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Old 01-13-2016, 06:48 PM
seth25 seth25 is offline
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LT1 Head Replacement

Looking at a prostar with an lt1. Nice boat but head has a hairline crack due to improper winterization. What's availability of LT1 heads and how big of a headache is the job?

Thanks
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Old 01-13-2016, 07:19 PM
TX.X-30 fan TX.X-30 fan is offline
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Weld it??
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Old 01-13-2016, 08:20 PM
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Shaun R Shaun R is offline
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You can find a set on craigslist for 200bux if they cannot be fixed, but most likely they can be welded up. No difference in marine and auto LT1 heads.
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Old 01-14-2016, 10:12 PM
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Here's where I got my head for my TBI engine (cast iron)
Maybe he can help you with LT-1 heads

Johnson and Tipton Cylinder Heads
6320 Hwy 79
Gibson NC
800-925-5513

Make sure the block isn't cracked also.
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Old 01-21-2016, 06:35 PM
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Bruce-ActionWater Bruce-ActionWater is offline
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Odessa Cylinder Head in Florida has the aluminum head or they have a LT1 cast iron option
727-299-9058
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  #6  
Old 01-21-2016, 06:39 PM
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Quote:
Originally Posted by seth25 View Post
Looking at a prostar with an lt1. Nice boat but head has a hairline crack due to improper winterization. What's availability of LT1 heads and how big of a headache is the job?

Thanks
If you have never done it can be a pain... the wrenchin' isn't that big a deal.. it's the installation and proper valve setup that can take some time.. The clymer manual has some good step by step.

It can be an undertaking if you never did. Good news its all very easily accessible.
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Old 01-21-2016, 07:41 PM
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Shaun R Shaun R is offline
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Quote:
Originally Posted by mikeg205 View Post
If you have never done it can be a pain... the wrenchin' isn't that big a deal.. it's the installation and proper valve setup that can take some time.. The clymer manual has some good step by step.

It can be an undertaking if you never did. Good news its all very easily accessible.
Valve setup on an LT1 is easy as it's zero lash.
Run motor until lifters are primed then turn it off, spin unloaded push rod and tighten 14mm rocker arm bolt until you can no longer spin it by hand, give it another 1/4 to 3/4 turn, move on to the next. You can also do this with the motor running if you don't mind a little oil on you.
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Old 01-26-2016, 04:50 PM
seth25 seth25 is offline
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Update:

Head is actually ok. It's two horizontal hairline cracks in the block. Not leaking. No water in the oil. But the cracks are visible. About 2" long. Guy has been running it as is for 5 years. Checking oil to make sure it hasn't gone through.

A few questions:

Worst case block replacement. Do companies like Jasper sell a LT1 block?

Is there an acceptable repair without block replacement? (JB Weld not acceptable).

Thanks
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  #9  
Old 01-26-2016, 08:36 PM
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Shaun R Shaun R is offline
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You can probably get the block welded up and be fine, given that it's gone five years with a crack. That's most likely what I would do and just keep an eye on the oil for water. Blocks can be found on CL for 150 but then you will most likely need someone to do the work for you.
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  #10  
Old 02-01-2016, 03:00 AM
seth25 seth25 is offline
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Anyone have experience with block stitching?
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