JB weld - Diesel Truck Forum - TheDieselGarage.com
Thread Details Posted by cajuncummins, this thread has received 7 replies and been viewed 1326 times.

LinkBack Thread Tools Display Modes
post #1 of 8 (permalink) Old 11-02-2007, 12:57 AM Thread Starter
Join Date: Jan 2009
Posts: 2,045
Points: 3,375
Thanks: 0
Thanked 7 Times in 7 Posts
JB weld

I need to seal some junk up on some hoses and fittings for our reactor and i hear tell the caustic nature of the chemicals can do a number on most sealants, we've got some pretty good stuff for our gaskets but for the stuff where gaskets won't work we jsut need some filler and i was wondering if JB weld would hold or do i need to get something really hardcore? any suggestions

Thanks, Josh
cajuncummins is offline  
Sponsored Links
post #2 of 8 (permalink) Old 11-04-2007, 10:13 PM Thread Starter
Join Date: Jan 2009
Posts: 2,045
Points: 3,375
Thanks: 0
Thanked 7 Times in 7 Posts
so i guess since no one's answered it hasn't been tried yet, ohh well, we'll find out after a few batches, just used it, it's hold most of our valves together so i guess it's a trial of fire, wish us luck
cajuncummins is offline  
post #3 of 8 (permalink) Old 11-04-2007, 10:16 PM
Posts: n/a
Points: 0 [Check]
reactor + JB weld, in the same conversation has me worried
post #4 of 8 (permalink) Old 11-04-2007, 10:52 PM Thread Starter
Join Date: Jan 2009
Posts: 2,045
Points: 3,375
Thanks: 0
Thanked 7 Times in 7 Posts
sooo yeah, umm fordt, that worries me a little, whatcha mean? :sofa
cajuncummins is offline  
post #5 of 8 (permalink) Old 11-14-2007, 04:43 AM
Senior Member
Join Date: Mar 2007
Posts: 1,836
Points: 19,198
Thanks: 69
Thanked 134 Times in 130 Posts
Well how else are you going to find out if it stands up to metholtrexate?

Exposing a small shape to straight metholtrexate and poking it every week or month to see if it is stable is another possibility.


93 Dodge /CTD, IC, 518, club cab LE, BHAF, KDP fixed, kelderman air ride
81 Isuzu /C223na, 5spd
keydl is offline  
post #6 of 8 (permalink) Old 11-14-2007, 10:31 AM
Senior Member
mattsn's Avatar
Join Date: Jan 2007
Location: maryland
Posts: 1,660
Points: 36,313
Thanks: 31
Thanked 50 Times in 47 Posts

you are making your own bio? im interested in looking into doing this for myself is there info out there i could find that you would recommend for me as to what i need and how to start?

'04 6.0, 4.5" lift, straight piped, SCT tunes by Innovative Diesel, studded, coolant filter, EGR delete Tru track in the rear, sounds by JL audio some other odds and ends
mattsn is offline  
post #7 of 8 (permalink) Old 12-09-2007, 11:01 PM
Join Date: Dec 2006
Location: High Point, NC
Posts: 168
Points: 61,801
Thanks: 6
Thanked 3 Times in 3 Posts
try collaborative biodiesel tutorial thats where i got started

1996 F 250 extended cab,4x4,7.3l auto trans,power adder cone filter, 3.5 inch straight exhaust, DFuser 18k mod.and veggie powered.
tommy vestrat is offline  
post #8 of 8 (permalink) Old 12-10-2007, 01:39 AM Thread Starter
Join Date: Jan 2009
Posts: 2,045
Points: 3,375
Thanks: 0
Thanked 7 Times in 7 Posts
ahhh, sorry mattsn, didn't se this until now, the first place I tried was journeytoforever, but it was bad, then on here there's a website called biodieslecommunity.org, or com, not sure, they helped out a lot to, but here's the proess ion a nutshell.

1 liter of used/unused oil
4 grams NaOH (sodium hydroxide=lye) or 1.4 times as much KOH(potassium hydroxide=also lye), try not to touch it too much
1/5 of a liter of methanol, and you need methanol, not ethalated methanol or methalated ethanol, it's gotta be pure, DO NOT screw around here, very dangerous, and I mean super dangerous stuff, really, blindness, death, and really explosive, ventilate wherever you're working

heat your grease to about 60*C and begin mixing. In a seperate, sealed container measure out the lye and methanol, limit the time exposed to the air because both of the chemicals are very hydrophilic, which means they take the water out of the air and mix with it, rendering them worthless, put them in a PET bottle, like a 2 liter bottle of coke, the lye should come in white pellets, when mixed with the clear methanol you now have methaloxide.

introduce this methaloxide to you grease and allow to mix for around 2 hours, maintain heat.

after this stop mixing and heating and wait a day, you will see a lighter probably milky fluid on top and a thick nasty lookin jank at the bottom, on top you have unwashed diesel fuel, on the bottom you have glycerin (bad stuff, be careful) get the glycerine out and if you have a compost heap it's good to use there.

Then you must wash the diesel, put 1/3 the quantity of fuel's worth of water in and mix, thoroughly, what you're doing here is introuing water to the fuel to ake out any remaining lye or methanol, beings that they're both hydrophilic, well you get it. After mixing allow to settle out, repeat this 2-3 times.

This step takes care of two things, if you have a bad reaction then you will get excess amounts of soap after this step, it's a solid-like white substance that forms when water comes into contact with unconverted tri- di- and mono-glycerides (unconverted grease) if you have this, then you did something wrong.

After washing three times allow a couple days to dry, this allows the water to evaporate leaving you with nic usable diesel, on the 7.3 forum there's a biodiesel thread that will help some too.

If you've used used grease, then you need to titrate to determine how much lye to use, check on the website for information about that

any larger size batch will use the same substance ratios and I didn't list any materials to use as vessels because that's all about what you have available, but at biodieselcommunity check out the appleseed, it's probably the best easiest way
cajuncummins is offline  

Quick Reply

Register Now

In order to be able to post messages on the Diesel Truck Forum - TheDieselGarage.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome