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Old 08-15-2010, 07:32 AM
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Dropped 5/16" SS Washer in Intake Manifold

Before I go to all the trouble of pulling the head off my small block chevy, I was wondering ... I have a 350 GM Performance crate motor that I put in my street rod project. The motor is brand new, never been cranked. The intake manifold is an Offenhauser 4X2 set up with (4) 2bbl Rochester carbs. In the process of installing the carb spacers & carbs, I dropped a brand new 5/16" stainless steel washer in the left front intake opening. Originally, I could see the washer lodged behind the intake valve for the #3 cylinder. I tried to pull it out with a telescoping magnet, but in the process, the washer fell out of sight. I've tried blanking off the intake & using a shop vac to suck it out - also tried blowing air through the #3 cylinder spark plug hole while using the shop vac ... no luck. Have tried every retrieving tool the auto parts stores/Harbor Freight sells, etc., but my problem is, I don't even know where the washer is? A friend suggested I find someone with a borescope. If I knew where the washer is, I might have a better chance of getting it out is his thinking. None of my local tool rental places have these and my fellow gearheads, while they know what I'm talking about, have know idea where to find one. Summit Racing sells "Provision" Fiberscopes and I've researched many other brands as well. I'm wondering if anyone here on the board has any experience with borescopes and if so, what one to buy? Also, any other ideas would be welcomed, before I have to disassemble a brand new motor? If spending $200-$300 on a borescope helps retrieve the washer, it's worth it. Thanks in advance for all your help & suggestions.

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Old 08-15-2010, 08:21 AM
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If it is stainless a magnet will not help. Pull the head and retrieve the washer-
lot's cheaper than $300. Jim
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Old 08-15-2010, 08:42 AM
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You will probably find it w/just the intake removed.
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Old 08-15-2010, 08:54 AM
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Go ahead and pull the intake and you will probably find it if the valve isn't open. Was the valve open or closed? If you can't find a scope your better off pulling it apart. New gaskets cost a lot less the $300. In regards to finding a scope kind of thing, i was at home depot yesterday and i saw this scope with an lcd screen for $130. I think ryobi makes it but im not 100% sure. It was green and silver though.
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Old 08-15-2010, 10:21 AM
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This is at least the third one of these scenarios over the past few months, and it really sickens me to read these..

A big ouch to the person experiencing this ................. Holes just have that natural gravity force working for it that sucks stuff into em..

BUT, here we go, if the air cleaner is off a rag goes in the carb, if the carb is off stuff the manifold with a rag .....

Not ragging (pun excused) on anyone just putting out a suggestion or reminder could save someone , I know this is elementary stuff .
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Old 08-15-2010, 11:05 AM
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Pull the manifold first,if you cant find it there ,pull the head or heads.
No way a 5/16 ss washer will come ou through plug hole.
If you were close to me id loan you a bore scope, I have 2 ridgid (not the brand) scopes, 1 is a 6mm Lennox, the other one 8 mm lennox,each of these are over $2000.00, my flexible scope is marketed by Snap On but made by Surgiscope,it cost $1800.00.
You are not going to find a scope you can see worth a crap with at Home D or Harbr Fr.
I have pulled stuff out of big diesels people have dropped,and i pull induction manifold and injector ,then look trough injector hole and use mech fingers trough an unseated intake valvebut the valves are abou 4 inches.
I have done this before in my own motors, only way not to make any mistakes is not to do anything, pull the heads.
ps. sorry lenox is spelled with only 1 n
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Old 08-15-2010, 11:16 PM
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Don't know if it's worth a crap but, it's cheap. May not fit through a plug hole.
Bore Scope.
http://www.harborfreight.com/wireles...tor-66550.html
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Old 08-16-2010, 06:47 AM
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Shake it by the heels !

How hard would it be to pull the engine, put it on a stand and turn it upside down and roll it across rough concrete or my brick patio ?
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Old 08-16-2010, 06:56 AM
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Quote:
Originally Posted by beam6325
Before I go to all the trouble of pulling the head off my small block chevy, I was wondering ... I have a 350 GM Performance crate motor that I put in my street rod project. The motor is brand new, never been cranked. The intake manifold is an Offenhauser 4X2 set up with (4) 2bbl Rochester carbs. In the process of installing the carb spacers & carbs, I dropped a brand new 5/16" stainless steel washer in the left front intake opening. Originally, I could see the washer lodged behind the intake valve for the #3 cylinder. I tried to pull it out with a telescoping magnet, but in the process, the washer fell out of sight. I've tried blanking off the intake & using a shop vac to suck it out - also tried blowing air through the #3 cylinder spark plug hole while using the shop vac ... no luck. Have tried every retrieving tool the auto parts stores/Harbor Freight sells, etc., but my problem is, I don't even know where the washer is? A friend suggested I find someone with a borescope. If I knew where the washer is, I might have a better chance of getting it out is his thinking. None of my local tool rental places have these and my fellow gearheads, while they know what I'm talking about, have know idea where to find one. Summit Racing sells "Provision" Fiberscopes and I've researched many other brands as well. I'm wondering if anyone here on the board has any experience with borescopes and if so, what one to buy? Also, any other ideas would be welcomed, before I have to disassemble a brand new motor? If spending $200-$300 on a borescope helps retrieve the washer, it's worth it. Thanks in advance for all your help & suggestions.
If the valve is closed you will only need to pull the intake and you should be able to retrieve it.
Pulling the intake is quick and you will need to do it no matter what so you might as well bite the bullet and pull it off. If the valve was closed the washer should be right there once you get the intake off.
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Old 08-16-2010, 09:09 AM
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Excellent opportunity to change some parts or try to do some port work. Make the most of a situation
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Old 08-17-2010, 09:34 AM
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Man, I know what you're going through. A month or so ago I posted about a rocker arm nut I lost and it made me f'n crazy.. I went ahead and started the motor, got lucky and it wasn;t in there and then about 2 weeks ago I found it lodged in the lower coil spring perch....

Definitely pull the intake, you should be able to find it unless the valve is open. If it's open and it fell in there you really have no other choice than to pull the head.. Even if you have to pull the head, you should have it off in a couple hours easily.
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Old 08-17-2010, 10:15 AM
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I did the same thing

I did the same thing. I dropped a stainless steel carburator nut lock washer into the thorttle bore of a Pontiac tri-power intake manifold. I did not know which throttle bore it went into so I flipped a coin and pulled the left head and there it was, sitting on top of #5 intake valve.

I learned two very valuable lessons:

1.) NEVER USE STAINLESS STEEL NUTS AND LOCK WASHERS ON YOUR CARBURATOR STUDS. If I again accidentally drop one of those into a intake manifold i could not retrieve it with a telescoping magnetic retrieval tool.

2.) If I drop a regular steel nut or lock washer into a throttle bore, I could at least retrieve it with a telescoping magnetic retrieval tool. Then it would not be necessary to remove one or both heads.
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