Fw: [Diy_efi] Lumpy engine in closed loop cruise

[Mike]

My biggest concern was listening to a professional mechanic
some 20 years ago going on about the big ends and how they are
kept in touch with the block permanently, suffice it to say being
younger I got real confused, cause I thought the term 'big end'
meant the bottom of the rod - ie the biggest end of the rod. When I
pointed this out to him he got really angry and went off about
the big end crank bearings, he said something like "... you know
the big end of the crank bearings not the smaller middle ones..."

So for some 10 years before I had the chance to open an engine
myself I frequently mixed big ends with crank bearings and used
either as the sentence flowed regardless of the intention.

When I realised what had happened I came to the understanding
that contextual terminology is more important than slips that are
just basic linguistic issues because we are so focussed on the task
at hand that the description becomes rather secondary.

So when I say "side cam" I meant to say the cam is not in the head,
its in the block and there is only one of them. My olde 1600cc escort
was perhaps better known as overhead valve, since I guess if one
said that it would exclude overhead cam by convention. But afterall
who cares, it was a nice motor - not all that smooth as I took from
12 to 16 pounds off the flywheel (manual gearbox) so it revved up damn
fast to around 6000 no problems, ended up blowing a hole in edge
of piston as a screw fell off my large air intake and got swallowed,
managed to miss the valves alltogther but totally screwed the (soft)
piston...

cest la vi, bonswa

<chuckle>

Back to bearing matching on my VLT, so I'm going to change big
end bearings from two old motors into my current one without
regrinding my crank, or taking the block out of the car, its still
jacked up so it clears the cross member, doesnt look too bad, few cracks in the wood on the jack though <shrug> anyone care to guess how long that will last
or the crank and rods for that matter  ?

btw: I noticed one of the nuts holding the bearing shell on the big end
of cyl 1 was not nearly as tight as the others, interesting. I wonder if
the loose bearing had caused enough vibration to loosen the nut, the
thread looks fine and they are captive bolts anyways...mmmmm

Rgds

Mike



At 04:30 PM 10/23/05, you wrote:
>mikeee, imm reallyyyy sorrry to see someoneeee ffloundering so illl pass u some buzzzwordssss, overheaddd valveeee,, overheaaad cam, duall overhead cam, flathead, or if you go realll far back, t head or t valve,,,, butt not side cam,,,buck,,, to the moderatorr oftheis fine graoup,, if u let this one pass, i promiseee ill never be mean again,,,, thankss, ubck
>
>
>>From: "Mike" <niche at iinet.net.au>
>>Reply-To: diy_efi at diy-efi.org
>>To: diy_efi at diy-efi.org
>>Subject: Re: Fw: [Diy_efi] Lumpy engine in closed loop cruise
>>Date: Sun, 23 Oct 2005 15:59:27 +0800
>>
>>Yeah sorry meant to say side cam in block,
>>i'm answering my emails to fast with oil on my hands
>>after taking off the sump on my car, found the big
>>end bearing on cyl 1 to be scored and heat damaged
>>as if some starvation, going to take others out shortly,
>>twas interesting taking the sump off whilst leaving the block
>>jacked up on central point under tranny <sigh>
>>
>>rgds
>>
>>mike
>>
>>
>>At 12:27 PM 10/23/05, you wrote:
>>>In a message dated 23/10/2005 05:09:07 GMT Standard Time, niche at iinet.net.au writes:
>>>Nope, side valve with pushrods, completely flat head, bowl in pistons etc.
>>>Can post some pics if interested.
>>>
>>>Rgds
>>>
>>>Mike
>>>
>>>Sorry Mike,
>>>
>>>Can't resist joining in, this time he's on the money, your terminology is incorrect.  World wide the accepted meaning of "side valve" is:
>>>1.    Camshaft in block
>>>2.    Valves in block directly actuated by camshaft.
>>>
>>>No-one has built engines like that since the fifties except for e.g. retro drag motors, referred to as (oh yes) "flathead" or "flatties".  
>>Except perhaps the old Rover straight 6, with one overhead valve and one side valve ("F" head), replaced in the late 60's by the then "new" Olds/Buick 3.5 litre V8.
>>>
>>>An OHV engine has the valves in the head, actuated by pushrods from the camshaft in the block.  It is irrelevant whether the head has a combustion chamber (e.g. BMC "A" series, Ford "Kent" cross-flow) or is flat, with the chamber in the piston (e.g. Ford 3.0 V6 "Essex", 1965-76 approx).  What matters is the position of the valves.
>>>
>>>Give us dinosaurs a break, some of you guys out there are so knowledgeable about modern stuff you tend to lose sight of the basics!  :-)
>>>
>>>Will C
>>>_______________________________________________
>>>Diy_efi mailing list
>>>Diy_efi at diy-efi.org
>>>http://lists.diy-efi.org/mailman/listinfo/diy_efi
>>
>>
>>Regards from
>>
>>
>>Mike
>>Perth, Western Australia
>>VL Commodore Fuse Rail that wont warp or melt !
>>Twin tyres for most sedans, trikes and motorcycle sidecars
>>http://niche.iinet.net.au
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>>Diy_efi mailing list
>>Diy_efi at diy-efi.org
>>http://lists.diy-efi.org/mailman/listinfo/diy_efi
>
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Regards from


Mike
Perth, Western Australia
VL Commodore Fuse Rail that wont warp or melt !
Twin tyres for most sedans, trikes and motorcycle sidecars
http://niche.iinet.net.au