Sealing case,covers etc

[outsider347]

About to start my 3.0 rebuild. Most all of the aluminum will be bead blasted and wondering what the suggested coating/sealer is?
Tks gents.
ed

[Speedy Squirrel]

You'll be wanting this thread:

The Complete Engine Sealant Thread...

[al lkosmal]

I have been using the sealant kit from Supertec. Works very well! Available from Pelican.

https://www.pelicanparts.com/cgi-bin/ksearch/PEL_search_2016.cgi?command=DWsearch&description=sealant+kit

regards,
al

[Jeff Alton]

Are you looking for suggestions on what sealants to use while assembling, or what sort of coating (if any) you should use to protect the newly media blasted parts??

Cheers

[Trackrash]

So you are going to have ALL the motor parts bead blasted? Case, valve covers, cam housings, etc?

That is a matter of debate. Personally I would not bead blast my motor parts. Yea, the pros do it 'cuz it is fast and it gets things clean. Probably OK for heads. But a friend of mine, who runs a machine shop specializing in air cooled stuff with over 30 years of experience, showed me some heads that someone bead blasted. The seating surfaces were so rough that he was going to have to machine them in order for them to seat. Now, if the correct size of bead is used, the beads are not old and fractured, the correct pressure is used and the operator knows what he is doing, well you will probably be ok.

There are other ways to get the parts clean and polished. Then use Gibbs to protect.

[outsider347]

Apologies guys. I guess that my question was not very clear

Wondering what to apply to the exterior aluminum surfaces post bead blast

FYI I followed Wayne s suggestions which parts were safe to bead

Looking forward to getting my 3.0 back together

Tks for your suggestions & Have a great Holiday
ed

[proporsche]

outsider as trackrash said .....also have a look here ..that is using the proper engine case loctite 574.
I do it like this for many many years..my technique...

Ivan
https://www.youtube.com/watch?v=ZoOEFOkC2aA
this the only amount you need to apply to the case..
https://www.youtube.com/watch?v=IandhtwG5no
and cylinder heads
https://www.youtube.com/watch?v=STWf7WnC4xo

[cgarr]

spray it down with some Gibbs

[outsider347]

Craig
Do you spray the engine down after its assembled? or each part individually?
tks
ed

[cgarr]

I do some of the parts I rebuild like head sealing surfaces then sent to the customer, but if I was building an engine I would do it after assembled unless the parts are in storage for awhile.

[Cobalt]

I would reconsider bead blasting the outside of any factory finished parts unless they are badly corroded. The as cast surface has an oxide layer that helps protect it from the elements. Once removed it will be far more susceptible to corrosion. This especially applies to mag.

If you need to blast you will need a good wash primer followed by a matt clear coat. Sikkens makes some nice products but you will need a pro to do them properly.

Here is a 3.2 intake a friend of mine just did.

[Cobalt]

I should have suggested if you have access to a vapor degreaser that always works well. My case was a mess prior to degreasing.



My tranny was already heavily corroded and the oxide layer destroyed. After a bit of cleaning I hit it with Sikkens spray wash primer in a rattle can followed by Por 15 aluminum paint also in a rattle can. After a week I sprayed brake cleaner on it and it was not effected. I prefer the clean oxide finish but this is OK. I wasn't about to pull the entire tranny apart to bead blast and have my friend paint.