SoCal Jet Boats
Tech Talk => Engine Mechanical / Electrical => Topic started by: enginedoctor on April 15, 2008, 06:02:17 PM
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Basic Cylinder Head Service:
{Hopefully you have seen "Engine Building Tips #1 thru #4... so we will skip cleaning/inspection}
1. build the heads according to your cam spec. card as rec'd, and engine combination.
2. install new valve guides to assure concentricity and long life, must be done for seat work.
{ I prefer bronze guide liners )
3. Grind valves and seats to establish correct contact point/flow and tip lenth.
4. Check decks for straightness, mill/equalize as needed for equal "C.C.s".
5. Check clearances for valve train.
6. I prefer to lap valve/seat prior to assembly of heads.... ( it assures a better seal )
7. Pre-lube cylinder head assy and vac.test chambers after final cyl. head assy.
This procedure has worked well for me and I've done this work my whole life.
Above and beyond your basic stuff.... you have : porting/polishing ,dusting chambers,
bowl blending/undercutting/ int./ex.
work....and much more!
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do you have a flow bench
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No I don't... I have an associate that takes care of flow bench work.
Rather than that type of in-house work; I chose to get into Lathe / Millwork !
Back in the "70's" I was a CNC operator fabricating "Missiles", and I have my father
taking care of the mill/lathe manufacturing end of the bus. He has well over "60" yrs.exp.!
And I have my hands full with the engine end of the bus. , as I do all of the work from start
to finish. This way we can make / fix most any parts..... shafts/threads/gears,etc.
We have many machine shops that cannot perform this type of work and rely on our exp.
for tooling/manufacturing/prototype work and so on.
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Back in the "70's" I was a CNC operator fabricating "Missiles",
CNC back in the 70's huh? Hmmmm..... ??? :sly: :-\
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Yes! Late "70's" !! It was called a " G-32, made by Given".
It was huge. Tartan ind. in L.A. used them for manufacturing of missiles.
look into it . :) :)
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Yes! Late "70's" !! It was called a " G-32, made by Given".
It was huge. Tartan ind. in L.A. used them for manufacturing of missiles.
look into it . :) :)
I was just wondering because the bast I could come up with was NC controlled and it was wing building. I think IBM was the first actual C (computer) NC machine and it also was used for wing making. I'm thinking it was used mainly for cutting out metal parts. I'll bet that computer was bigger than a city block building 3 stories tall. ;D The refrigeration unit must have been massive as well.
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Yes ! This machine from end to end was probably 100ft long.
the chip conveyor alone was twice that.. I ran this thing to
turn exit cones ,(exaust).... The buttons on the control panel
were about the size of a silver dollar! and of course, multi-turret. :)
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oops.... G-32 was " P/NC.---Programmable numerical control..! Big diff. Huh? ;D