Cracked LS1 block
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Teching In
Joined: Mar 2006
Posts: 2
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Cracked LS1 block Hi guys I have just discovered a crack in my TT LS1 block. It is in a bit of an unusual place as it is in behind the starter on the lower side of the block (see pics). The only thing it is doing is leaking water (no water in the oil and engine runs fine!). I am just wondering if anyone else has had 1 crack here, what may be the cause and should I just weld it up? The engine has about 4000 miles on it, has a head stud kit and runs up to 20lbs (a lot I know! though not often)
Any input would be appreciated.
Any input would be appreciated.
Teching In
Joined: Jan 2011
Posts: 37
Likes: 0
Seems like the best thing to do is weld it to stop the leak. But you got to wonder, what cracks you can't see on the inside. Swapping for a new block might sound extreme but on a boosted engine you don't want to take any chances.
If you just TIG weld it from the outside and the welder gets good penetration (like they should) there's a damn good probability that that stud will not be coming out. May be a good cheap fix.
Could remove the head. Weld and then redrill/tap that head stud hole.
Also looks really close to that water plug there. Might have to remove it to weld the crack and clean it up before putting it back in.
Hard to say how long it will last.
Could remove the head. Weld and then redrill/tap that head stud hole.
Also looks really close to that water plug there. Might have to remove it to weld the crack and clean it up before putting it back in.
Hard to say how long it will last.
looks like your losing some coolant fromt he coolant plug right there as well. I wonder if it isnt more damaged then it appears. IMO if you spend the time now to swap out the block, at least you can salvage all the internal parts....if the block cracks during a run you might not be able to save a damn thing inside that engine.
