Engine builders- whats your preferred block sealant?
#1
Engine builders- whats your preferred block sealant?
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?
#2
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
Any sump sealant should do, but I wouldn't personally use bathroom silicone.
You use it everywhere, block, core plugs etc etc
Paul
#4
Scooby Regular
Join Date: May 1999
Location: SSO2003 2nd, SSO2005 1st, SSO2006 2nd, TACC Rd4 5th 4wd: In my car ;-)
Posts: 2,637
Likes: 0
Received 0 Likes
on
0 Posts
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.
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.
#5
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
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
#6
Originally Posted by 911
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
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
Last edited by torment; 11 March 2004 at 07:59 PM.
#7
Former Sponsor
iTrader: (4)
Join Date: Jul 2003
Location: @Junc 12, M40 Warwicksh; 01926 614522 CV33 9PL -Use 9GX for Satnav. South Mids Alcatek ECu dealer
Posts: 6,377
Likes: 0
Received 3 Likes
on
3 Posts
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.
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.
Last edited by APIDavid; 11 March 2004 at 09:08 PM.
Trending Topics
#8
Moderator
iTrader: (1)
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.
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.
Thread
Thread Starter
Forum
Replies
Last Post
MightyArsenal
Wheels, Tyres & Brakes
6
25 September 2015 08:31 PM