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My LT1 build is slowly coming around. Here is a quick recap, I grenaded the 'ol LT1 5.7 in October '09, I then picked up another used but clean LT1. This motor after tear-down had a spun bearing which I thought would turn out, but my machinist felt it would need a .030 cut. So I now have a new crank in it. The block was clean enough that I was able to stay with the stock bore and save some money by not having to get new pistons.
This brings us to my current dilemma, while "opening up the heads a little" I ground through the wall into the push rod tube area. I did some research and this is what I came up with for a fix..........
This pic shows the small .25" hole, I put a coat of JB Weld on it and sanded it back down flush.
I had read in another forum that a piece from a tape measure cut to size would follow the radius. This is a pick of the tape with the plastic yellow ground off the end while I was test fitting.
This is the fitted piece, a real good fit.
This is with a coating of JB on it. My thinking here is if it were to fail in any way it could not fit through the hole and hurt anything. I have built up the inside of the runner too a little and will refinish that also. The pics were taken while this was still wet.
Here is a pic of an intake runner
Bowl blend and a little unshrouding of the valves
I got a set of Stainless step headers last week, 1 3/4" to 1 7/8", I plan to use the valve covers too. These are temporarily on another LT1 motor I have. I still have yet to open up the intake for my 52mm TB.
I would appreciate any comments on this, Pro's or Con's. Does anyone think this will fail? I don't think heat will be a factor as JB is good up to 600* and not under pressure from a coolant passage.
This brings us to my current dilemma, while "opening up the heads a little" I ground through the wall into the push rod tube area. I did some research and this is what I came up with for a fix..........
This pic shows the small .25" hole, I put a coat of JB Weld on it and sanded it back down flush.
I had read in another forum that a piece from a tape measure cut to size would follow the radius. This is a pick of the tape with the plastic yellow ground off the end while I was test fitting.
This is the fitted piece, a real good fit.
This is with a coating of JB on it. My thinking here is if it were to fail in any way it could not fit through the hole and hurt anything. I have built up the inside of the runner too a little and will refinish that also. The pics were taken while this was still wet.
Here is a pic of an intake runner
Bowl blend and a little unshrouding of the valves
I got a set of Stainless step headers last week, 1 3/4" to 1 7/8", I plan to use the valve covers too. These are temporarily on another LT1 motor I have. I still have yet to open up the intake for my 52mm TB.
I would appreciate any comments on this, Pro's or Con's. Does anyone think this will fail? I don't think heat will be a factor as JB is good up to 600* and not under pressure from a coolant passage.
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