The manual says three bond 1215 but will any silicone based sealant do it? Also I think I've heard some gotcha about the bolt holes and sealant mentioned in the past or maybe I'm losing it. Can I use the same goo for sealing the oil gallery and circlip access plugs etc etc?

 

I use loctite Blacktite, which also has a numerical name. Essentially it's a silicone loaded with other stuff to make it more resistance to oil in use and during cure. It also cures completely with heat.

Any sump sealant should do, but I wouldn't personally use bathroom silicone.

You use it everywhere, block, core plugs etc etc

Paul

 

Cheers Paul lol at bathroom sealant, actually I have got some of that left over.................

 

Tip, Use it sparingly. "More" isn't better.

It's CRITICAL to make sure that excess sealant doesn't break away from the block, and block oil ways.

Also take particular care when puting the sealant onto the bearing webs (mains). There's a channel behind the bearings, that can easily get blocked. A small amount smeared with a finger is the best way.

Mark.

 

A Porsche 911 engine is very similar to a Scooby engine, and they reccommend a very special Loctite 471 I think, but I last did a 911 engine 8 years ago..
The sealant cures with the exclusion of air, so you have all the time in the world to apply it sparingly and very carefully round the case through bolts. Done right it is leak free. Costs a fortune, available from Porsche specialists and Dealers (2xthe price!)
It does work.
911

 

HALFRAUDS,Do this type of sealer....Its airobic,It only sets in the total absence of air...I prefer this,As it stops the oil pickup pipe from getting blocked,And stalving the engine of oil,The slight overspill just dilutes away .I have tried leaving a spot of this stuff out for days,And i dosent go hard,From halfrauds its available in small (i think)clear tubes,About the large size super glue bottle-The substance inside is orange in colour...Brilliant stuff...Kev.

 

We use Subaru 3 bond. It used to be really expensive and nobody bought it. They brought the price down and the sales went up. It's also good in cases where someone from IM may inspect at a later date. They cannot say that the 'wrong' sealant has been used.

David API

Can't disagree with any of the comments above about 'use sparingly' There is nothing worse than a component dripping in some 'orrible sticky gunge that has got everywhere it shouldn't.

Bathroom sealer is actually not as bad as it is made out to be. I observed a Mclaren engineer rebuilding a transmission some years ago and asked what he was using as a sealer. 'Corning bathroom sealer' he says 'It's the best !! ' I kid you not.

 

On engines I don't give a stuff about I've used bathroom silicone sealer, or GP automotive silicone sealer (basically same stuff just a little more tolerant to heat/oil and petrol), instead of bothering ordering, waiting for gaskets to arrive that'll probably leak anyway. Mainly just sumps and rocker covers.

But yes, the use "sparingly" and practice "icing the cake" I just this week took apart an engine where the previous owner loved to use sealer on all the joint faces, suffice to say, I found strings and lumps of the stuff all over the place.

Also had to deal with a golf 1.8T with oil pressure problems: It was due to excess sealer which had come adrift somewhere and blocked the oil pickup.