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

OK Guys, need some serious help!!

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Old Apr 16, 2008 | 10:42 PM
  #381  
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Originally Posted by jsup
I am trying to think where I dropped a screw, I'm thinking the only thing it could be is a distributor cap screw.

I'll find out tomorrow.
I'm glad you figured it out finally but that sucks that it's costing you money.

I guess a magnet may have been able to fish this screw out through a plug hole but you would have likely taken it apart anyway to check for damage.
Almost 400 posts in this thread. Do you win a prize for that?

Al least you got to start your engine after your build. I never got to start mine.
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Old Apr 16, 2008 | 10:46 PM
  #382  
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Originally Posted by 87 rag
I'm glad you figured it out finally but that sucks that it's costing you money.

I guess a magnet may have been able to fish this screw out through a plug hole but you would have likely taken it apart anyway to check for damage.
Almost 400 posts in this thread. Do you win a prize for that?

Al least you got to start your engine after your build. I never got to start mine.
Since I didn't have time I decided to throw money at it....I would have come to the result, just not for weeks.....

It's warming up and I want the car on the road, not in the garage.
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Old Apr 16, 2008 | 11:49 PM
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Originally Posted by jsup
Since I didn't have time I decided to throw money at it....I would have come to the result, just not for weeks.....

It's warming up and I want the car on the road, not in the garage.
I don't blame you for a second. it has already dragged out for weeks.
this is what I was refering to when I said I didn't get to start mine.
http://forums.corvetteforum.com/show....php?t=1995473
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Old Apr 17, 2008 | 12:52 AM
  #384  
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Originally Posted by jsup
I am trying to think where I dropped a screw, I'm thinking the only thing it could be is a distributor cap screw.

I'll find out tomorrow.
Im thinking this too after what you told us.Them small screws are a bit hard to remove from the caps themselves as it is.If it IS a distributor screw,Im gonna be suprised since they dont come out of the caps that easily,from what I seen.But glad to hear they found the problem...looks like it wont cost ya a full bottom end rebuild again eh?

Keep us posted!
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Old Apr 17, 2008 | 07:36 AM
  #385  
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Originally Posted by 87 rag
I don't blame you for a second. it has already dragged out for weeks.
this is what I was refering to when I said I didn't get to start mine.
http://forums.corvetteforum.com/show....php?t=1995473
Holy crap!!! Glad you're ok, but man that's bad. A couple years ago I picked up a fluorescent drop light, for this reason. You were so close.

I decieded I'm to anxious to get it done, and anxious is when mistakes are made, like dropping a screw down the hole, or setting the car on fire. No point in working on the car while distracted.
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Old Apr 17, 2008 | 09:18 AM
  #386  
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Originally Posted by 85blkrose
did you have any misplaced bolts/washers/tools that you had to use diffrent ones to complete the reinstall? if not then how is it possible to have something metallic down inside one of the cylinders.
no mention of a missing screw till just now
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Old Apr 17, 2008 | 09:33 AM
  #387  
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Just got back from the shop.

It was..................................... ..............................


A DISTRIBUTOR CAP SCREW.

Now, I have to admit, I did see one fall when I took the cap off, but nowhere near the intake.

My only guess is that it fell into an injector hole? I have no idea. When it dropped I thought it disappeared into the depts of the wiring harness and never thought the angle which it fell would have come near the intake.

I thought it was more likely one of the nuts that I was using to stud the Super Ram as they were all over the place.

I can't believe it.

So, we're waiting on the new piston and rod, just going to change them to be safe.

I am loading pics as I type....soon to come.

I feel like Kramer in the ASSMAN episode:

"One in a million shot doc, one in a million"......
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Old Apr 17, 2008 | 09:43 AM
  #388  
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Here's the pics, I should be able to just have the head ground smooth based on the location and not have a problem:













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Old Apr 17, 2008 | 09:44 AM
  #389  
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There's my $1000 lesson......education is expensive.
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Old Apr 17, 2008 | 10:44 AM
  #390  
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I am pleased if you found the stethoscope suggestion useful. I also said I was sure it was external rather than internal. I was certainly wrong about that. The good news is that you have located the problem. Now you can progress from here.

RACE ON!!!
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Old Apr 17, 2008 | 12:14 PM
  #391  
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It's just a minor setback. You'll be driving that Vette before you know it.

It's real easy to drop something down the intake or injector hole. That's why as soon as I get my intake off I duct tape every hole.

I had a feeling you lost a screw or nut down an injector hole and mentioned that on page 2.

I've made some mistakes too, we all do.

Last edited by Kool88vette; Apr 17, 2008 at 12:35 PM.
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Old Apr 17, 2008 | 12:17 PM
  #392  
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Hmm, I was convinced it was in the valvetrain, interesting. How does the cylinder wall look? Rest appears easily fixeable.
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Old Apr 17, 2008 | 02:14 PM
  #393  
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Originally Posted by cuisinartvette
Hmm, I was convinced it was in the valvetrain, interesting. How does the cylinder wall look? Rest appears easily fixeable.
Haven't seen the cyl wall yet, howver, I'm not expecting anything major, or minor for that matter.
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Old Apr 17, 2008 | 02:15 PM
  #394  
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Originally Posted by CFI-EFI
I am pleased if you found the stethoscope suggestion useful. I also said I was sure it was external rather than internal. I was certainly wrong about that. The good news is that you have located the problem. Now you can progress from here.

RACE ON!!!
I'll have to agree with CFI. I was 100% certain it was external as well, and I was also wrong.

Though I'm curious how much cutting of the head you will do, and how it will effect compression on that side. Let us know.

The cylinder is fine?? wow.

-- Joe
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Old Apr 17, 2008 | 02:22 PM
  #395  
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Originally Posted by CFI-EFI
I am pleased if you found the stethoscope suggestion useful. I also said I was sure it was external rather than internal. I was certainly wrong about that. The good news is that you have located the problem. Now you can progress from here.

RACE ON!!!
Yep, it sure helped. Thanks.
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Old Apr 17, 2008 | 02:23 PM
  #396  
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Originally Posted by anesthes
I'll have to agree with CFI. I was 100% certain it was external as well, and I was also wrong.

Though I'm curious how much cutting of the head you will do, and how it will effect compression on that side. Let us know.

The cylinder is fine?? wow.

-- Joe
Since the screw landed in the edge the head, inside the gasket, I do not believe I will cut the head. HOWEVER, I am waiting for the machine shop to get back to me on that.
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Old Apr 17, 2008 | 02:43 PM
  #397  
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...I do not believe I will cut the head.
Doesn't look like it; wonder it the shop will just heli-arc some metal into that spot and then polish it out to contour??
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To OK Guys, need some serious help!!

Old Apr 17, 2008 | 08:05 PM
  #398  
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Should be an easy fix.
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Old Apr 17, 2008 | 08:56 PM
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Originally Posted by 65Z01
Doesn't look like it; wonder it the shop will just heli-arc some metal into that spot and then polish it out to contour??
Heh, My machine shop would tell me to buy another head

I think he's got some expensive brodix heads though.

-- Joe
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Old Apr 17, 2008 | 10:07 PM
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Ya know, looking at those pictures, I realize that the screw could not have landed in a better spot. Further toward the end, it would have destroyed the cyl wall, a little toward the middle could have trashed the valve. All in all, a pretty lucky hit where it was...
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