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84 K20 "Ethel" Not an Sbc/NV4500/241C

Semi restoration of a 1984 K20 pickup. 5.3 LS, nv4500, np241c.
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Well dammit, popped the cover off the 4500, everything looks great, only problem I found was the input shaft has some play but the output doesn't and I read there is a thrust bearing inside that I can replace. I have to replace the seal on the bearing retainer anyway. Annnd while working on getting the top cover reinstalled I stood up to rest my back and fell down again. Somehow I ended up under the truck and tried to sit up when I came to bashing my head against the fuel tank, I'm fine but sore as hell. I shoulda known better because it's pretty much identical as the last time I has this happen. Squatted down for a long time and stood up to fast.. now I get to go on many see appts because the wife wants to make sure my hearts not bad.
 
sreidmx said:
Well dammit, popped the cover off the 4500, everything looks great, only problem I found was the input shaft has some play but the output doesn't and I read there is a thrust bearing inside that I can replace. I have to replace the seal on the bearing retainer anyway. Annnd while working on getting the top cover reinstalled I stood up to rest my back and fell down again. Somehow I ended up under the truck and tried to sit up when I came to bashing my head against the fuel tank, I'm fine but sore as hell. I shoulda known better because it's pretty much identical as the last time I has this happen. Squatted down for a long time and stood up to fast.. now I get to go on many see appts because the wife wants to make sure my hearts not bad.
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Dude, that's scary stuff. I with her though, you have to find out what is happening
 
So amongst my accident I had some time to sit around and think about the other things I need to do, headgaskets. Now based on some research I find mixed reviews of folks running the 6.5 gasket on the 6.2 because of the extra coolant passages in the gaskets.
Is there any reason not to run a std 6.2 gasket? I plan on studs and was kind of considering just putting those in with the current gaskets but not sure if it's a great idea?? I have to remove the intake manifold to do the turbo swap anyway. From what I can tell I would be injector lines, and valve covers away from the head gasket?? Unless I am forgetting something? I know the GP and ex manifolds have to come off too. I figure do this all now while it's not super hot.
 
superbuickguy said:
what hp level?
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It would have to be around 250 at the most, I'd be running 15psi at most. I know it's gonna be better than 6.5s with a gm8 turbo running that same psi and will be stressed less with the more efficient turbo. I'll intercool it after I get beyond 10psi, to start with I'll see what 5psi does and creep up on it from there.
 
I'm not sure how many miles this motor has.. in my situation I'd like to check its internals anyway just to be sure I am not wasting money.
 
if it's not blowing oil-smoke when you apply the beans (blue smoke) and it doesn't quickly overheat (head gasket starting to leak).... then it has sufficient miles and will go lots longer. I know that sounds indefinite, but something kind of funny about turbo motors - a broken in one tends to last longer then a new one. It takes miles to really get everything seated, so 50k or 150k can actually be beneficial over a brand-new motor. With a new motor, it's the 5k return. Car goes for 5k miles, comes back smoking and broken because they just couldn't keep their foot out of it...
 
Oh trust me I feel the same way about this but because it sat 13 years and my track record when it comes to gaskets failing is the main reason. Mainly it just sitting really.
The oil pan is also dented bad from the bottom so I'd like to fix that as well and reseal the motor. At least this way if something does happen I have had my hands on it and know where to look. I am potentially creating a problem because there is going to be a lot of new stuff, trans, turbo, intake, lift pump, ac, etc... so I appreciate that known good part before I do all this other work, and have to redo it again later.
 
I would say a good quality gasket and ARP studs. My '83 C1500 I bought from Can Can in '07 had blown head gaskets when I got it. Paul was suspicious of the head gaskets when I bought it. By the time I got it home there was no doubt. Anyways, on dis-assembly I found several of the TTY head bolts loose, on a motor that had never been apart. My only guess is they were torqued right at their very limit and slightly beyond...I don't know how else TTY bolts could end up loose?

I used ARP studs and stock head gaskets. Didn't have a problem with it after that and drove it another 6 years before parking it in 2013. I never turbo'd it though I wouldn't have hesitated if I had the cabbage for a turbo kit...
 
sreidmx said:
Well dammit, popped the cover off the 4500, everything looks great, only problem I found was the input shaft has some play but the output doesn't and I read there is a thrust bearing inside that I can replace. I have to replace the seal on the bearing retainer anyway. Annnd while working on getting the top cover reinstalled I stood up to rest my back and fell down again. Somehow I ended up under the truck and tried to sit up when I came to bashing my head against the fuel tank, I'm fine but sore as hell. I shoulda known better because it's pretty much identical as the last time I has this happen. Squatted down for a long time and stood up to fast.. now I get to go on many see appts because the wife wants to make sure my hearts not bad.
Click to expand...

I had that problem when I was really overweight. Doc said it was a vagal (sp) response. Basically the body thinks you are overstressing and shuts things down temporarily. Like a circuit breaker...

Squatting uses the largest muscle groups, your quadriceps and gluts. Sounds like they used what blood supply you had available, causing your circuit breaker to "trip".

Definitely see your doc...a.s.a.p.
 
maximum, and this is simply my opinion, on a used motor would be check the bearings, replace the oil pump, reseal the motor. I'd not disturb the heads or rings.... but again, it's my opinion and I get why you'd want to check further - it is summertime so the odds of this snowballing is much decreased ;)
 
Big Ray said:
I had that problem when I was really overweight. Doc said it was a vagal (sp) response. Basically the body thinks you are overstressing and shuts things down temporarily. Like a circuit breaker...

Squatting uses the largest muscle groups, your quadriceps and gluts. Sounds like they used what blood supply you had available, causing your circuit breaker to "trip".

Definitely see your doc...a.s.a.p.
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I'll definitely be asking him about this.. I'm right at 174 lbs and 6'4 just literally like in high school.
 
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