C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

What replacement engine can I use?

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Old Feb 25, 2015 | 05:30 PM
  #21  
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Thing is, you have to use the vette oil pan. Others will bolt on but the vettes don't hang down so far..use the vette oil pump pick up as well. The only other diff. that isn't mentioned is the water pump. Chevy made "long" and" short" water pumps. I only mention this because if you get something out of a junk yard, it may have the wrong water pump mounted. They all work, but lining up with the accsys, is the problem.
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Old Feb 26, 2015 | 10:25 AM
  #22  
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The goodwrench crate motor for the money is hard to beat its all new. Not rebuilt or hacked together by a min wage worker.
Have 0 faith in rebuilders race shops most of them esp if they offer up big claims for cheap. At least with the goodwrench theres some sort of warranty or QC.
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Old Feb 26, 2015 | 01:44 PM
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Originally Posted by ghoastrider1
Thing is, you have to use the vette oil pan. Others will bolt on but the vettes don't hang down so far..use the vette oil pump pick up as well. The only other diff. that isn't mentioned is the water pump. Chevy made "long" and" short" water pumps. I only mention this because if you get something out of a junk yard, it may have the wrong water pump mounted. They all work, but lining up with the accsys, is the problem.
With the water pump you will need a Corvette water pump for the L98/L83 Corvette motor. It will work with the accessory drive, rotate in the correct direction and have the bolt holes for the smog/air pump stuff.

Last edited by 1984Z51auto; Feb 26, 2015 at 01:45 PM. Reason: can't spell!
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Old Feb 26, 2015 | 10:36 PM
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Appreciate the replies, specially about the oil pan and pickup....
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Old Feb 28, 2015 | 01:40 PM
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I might have gotten of easy, Pulled the intake off today and low and behold I found a bolt in the #8 cyl next to the valve..... I knew it sounded like something bouncing around in there and not a rod bearing.....

well off to do a comp test and see what that looks like....

On a side note....

He lived Long and Prospered...RIP Mr Spock..... Many of us lost a lifelong friend.....
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Old Feb 28, 2015 | 02:02 PM
  #26  
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Originally Posted by Teqsand
I might have gotten of easy, Pulled the intake off today and low and behold I found a bolt in the #8 cyl next to the valve..
Not in the cylinder but in the intake port FOR the number eight cylinder ?

What size is it and where do you speculate that little bugger might have come from ?
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Old Feb 28, 2015 | 02:07 PM
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Looks like a runner bolt, is it a torx head?
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Old Feb 28, 2015 | 02:09 PM
  #28  
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Originally Posted by mtwoolford
Not in the cylinder but in the intake port FOR the number eight cylinder ?

What size is it and where do you speculate that little bugger might have come from ?
In the port before the valve.... it was actually standing upright in the port at the time I found it.....

Look like an intake plenum bolt (torx head).... no telling how long it had been in the intake system... PO said it just started making noise and didn;t want to deal with it so he sold the car, I bought it knowing I had to deal with it...but the price I got the car for, if this is the actual issue and not a lower end problem, I SCORED HUGE!
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Old Feb 28, 2015 | 03:31 PM
  #29  
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Wow! Next I'd drain and check your oil for metal just to make sure.
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Old Feb 28, 2015 | 04:07 PM
  #30  
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if you did not do it already shine a light down in the port and look for any damage to the valve.
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Old Feb 28, 2015 | 04:19 PM
  #31  
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No damage in the runner that I can see..... doesn't look like bolt got wedged in anwhere just kicked around....

checked compression, 150lbs on all cyl's except #8 which was 140 and I wonder if I got the hose to seal well enough....10lbs is within tolerance I think....

next step find some quality top end gaskets and put it back together and see what happens....
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Old Mar 1, 2015 | 11:26 AM
  #32  
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Originally Posted by Teqsand
checked compression, 150lbs on all cyl's except #8 which was 140 and I wonder if I got the hose to seal well enough....10lbs is within tolerance I think....
You are right. That is well under 10% variation between cylinders, so that is totally fine. Sounds like you may have scored.
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Old Mar 1, 2015 | 03:15 PM
  #33  
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Looking over my RPO codes, I found some cool stuff

Many other codes, but these it was bought as a performance duty car....

B3W-Advance price sheet
B9K-Cloth trim, Processing option
E5Z-Delete speedometer adaptor
E9Z-Delete speedometer key
FE7-High performance suspension
FG3-Preloaded gas shock absorbers
G44-Rear axle 3.07 ratio
K09-120 amp generator
KC4-Engine oil cooler
MM4-4 speed manual transmission
UL5-Radio delete
V08-Heavy duty cooling
Z51-Performance handling package

I found 3 places that list UL5 radio delete as only being on 172 cars made....

I have to wonder, how many of the 172 were white, with 4 spd and Z51 pkg.... might be the only one, that would be cool...

my 01 Z06 according to the museum was a 1 of 2, being millenium Yellow with the torch red seat option... and it was a damn ugly combo....

Anyway, waiting to put the intake system in the parts washer and rebuild the injectors....
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Old Mar 1, 2015 | 04:54 PM
  #34  
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Originally Posted by Teqsand
if this is the actual issue and not a lower end problem, I SCORED HUGE!
Congrats; good for you, most of my car buying involves I GOT SCREWED HUGE
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