Re: [OMC-Boats] Crankshaft area now?

Over the years of being a motorcycle tech, I've seen engines go in
some strange ways. And found stuff in them that has no conceivable way
of getting there. Don't scratch your head over it too much. ;-)

On Thu, Sep 10, 2009 at 2:09 AM, jd <jdood@...> wrote:
> yeah, just so happens that in all this taking apart process, although i
> saw nothing in the cylinders themselves, a little 1/8" size of lead
> solder dropped out of the IM. Then tonight a slightly bigger roundish bead
> of metal fell from somewhere onto the workbench as I was cleaning a head.
> So either one or both of those may have been a culprit. And again,
> saw nicks in cylinder's 1 and 6. Although, not sure how a little chunk
> of metal could get in a cylinder, bounce around and nick stuff up, then
> somehow GET BACK OUT again and up into the coolant or exhaust cavities.
> It would have to go backwards up into a valve which just doesn't seem
> likely. But an experienced machine shop guy i spoke with today was
> telling a story of some engine he had where the wing nut from the air
> cleaner cover dropped down the carb and migrated around from cylinder to
> cylinder. can't see how that's possible.
>
>
>
> On Sep 9, 2009, at 6:21 PM, Andy Perakes wrote:
>
>> If you haven't done so already, be sure to closely inspect your
>> valves/body. If anything was in there, it had to come in and go out of the
>> valves which means one or more of the valves/seats could be damaged else the
>> debris could still be trapped in a valve or spring. Look very close! Good
>> luck!
>>
>> Andy
>> '67 Reveler
>>
>> ----- Original Message -----
>> From: jd
>> To: Evinrude & Johnson Boats of the 1960's and 70's
>> Sent: Wednesday, September 09, 2009 7:23 PM
>> Subject: Re: [OMC-Boats] Crankshaft area now?
>>
>> Yep pulled both heads. Ok I'm going with option 3:
>>
>> Install new gaskets, put everything back together, test for noise. If
>> noise is still there i'll pull out the engine and check the crankshaft area
>> and probably call it a season. Nice part is I shouldn't need to mess with
>> replaced gaskets again and should be able pull out engine w/heads valve
>> covers and manifold installed? Right? Otherwise it's gonna mean another
>> $75 for new gaskets.
>>
>> In the meantime, I've dremel brushed clean the tops of all 6 pistons.
>> Definite dings and nicks on piston 1. Also on piston6 but way less. So
>> something was in there at some point and unless I'm blind it's gone now.
>> So in theory, problem possibley solved. Hopefully can get back together
>> and to ramp for test tonight.
>>
>> On Sep 9, 2009, at 2:37 PM, BLDFW <bldfw@...> wrote:
>>
>>> Did you pull both heads? Can't be too sure where a noise might be coming
>>> from.
>>>
>>> In anycase, yes, if you drop the oil pan you will be able to see
>>> everything you need to see to determine where the noise is coming from.
>>> Could be a bolt droppedout and is rattleing around, etc. Could be a bad
>>> bearing that is allowing crankshaft movement. I had that happen on an '86
>>> station wagon I bought at auction. Sounded pretty bad when it warmed up.
>>> Ended up swapping out the engine.
>>>
>>> I'm looking forward to the results.
>>>
>>> -Bill
>>> Dallas, TX
>>> 1970 Evinrude Explorer - 155 Buick V6 - OMC Sterndrive
>>> http://www.photobucket.com/evinrude_explorer
>>>
>>>
>>>
>>>
>>>
>>> --- On Wed, 9/9/09, jd <jdood@...> wrote:
>>>
>>> From: jd <jdood@...>
>>> Subject: [OMC-Boats] Crankshaft area now?
>>> To: "Evinrude the 1960's and 70's & Johnson Boats of"
>>> <omc-boats@...>
>>> Date: Wednesday, September 9, 2009, 4:07 PM
>>>
>>> I found what making the engine rattling noise - it was just a penny that
>>> some had left in the cylinder by accident (see photo)!!
>>>
>>>
>>> Ok just kidding. Nope didn't find anything in the port side - the side
>>> that's making the noise. Grrrrrr.
>>>
>>> So looking at the exploded diagram, it looks like the only other "void"
>>> left to check is down with the crankshaft stuff.
>>> But seriously, if one of those bolts down there worked loose, I wouldn't
>>> even be able to start the engine would I? And/or wouldn't it just fall down
>>> into the bottom of the oil pan?
>>>
>>> If I pull the engine out and take off the oil pan, am I gonna be able to
>>> see all the crankshaft guts? Thanks!
>>>
>>>
>>>
>>>
>>> Sent from outer space
>>>
>>> -----Inline Attachment Follows-----
>>>
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>>
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Received on Thursday, 10 September 2009