Dave Robsons Challenger R/T

Ivor · Post by **Ivor** » Mon Aug 09, 10 12:40 pm

Excuse the buzzword, but thinking out of the box how about running a heat resistant two pack epoxy sealant around the inside of the waterways in the heads?

I know the stuff works, because I've used it on an Austin Seven modified for racing...just a thought...

Dave-R · Post by **Dave-R** » Mon Aug 09, 10 12:49 pm

What sort of sealant is that? Where would I find it?

Ivor · Post by **Ivor** » Mon Aug 09, 10 1:06 pm

I'll have to have a dig through my old bills and stuff Dave and see if I can find out where I got it.

latil · Post by **latil** » Mon Aug 09, 10 1:12 pm

Kalimex might do the trick.

Dave-R · Post by **Dave-R** » Mon Aug 09, 10 1:23 pm

This stuff?

http://www.kalimex.co.uk/section.html?s ... 03.&pgid=2

Or this?
http://www.kalimex.co.uk/section.html?s ... 4.&pgid=17

latil · Post by **latil** » Mon Aug 09, 10 1:32 pm

The first one of your links (brown bottle). Just noticed their office is about 15 miles from me

Dave-R · Post by **Dave-R** » Mon Aug 09, 10 1:36 pm

Seal-Up or K-Seal®?
What is the difference between Seal-Up and K-Seal®?

Seal-Up is the original cooling system formula and is based on Sodium Silicate technology. This is very effective at sealing leaks throughout the cooling system but it has one drawback. If Seal-Up mixes with antifreeze and is heated then a reaction can occur leading to coagulation of the compounds in the cooling system and potentially causing blockages. As a result it is essential that the system is drained before and after treatment (as per the instructions on the product). It is not necessary to use any special flushing products but some users like to run water through the system after draining it.

K-Seal® is a newer formula which has proved to be as effective as Seal-Up but has the added advantage of being compatible with all known types of antifreeze. As a result the product can be added directly to the cooling system without any special preparation. It can even be used as a preventative additive where no problems are present.

We continue to stock both products because Seal-Up still has an excellent reputation and loyal customer base with the trade. K-Seal® is now by far our most succesful product and has become popular with the general public, trade and many enthusiasts clubs.

Ivor · Post by **Ivor** » Mon Aug 09, 10 1:37 pm

I have to admit, that one is new to me! The stuff I used was called bond something or other, I just poured it into the waterways, rotated it about for good coverage and let the excess drip out.

I can't remember whether or not it went into the oven for curing, but it never leaked or pressurised the cooling system again!

Dave-R · Post by **Dave-R** » Mon Aug 09, 10 1:47 pm

That K-Seal sounds like it is worth a try at least. If it works I will be not just over the moon, I will be way way way over the moon.

latil · Post by **latil** » Mon Aug 09, 10 1:56 pm

Got to be worth it

I guess too many people forgot to drain out the seal up

The K seal is for a one stop job.

jerry · Post by **jerry** » Mon Aug 09, 10 5:23 pm

Could you not use a Devcon style steel putty ? You would have to grind crack wider & deeper to ensure could adhesion.

Devcon make numerous fillers which can withstand incredible temps, just a thought

latil · Post by **latil** » Mon Aug 09, 10 5:46 pm

Devcon is a possibillity,though if the head is porous,not cracked it won't be so easy,whereas the Kalimex is a "seek and block" product. I think RS do most Devcon products,got our last cold casting urethane there.

Wolfman · Post by **Wolfman** » Mon Aug 09, 10 6:33 pm

Dave wrote:That K-Seal sounds like it is worth a try at least. If it works I will be not just over the moon, I will be way way way over the moon.

I have used the k seal on 2 applications. First one was a weeping head gasket, into number 4 cylinder on my cavalier. The 2nd one was on my motorhome with the 360 in, the timing cover gasket was weeping down the front of the engine, it had been like that for 10 years and it sorted that one out too. ANd my brother used it in his heater matrix on his cavalier. SO it's got to be worth a go.

AllKiller · Post by **AllKiller** » Mon Aug 09, 10 6:56 pm

I did mention before but magnafluxing the head will find the crack or damage... regardless of hot or cold under pressure or not. most reputable engine builders do it on rods etc

challenger · Post by **challenger** » Mon Aug 09, 10 7:12 pm

Dave wrote:That K-Seal sounds like it is worth a try at least. If it works I will be not just over the moon, I will be way way way over the moon.

i used k.seal on the last pair of (906) heads i had on but that was after it had been welded

as there was still a small weep it certainly helped slow it down but never fully sealed the crack just under the ex ports (centre) now i have these hauser built (906) heads on, i now have the same again a crack has appeared on one head in exactly the same place

but mine only weeps when cold i,m just about done with 906,s will see if i can sort some ally heads when over the states in october, hope it works for ya dave