#1  
Old 12-20-2022, 12:48 PM
Doctor john Doctor john is offline
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Default Oil leak

On my 1966 Sprint I noticed oil on the bottom of the oil pump cover, so at my next oil change I replaced the paper gasket and used Permatex high tack as well as thread sealer on the bolts. Now I still notice oil there as well as on the bottom of the accessory housing and the bottom of the fuel pump. I will replace the fuel pump gasket, but how likely is it to leak oil? I don't think it's the oil pressure sender as oil is appearing above that. I don't see obvious leaks where the accessory housing bolts to the block.

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Old 12-20-2022, 07:20 PM
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Sounds/seems like it's the mating gasket(s) for the ACC housing to Block, a very common spot/issue.
Also double check the Oil Filter

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Old 12-20-2022, 07:24 PM
Doctor john Doctor john is offline
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Any tips on sealing the accessory housing? I think it has 2 gaskets, one on block and on on housing. I know they need to slide over each other to adjust timing belt tension.

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Old 12-20-2022, 08:37 PM
jrunner jrunner is offline
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Default Oil leak

I cracked my accessory housing above the oil sending unit by screwing it in too far. I had to clean everything and then was able to see the crack. I hope yours isn’t cracked because I tried everything to patch it and with no luck I ended up replacing the housing. Good luck my leak drove me nuts.
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Old 12-20-2022, 08:48 PM
Doctor john Doctor john is offline
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Ok thanks I'll look for a crack

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Old 12-21-2022, 06:42 AM
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If it does seem to be mounting gasket related the only fix is to re-mount the housing with fresh gaskets.

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Old 12-21-2022, 07:45 AM
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Lap the gasket surface of the housing on something flat covered with self adhesive sand paper. Get it perfectly flat and smooth. Use a dremel wire brush or something similar on the engine side.

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Old 12-21-2022, 09:12 AM
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I also found that Spraying both sides of the gaskets with non stick cooking spray like "PAM" works well and lets you actually loosen and retighten the accessory housing without a leak for at least a few years of service. Like when adjusting or changing the timing belt or cam cover.
I was at the time trying out several camshaft grinds "B", "E", "H", "WH", and a couple of custom grinds so I was swapping cam covers at the track between runs. Never had a leak or tore a gasket after spraying them with PAM.

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Old 12-21-2022, 09:38 AM
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Did you use any rtv or similar in the sides that don't slide over each other?

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Old 12-21-2022, 07:27 PM
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Thumbs up FWIW

Lots of ways to go about it and lots of good advice.

Here is something I put together a while back for our Newsletter and the method I have used many times over with great results.

Cheers.
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When I die, I want to go peacefully like my grandfather did, in his sleep.
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Old 12-21-2022, 07:39 PM
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Thank you!

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Old 12-21-2022, 10:07 PM
66sprint 66sprint is offline
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Quote:
Originally Posted by Doctor john View Post
Any tips on sealing the accessory housing? I think it has 2 gaskets, one on block and on on housing. I know they need to slide over each other to adjust timing belt tension.
Just to be clear - there is only one set of gaskets between the Accessory housing and the block surface -not two.

There is the big square one for the main body and the little one for the front.
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Last edited by 66sprint; 12-21-2022 at 10:13 PM.
  #13  
Old 12-22-2022, 08:52 AM
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So the larger gasket gets sealed to the housing and the smaller rounded one to the block? No other gasket is used?

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Old 12-22-2022, 11:23 AM
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No if you are going to seal them, I would seal both to the housing only. But I never used sealant on them, it was never an issue unless they stuck in place (to both the block & housing) and then the housing was loosened when changing or adjusting the timing belt. Then they tear and can cause a slight to very large oil leak!

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Old 12-22-2022, 02:08 PM
Hokie1984 Hokie1984 is offline
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I use a large fine file to knock off any high spots in the housing as well as the block before installing (gently like you are filing a carburetor horn). I have had the best luck installing them without any sealants, not sure why unless the sealant promoted tearing the gasket when you tighten the belt.

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Old 12-22-2022, 04:26 PM
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Quote:
Originally Posted by Doctor john View Post
So the larger gasket gets sealed to the housing and the smaller rounded one to the block? No other gasket is used?
I don't think either way is wrong,
I just choose to "paste" the smaller gasket to the block Vs the Housing only to keep the coolant passage hole absolutely centered.
I have found this to work well.

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Old 12-23-2022, 05:36 AM
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That should have read OIL PASSAGE not coolant, sorry about that.

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