small block rear sump leak help

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TIB3300
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small block rear sump leak help

Post by TIB3300 »

Good evening chaps

Rebuilt the engine , but seem to have a leak from the rear of the sump, from the half moon part.

My question is, should I have used sealant as well?

Is there a way to stop it, apart from removing the sump?

Thanks :thumbright:

ps I do have an idea :working:
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Dave999
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Re: small block rear sump leak help

Post by Dave999 »

I used some silicone there

if the guts of the motor hang out below the pan rails on a 318 like they do on mine
then you have pan rail gasket up to the hump of the rear main seal housing and a strip of rubber that goes over the hump.
i used a smear of silicone on both sides of the rubber to stick it on and a decent squidge in each corner at the point where the card gasket butted upto the housing and rubber part

Dave
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MattH
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Re: small block rear sump leak help

Post by MattH »

That half moon seal is easy to dislodge, I had a huge leak from mine, as it had moved slightly when putting back on. Some sumps have the holes with pegs on the seal that locate it, like 5 small rubber fingers, others don't and they are easy to get them slightly nudged out of position when putting the sump back.
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TIB3300
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Location: Sheffield

Re: small block rear sump leak help

Post by TIB3300 »

Dave999 wrote: Fri Oct 15, 21 12:09 pm I used some silicone there

if the guts of the motor hang out below the pan rails on a 318 like they do on mine
then you have pan rail gasket up to the hump of the rear main seal housing and a strip of rubber that goes over the hump.
i used a smear of silicone on both sides of the rubber to stick it on and a decent squidge in each corner at the point where the card gasket butted upto the housing and rubber part

Dave
Sorry for the slow responce, I still have the leak. Thanks for the tip :thumbright:
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TIB3300
Posts: 608
Joined: Wed Oct 25, 17 10:14 am
Location: Sheffield

Re: small block rear sump leak help

Post by TIB3300 »

MattH wrote: Sat Oct 16, 21 12:02 pm That half moon seal is easy to dislodge, I had a huge leak from mine, as it had moved slightly when putting back on. Some sumps have the holes with pegs on the seal that locate it, like 5 small rubber fingers, others don't and they are easy to get them slightly nudged out of position when putting the sump back.
Thanks for the reply Yes I did see someone do that on youtube :thumbright:
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