have been another source though. |
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| Author: | fuzzy-hair-man [ Fri May 22, 2020 10:01 pm ] |
| Post subject: | Re: Oil pump gasket |
fuzzy-hair-man wrote: I think I remember Vizard's yellow book talking about trimming the gasket as you suggest, it may have been another source though. I've looked in both my books but I still can't find where it was mentioned. It might have been a Calvers article but I can't find it there either... |
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| Author: | drmini in aust [ Sat May 23, 2020 5:18 am ] |
| Post subject: | Re: Oil pump gasket |
I put a radius on the bottom edge of the outlet hole in my block and trimmed the gasket to suit. These paper gaskets go hard with age, I've never seen one break up. |
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