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    1997 5.7L thunderbolt ignition. Slow crank

    Oh so my intake manifold will NOT work? A I I've read it would just trying to get the right answer. The reason I was asking about the manifold is my manifold has round ports for the carburetor to bolt on to, the other ones for vortec look completely different, They look rectangularly which I...
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    1997 5.7L thunderbolt ignition. Slow crank

    Also. I have a 2BBL carb, will this manifold bolt onto a vortec? And will I have to run a different fuel pump or will the mechanical fuel pump work with it? Or have to contact them?
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    1997 5.7L thunderbolt ignition. Slow crank

    Okay I'm going to get an engine ordered this week, think I'd rather just order a reman rather than have mine rebuilt just think it'll take too long. do I need to buy a four bolt or is 2 ok? And will the camshaft need changed? Or head gasket...
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    1997 5.7L thunderbolt ignition. Slow crank

    No nothing obvious from my view, but I'll look closer when I get the engine out for sure
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    1997 5.7L thunderbolt ignition. Slow crank

    Yeah I've thought about that, but I decided to go ahead with a repower rather than buy a new boat for cost reasons, the boat is not worth that much money. So I don't want to put a lot of money into it. Upgrading to a vortec might be feasible and probably my easiest upgrade, because it would...
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    1997 5.7L thunderbolt ignition. Slow crank

    Update, blown head gasket
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    1997 5.7L thunderbolt ignition. Slow crank

    Oh I thought I read on here the exhaust manifold from a non vortec won't bolt onto a vortec head? Does the vortec add HP?
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    1997 5.7L thunderbolt ignition. Slow crank

    I'm not finding anything local with under 150k. There's some across the country I requested quotes on , under 100k miles, only a few that don't want more than reman Also been searching a bunch of rebuilders for a reman. Alot of them had poor reviews, but a company called "powertrain products"...
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    1997 5.7L thunderbolt ignition. Slow crank

    I was thinking about going that route, to upgrade to that I would just need to change the manifolds? I would just need to know what all I would need to purchase to make the vortec work, because the boat may not be worth putting all that money into
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    1997 5.7L thunderbolt ignition. Slow crank

    Yeah, oh well I thought my boating days were over because I thought this was going to be out of my capability. And a marina wouldn't cost too much for the value of the boat to have a new engine put in. But thanks to you guys I'm confident that I can get this back on the water maybe even this...
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    1997 5.7L thunderbolt ignition. Slow crank

    Cylinder 3
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    1997 5.7L thunderbolt ignition. Slow crank

    ..
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    1997 5.7L thunderbolt ignition. Slow crank

    Okay thx ! When I get it off I'll send you a picture, if it's catastrophic I guess it won't matter where the rods go I'll be putting a new engine in it lol
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    1997 5.7L thunderbolt ignition. Slow crank

    Okay, And these are all the head bolts, I think I counted nine of them? Also when you say loosen the rockers , I don't remove the bolt completely just loosen them? And when am I marking the push rod, what exactly do you mean by that? Also I was watching one guy take a head off, and it sounded...
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    1997 5.7L thunderbolt ignition. Slow crank

    Thanks. I don't have the manifolds off yet but I plan on having one of them off in the next hour. I'm cooling down now it's pretty hot the boat's in the middle of the Sun ☀️ . But once I get the starboard side manifold off taking the head off is where I'm entering new territory never done that...
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    1997 5.7L thunderbolt ignition. Slow crank

    Oh and when I crank it with the key and look at the engine with the covers off, I can see all of the valves moving they're not stuck. But it just doesn't move when I crank it by hand. Also the only reason I've been kind of optimistic about it not being internal damage is I find it hard to...
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    1997 5.7L thunderbolt ignition. Slow crank

    I mean I really don't want to replace the engine by any means, I'd rather not lol But yes I tried to turn it by hand on that 16 mm bolt on the harmonic balancer, it doesn't budge not even a little bit. And from my understanding I shouldn't have to turn it hard enough to the point where it will...
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    1997 5.7L thunderbolt ignition. Slow crank

    I don't, But I've moved on from thinking it's an electrical problem because I can't turn the engine by hand.
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    1997 5.7L thunderbolt ignition. Slow crank

    Okay thanks for corroborating, that was the only thing I was unsure of is if that voltage drop could be because the starter is drawing so much power against a seizing engine. I've been slowly getting it apart just kind of taking tips as I go lol
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    1997 5.7L thunderbolt ignition. Slow crank

    I do get a voltage drop when the starter cranks at the solenoid and at the starter. But I can't turn the engine by hand anyway that's why I'm leaning towards internal damage. And those cables were just fine the day before all this happened
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