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deronmoped
Joined: 03 Nov 2006
Posts: 1154
Location: San Diego
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| Posted: Sun Jul 25, 2010 4:39 am Post subject: Cap problems and test. |
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So I had a problem with my video-out board. I noticed a few caps were leaking. In a experiment, instead of replacing them, I just cleaned up the mess. Well with the goo cleaned off the board, the problems went away. Apparently the goo affects the conductance or capacitance across the connections of the board itself.
Deron.
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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Electrogeek
Joined: 03 Aug 2007
Posts: 104
Location: Hamilton New Zealand
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| Posted: Sun Jul 25, 2010 12:20 pm Post subject: |
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That gue you wiped off forms part f the electrolyte that holds the charge in the cap, without that there chances are that the cap is not storing even remotely enough charge to do its job right, you really should replace them (also, once burst they can catch fire....)
_________________
I have found a use for compact fluorescents hehe
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Sun Jul 25, 2010 4:35 pm Post subject: |
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the other day day our mini-van threw a connecting rod out through the oil pan. I cleaned up all the spilled oil and Other than a slight knocking sound it seems to run fine. Going for a road trip tomorrow 
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Sun Jul 25, 2010 4:38 pm Post subject: |
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That leaking cap goop also eats away the traces. Had an NEC switcher and an NEC deflection board give me nothing but grief due to a tiny eaten away trace.
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deronmoped
Joined: 03 Nov 2006
Posts: 1154
Location: San Diego
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| Posted: Mon Jul 26, 2010 12:40 am Post subject: |
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| draganm wrote: | | the other day day our mini-van threw a connecting rod out through the oil pan. I cleaned up all the spilled oil and Other than a slight knocking sound it seems to run fine. Going for a road trip tomorrow |
I used to drive a old 1972 Chev C10 pickup truck. Five of us took it out on our usual desert trip, loaded down with four three wheelers, a motorcycle, a twenty seven foot trailer and all the beer you could drink and then some. Got it out to the desert and had brought all the stuff to do a oil change, that I had been planning to do for months. Took the oil drain plug off and nothing came out, well not for a few seconds anyways. Got about a quart of goo out of it.  Put another 80,000 miles on that engine before we sold the truck.
Deron.
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deronmoped
Joined: 03 Nov 2006
Posts: 1154
Location: San Diego
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| Posted: Mon Jul 26, 2010 12:43 am Post subject: |
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Yeah
I swapped out the video out board with one in better shape. The problem is, I'm not sure which cap or caps was leaking. When I have time, I will probably just change out all the ones in the general area. Now of course I could do the whole board, but who wants to replace a hundred caps.
Deron.
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Mon Jul 26, 2010 3:58 pm Post subject: |
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| deronmoped wrote: | I used to drive a old 1972 Chev C10 pickup truck. Five of us took it out on our usual desert trip, loaded down with four three wheelers, a motorcycle, a twenty seven foot trailer and all the beer you could drink and then some. Got it out to the desert and had brought all the stuff to do a oil change, that I had been planning to do for months. Took the oil drain plug off and nothing came out, well not for a few seconds anyways. Got about a quart of goo out of it. Put another 80,000 miles on that engine before we sold the truck.
Deron. |
sweet, those old engines had lots of clearance with the internal moving parts and while they weren't very efficient they took a lot of abuse. Sludge in the engine either comes from not changing the oil for 10K miles or sooner if you use Valvoline. Try that with an import these days and your gauranteed to need a new engine.
your caps o nthe other hand you should change 
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deronmoped
Joined: 03 Nov 2006
Posts: 1154
Location: San Diego
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| Posted: Tue Jul 27, 2010 4:16 am Post subject: |
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| draganm wrote: | | deronmoped wrote: | I used to drive a old 1972 Chev C10 pickup truck. Five of us took it out on our usual desert trip, loaded down with four three wheelers, a motorcycle, a twenty seven foot trailer and all the beer you could drink and then some. Got it out to the desert and had brought all the stuff to do a oil change, that I had been planning to do for months. Took the oil drain plug off and nothing came out, well not for a few seconds anyways. Got about a quart of goo out of it. Put another 80,000 miles on that engine before we sold the truck.
Deron. |
sweet, those old engines had lots of clearance with the internal moving parts and while they weren't very efficient they took a lot of abuse. Sludge in the engine either comes from not changing the oil for 10K miles or sooner if you use Valvoline. Try that with an import these days and your gauranteed to need a new engine.
your caps o nthe other hand you should change |
Yeah
There is nothing like good old American cast iron engines. That 350 took a hell of a lot of abuse from us three brothers growing up with that truck and thinking it was a race vehicle. Used to call it "Smoke and Thunder". One of my favorite things to do was turn the key off and coast a ways in gear going down a steep hill, turn it back on and "BOOM"! Must have blow out a half dozen mufflers.
I got a 1976 RV with a Chrysler 440 in it. I tried a whole bunch of times to destroy that engine. Must of overheated it a dozen times before I figured out the radiator was almost completely clogged. Replaced the radiator and it's still going strong.
Come even close to overheating a modern engine and it's toast. Seen plenty of those, cracked heads, blown head gaskets, warped heads...
Deron.
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