case sealants

[rick moe]

I switched to Yamabond about 5 years ago-after 25 years of trying every glue
out there-it does work well, but you must move quickly when assembling and surfaces must be perfectly clean and dry.

[pbs911]

Wayne, does Pelican sell any type of sealant at all? I must have spent an hour looking through every page of the on line catalog last night.

[Wayne 962]

I'm still working on the expanded rebuild section. If you search for 574, it comes up in the search engine...

-Wayne

[Wayne 962]

The problem with using all of these aftermarket sealants, is that no one really knows if they stand the test of time, and if they produce a thin enough seal to seal the cases.

Don't forget that there is no gasket between the case halves, so the sealant must be extremely thin there, otherwise it will affect the tightening, twist, and bearings within the case!

It is for this reason that the application process of the Loctite 574 is completely different than that of the Dow Corning 730 stuff. The Loctite should be spread evenly using an acid brush over all contact surfaces. The Dow 730 sealant needs only a very small, thin bead that is then compressed by the case. Laying on the 730 thick will produce too much thickness.

The bottomline is that you can just arbitrarily choose a sealant and use it without knowing in detail it's intrinsic properties. It may spread to thick, it may not compress enough, it may break down when in contact with aluminum or magnesium, or even motor oil. The Dow Corning 730 and Loctite 574 materials have been proven to work over the years - I wouldn't want to experiment with the case halves on assembly.

-Wayne

[Roland Kunz]

Hello

573 was replaced by 574.

Usually you use a little color roller to roll on a thin 574 layer on the surfaces.

Ther are always big questions if you have to apply it abouve the complete surface or only on the case-edges especialy when you come to the bearing #1 section ( flywheelend ) with the shuffle pins you have the sealer between the bearing. Some people then use sealing also over the complete case ( say all the other mains ) to achive a even hight.

The fine thing on 573/574 is that you can apply it very thin and it will not add to much thickness so it will not affect the bering galery.

So you can aplay it on the critical spots as well.

573 and 574 love good storage and some shaking up, massaging before use.
Stored wrong and to long it will sperate internal and work uneven on the surfaces later.

574 is also aviable packed in tubes from Würth.

518 is a more spreadable usage sealing but i think it will not outperform the 574 ( 518 does fills gaps better )

Grüsse

[Roland Kunz]

573 is/was green and 574 is colored orange

[Wayne 962]

Hi Roland. Not 100% correct, but close. The factory replaced 574 with 573 - both products are indeed still available from Loctite (according to their reps, and their website). The 573 is nearly identical to the 574 except it has a longer working time...

-Wayne

[Roland Kunz]

Hello

AFIR 574 was used on the head to camhousing in 88 on and from 89on it was used on the case as well. If you check your workshopmanual you will find the new loctite 574 descriped and Porsche recomened to use up all the 573 stock asap. Here in germany 573 is still listet. 573 has a much longer "open time" and will need longer to bond trough. It also doesn´t fill gaps as 574. AFIK the 574 was needed to speed up production process.

For professional use you can get the 57x series in retangular softbagcanisters with 2,5 L contens

574 can be substitutet with 5208

http://www.rolf-richter.de/html/flachendichten.html

http://www.loctite-europe.com/de/loctite_518.htm
http://www.loctite-europe.com/de/loctite_573.htm
http://www.loctite-europe.com/de/loctite_574.htm
http://www.loctite-europe.com/de/PRODUCTS/5208.htm


Grüsse