Crack repair - Moparts Forums

Register Log In Moparts Forums Unlawfl's Race & Engine Tech Crack repair

Print Thread

Page 2 of 2

1

2

Re: Crack repair [Re: Pacnorthcuda] #3261747 10/03/24 02:27 PM 10/03/24 02:27 PM
Joined: May 2012 Posts: 1,932 South Bend John Brown top fuel
John Brown top fuel Joined: May 2012 Posts: 1,932 South Bend	Originally Posted by Pacnorthcuda Originally Posted by John Brown Sodium Silicate aka Water Glass. That’s Obama’s cash for clunkers juice. I realize you’re not talking about putting it in the crankcase, but still…… Not in crankcase... put it in the radiator instead. Used to buy it at drug stores back in the 60's, but probably not any more. July 19th should be "Drive Like Rockford Day". R.I.P. Jimmie.

Re: Crack repair [Re: John Brown] #3261844 10/03/24 11:46 PM 10/03/24 11:46 PM
Joined: Aug 2003 Posts: 44,079 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 44,079 Bend,OR USA	I remember some old time (1960-1970s) gas station, AKA "Service Station" mechanics using pepper in the radiators as a stop leak sealer I'm thinking around a tablespoon or so is what was recommended and used back then in regular size big cars with V8 Last edited by Cab_Burge; 10/03/24 11:47 PM. Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Crack repair [Re: A727Tflite] #3261870 10/04/24 07:20 AM 10/04/24 07:20 AM
Joined: Apr 2003 Posts: 13,259 aZLiViN J J_BODY I Live Here
J_BODY I Live Here J Joined: Apr 2003 Posts: 13,259 aZLiViN	I’d figure up a way to pressurize the head. Fill the cooling passages with the aforementioned sodium silicate mixture and let it sit for awhile hoping the mixture permeated the crack. Empty and let dry. Last line of defense after that would be some Belzona 1111 epoxy.

Re: Crack repair [Re: J_BODY] #3261876 10/04/24 07:54 AM 10/04/24 07:54 AM
Joined: May 2012 Posts: 1,932 South Bend John Brown top fuel
John Brown top fuel Joined: May 2012 Posts: 1,932 South Bend	Sodium Silicate doesn't work that way. It needs heat to set. Wiki says it has to reach over 200F to harden, then after it sets, it's good to 800F. https://en.wikipedia.org/wiki/Sodium_silicate July 19th should be "Drive Like Rockford Day". R.I.P. Jimmie.

Re: Crack repair [Re: A727Tflite] #3262001 10/04/24 03:56 PM 10/04/24 03:56 PM
Joined: Dec 2005 Posts: 207 ohio prochamp enthusiast
prochamp enthusiast Joined: Dec 2005 Posts: 207 ohio	i have repaired a few heads with a trick I picked up from some older ss ford racers I know running 427 t-bolt.. you have to have the head off the motor to do it but it works.Bowling ball epoxy..you mix it up and pour it in the coolant passages and turn the crack down so as to let it run in behind the crack it sets up like hard plastic...

Re: Crack repair [Re: prochamp] #3262014 10/04/24 05:32 PM 10/04/24 05:32 PM
Joined: Mar 2011 Posts: 3,254 Michigan A A727Tflite OP master
A727Tflite OP master A Joined: Mar 2011 Posts: 3,254 Michigan	Originally Posted by prochamp i have repaired a few heads with a trick I picked up from some older ss ford racers I know running 427 t-bolt.. you have to have the head off the motor to do it but it works.Bowling ball epoxy..you mix it up and pour it in the coolant passages and turn the crack down so as to let it run in behind the crack it sets up like hard plastic... Interesting reading about this. I’m going to look in to this further. As it turns out I got a reprieve - customer has another head. So we have time to fix the defective unit. K heads are not easy to find these days.

Re: Crack repair [Re: A727Tflite] #3262034 10/04/24 07:19 PM 10/04/24 07:19 PM
Joined: Jan 2003 Posts: 18,066 S.E. Michigan ZIPPY I Live Here
ZIPPY I Live Here Joined: Jan 2003 Posts: 18,066 S.E. Michigan	The car manufacturers mostly use vacuum impregnation. Alot of brand new vehicles are built with parts that had porosity problems but were otherwise ok, and were repaired by a vendor before being bolted on. Especially common on cylinder heads and transmission cases. Somewhere out there, there is probably someone who would take on small jobs for a hobbiest and I'd like to find that person/company. https://www.godfreywing.com/blog/understanding-vacuum-impregnation-animation-video https://www.ultraseal-impregnation.com/us/2019/10/07/casting-impregnation/ https://next.henkel-adhesives.com/us/en/articles/vacuum-impregnation.html https://www.sharrettsplating.com/additional-services/vacuum-impregnation-services#:~:text=Vacuum%20impregnation%2C%20also%20known%20as,micro%20porosity%20and%20macro%20porosity. Rich H. Esse Quam Videri

Re: Crack repair [Re: ZIPPY] #3262057 10/04/24 09:42 PM 10/04/24 09:42 PM
Joined: Mar 2011 Posts: 3,254 Michigan A A727Tflite OP master
A727Tflite OP master A Joined: Mar 2011 Posts: 3,254 Michigan	Originally Posted by ZIPPY The car manufacturers mostly use vacuum impregnation. Alot of brand new vehicles are built with parts that had porosity problems but were otherwise ok, and were repaired by a vendor before being bolted on. Especially common on cylinder heads and transmission cases. Somewhere out there, there is probably someone who would take on small jobs for a hobbiest and I'd like to find that person/company. https://www.godfreywing.com/blog/understanding-vacuum-impregnation-animation-video https://www.ultraseal-impregnation.com/us/2019/10/07/casting-impregnation/ https://next.henkel-adhesives.com/us/en/articles/vacuum-impregnation.html https://www.sharrettsplating.com/additional-services/vacuum-impregnation-services#:~:text=Vacuum%20impregnation%2C%20also%20known%20as,micro%20porosity%20and%20macro%20porosity. When we had to source new piston retainers for the Reman program we had them impregnated 100%. Yes, would be nice to find a shop that would deal with small time buyers.

Page 2 of 2

1

2

Moderated by Al_Alguire, Hotwheelsjr, moparts, not_a_charger, RangerDan440, tboomer

Hop To

Powered by UBB.threads™ PHP Forum Software 7.7.1