cracked block

colo iron · Jan 27, 2015

I have a SO case with a cracked block behind the Carb. What methods have you used to repair or is it possible to repair

HossinMe · Jan 27, 2015

Ive used j-b weld with good results.Wants to be real clean! Hoss

bcdave · Jan 27, 2015

I receive a paper call FARM SHOW and in the last issue there is a welding rod called Magna 777 for welding cast. Has anyone tried it on a block? I have a C that has a cracked block.
Dave

dick benson · Jan 27, 2015

If you can't repair it, I have a good 1950 SO block. Dick

Den N Ms · Jan 27, 2015

Colo iron,There is a new welding rod for cast iron blocks now out called Muggyweld 77.I haven't tried them yet and kinda spendy 14 rods for about $76.00.My self I wouldn't electric weld on a cast iron block because it hardens the cast next to the weld.I have used brass and a oxyacetylene torch,preheat,braze and cover with a heat blanket and had good luck with it.But the best repair is Lock and Stitch.I have used it to repair many cracked blocks with excellent results.
Muggyweld 77

Lock and Stich

FarmerHR · Jan 27, 2015

A Ford NAA that resently joined our farm had a crack in the block betwwen a freeze plug and the oil filter mountong about 3 inches long. It was a fine crack that did not leak much coolant. I drained the block then washed out the crack with alcohol, lacquer thinner, and acetone from a very fine suringe needle. I then painted loctite hydrolic sealer over the crack until it would adsorb no more. Cleaned the surface up good then but JB Weld over the crack. So far so good but it has only about five months old.
Hope this helps.

CKain(MI) · Jan 28, 2015

A crack behind the carb. Usually from a freeze up ?
If so, it may have internal cracks. I have had two, one I did not try. One I repaired the surface, then found new coolant going right into the oil from internal damage.. Also head was cracked. Luckily, I found a decent DC at local scrap yard and switched out the engine. Good Luck...

Lazy WP · Jan 28, 2015

Make sure its clean and either Braze it or J-B Weld it.
We had a SC that didn't get drained, cracked the block like that, and ran it for well over another 10,000 hours. It was our pump unit on a well.

L.Fure · Jan 28, 2015

If you do decide to weld the crack make sure you drill a small hole at either end of the crack. Otherwise you'll be chasing the crack across the block with the weld.

I saw a crack that was repaired with the pin and peen method. You start out by drilling a 1/8" hole at the end of the crack. Thread it with a tap, then take a brass wire and thread that. Screw the wire in as far as it will go and cut it off about a 1/8" long. Drill the next hole close enough to the first pin so that the tap leaves threads along it's length. Then add the next threaded pin into that hole. Keep that up until you have the crack covered. Take a ballpeen hammer and peen all the pin ends.

17andcollectingcases · Jan 28, 2015

Hey Im in the same boat I have a Case SC with the crack behind the carburetor I'd love to see a picture of yours

01gentdc · Jan 28, 2015

rays cracked block , hodgenville ky // googlre him ,and talk with him ,, he just fixt mine ,, never used heat ,,fine job

01gentdc · Jan 28, 2015

yes,,,lock and stich,, the only way to make alasting repair ,used a similar product ,.. excellent results

Earl-IL · Jan 29, 2015

IRONTITE or LOCK & STICH are the drill & plug system I have used for years. They are a cast tapered plug. Look up their Webb.

standard fan · Jan 30, 2015

Every once and a while someone asks this question and there will always be at least a few experts that have never repaired a block that will reply. The lock and stitch method works good and is probably best for someone with little or no experince in welding cast. If you are going to weld it please take it to a profesional and ask to see example of previous repairs as there are many self proclaimed experts who can make a small crack a huge one in a hurry. A block needs to be welded very slowly with a nickel or specialty cast electrode and should absoulutely never be brazed or pre heated unless it can be brought up to temp slowly and evenly like in an oven and then brough back down to temp slowly and evenly.

cracked block

colo iron

New User

HossinMe

Member

bcdave

Member

dick benson

Member

Den N Ms

Well-known Member

FarmerHR

Member

CKain(MI)

Well-known Member

Lazy WP

Well-known Member

L.Fure

Well-known Member

17andcollectingcases

Member

01gentdc

Well-known Member

01gentdc

Well-known Member

Earl-IL

Well-known Member

standard fan

Member

Similar threads