how much silicone to seal the sump?

[TVR Beaver]

Called in my mates over the weekend to see him re-fitting a sump on a punto.. no gasket in there just RTV silicone... it said on the tube (right stuff for the job) to put a 8mm bead around the floange.. on bolting this up, it pushed a far bit out of the joint on the outside, so the assumption is it did the same on the inside?... okay, he left it 24 hours before putting oil in so it was fully cured... and if you get a bit of this stuff once it's gone off, its very hard to pull it off cleaned metal or even pull it apart... but whats your thoughts on having 'bid beads' of this inside the engine?.. it can olyl get in the oil pickup if it comes off.. but will it ever come off?...

[TVR Beaver]

not sure if it would break away.. at least not until it had been in there for some time and became hard so it would snap off?... but that siad, how do engines get trashed due to blocked pickups?.. maybe they don't let it cure or they use non-setting seal??...

[TVR Beaver]

Tyre Tread said:

Have a look on the Chimaera forum and ask Siliconekid about it - Any guesses how he got his name?

Yes.. I know Daz.. and its this that made me think he was using too much... But also knowing Daz.. what else did he do?.. and did he let is cure??
Got to say, a sample run I did on a un-cleaned washer stuck like mad after 24 hours and I could not pull it apart or snap the bead?...

the sump he took off had the same sealer on it.. and it was still flexable and you could not pull that in bits either...

The sump had rusted through thats why he was doing it.. only 40K on the car... appears to be a commomn problem!!

[TVR Beaver]

In places its stuck out 8mm. Mmmmmm ?

[TVR Beaver]

if it were a flat face I’d make a gasket... but it aint... it goes around the crank both ends so it’s not possible....

I suppose it depends on the RTV used also.... if it fully cures / remains flexible / how good it is at sticking to clean metal... I’ve used some RTV before that just peels off.. but this stuff does stick like **** to a blanket !

[TVR Beaver]

no.. it seals around the end cap.. which I guess holds the seal if you look end on....

[TVR Beaver]

Is this on a pressed sump or cast sump. The Punto one is deep pressed and has about 1mm deep indents around the flange between the bolts to make it stiffer. You must at least fill these.