1970 s2 0453R Reassembly

[dakazman]

 Thanks Chuck and Gavin, 

  The guys in work keep me in the loop , taunting me because they know I love it so .
These pics show what we do to keep flying, it breaks up the monotony of daily checks and mundane tasks .
 

[BDA]

 D'man, I'm not sure but it doesn't look like any of those will fit in a Europa! 

[surfguitar58]

   
  My retirement package finally came out and as of Oct 1 , I’m officially retired after 43 years with Delta airlines.  A new milestone achieved.

Congrats D'man! A free man in the prime of life, what could be better?
Tom

[SilverBeast]

D'man, I'm not sure but it doesn't look like any of those will fit in a Europa! 

If you do shoehorn one of them in, I'd recommend a brake upgrade and bigger tanks! 

[dakazman]

  That's one of the smaller engines I hung,doing one thats Two stories up is a little more tricky. Some of the APU's (auxiliary power unit) wouldn't even fit but they could power up your whole blocks power usage and cook up some nice BBQ.
 
  Thanks again Guys , Ill post some pics of the retirement party that was put on hold due to Covid19.
 
Dave

[Bodzer]

Well Done D’man. Ya made it! As a pilot I am always appreciative of the engineers. “We bend’em you mend’em”! You can now hang up your stamp.

[dakazman]

Thanks Bodzer,
  Safety is job one, no doubt.  Sometimes I was called inspector and did my fair share of going to the mat . People hate us and love us at different times. I always went by the book.
 Sorry to have missed you on your last visit.
   Dave

[Bodzer]

There will be a next time! My family and I love Florida. Sadly it looks like my Aer (big hint!) line won’t be starting the Miami route again.  MCO is still going to happen though. I can say with a clear conscience that I have never put the engineers under pressure to get a job done although I’ve seen other captains do it.  That never ends well.

More time for the Europa and the grandkids.  I hope they’re all well.

[dakazman]

   I am also a pilot but gave it up after 9/11 when our local air park shutdown. We had a nice 2k runway. We also had a flight school that foreign students could get lots of flight time in for their certification.
  Babysitting is a real challenge! Especially during nap time , mine , not theirs...
 
  Dakazman
   

[dakazman]

  I ran across some differences on some 821 wedge heads. Being a novice I ran across two different keepers on the intake valves , on different wedge heads. Both had a single catch the valves were also longer. The springs longer and the obvious dual springs.  The valves themselves were also longer.
  All the exhaust valves were the same on 3 heads.

  Are these differences in the model or year Renault?

   I also came across this for a crossflow heads intake valve.

Dakazman

[BDA]

I suspect that there is some variation in valves from one manufacturer to another. This includes the length of the stem and the type of keepers. When I was doing a valve adjustment on my BDA (story coming soon!), I bought some valve shims from Dave Bean. What I got was not the flat shims my engine had but little caps that fit on the top of the valve stem. The caps were deeper than the distance between the top of the keeper and the top of the valve stem. I didn't feel comfortable trimming the "skirt" of the cap enough to fit on my valves so I didn't use them but this leads me to believe there are at least variations in designs for a particular engine and there may in fact be generic valves that you choose based on a few variables like material, the stem diameter, stem length, and valve diameter.

All this is a fair amount of guessing and supposition so I hope someone with better knowledge of this will speak up.

[jbcollier]

On engines where original parts were impossible to find, my machinist would adapt other valves and machine them to fit.  That includes machining for the keepers.

[dakazman]

   I see ,

  Which spring set should I use the stiffer dual or shorter single? I would assume as a safety feature having a dual spring would be beneficial.
   On the crossflow:
  I increased the size of the intake on the crossflow slightly 1mm . It will go to the machinist as soon as I locate some exhaust valves and keepers for them.
I was also able to locate a single 79 mm never used piston , so with a little honing to the sleeve and a set of rings the crossflow will start going together.

Dakazman

[BDA]

I was told many years ago that multiple springs are used because they have different resonant frequencies as well as to increase the tension on the valve. I would think that it would depend on the weight of your valve train and the expected rpms. I would think you want the dual spring setup.

[dakazman]

  Another about face !  My plans for installing a 821 wedge with the crankshaft of an 843 crossflow got sidelined by finding out the block needs a line bore on the block. My machinist sent me to another shop that can do that job. I also located another wedge head that is in good condition but with slight damage to one cylinder , milling the head slightly may clean up the damage.
  So back to assembling the crossflow which as you may remember had a frozen piston pin and melted rings on the piston.  I located a single piston, 😃 so I removed the 821 from the engine stand and as I was ready to mount the crossflow decided to remove the liners and further clean and inspect the block.
 Liners and block cleaned up nicely by I found why nbr 2 piston failed , the thrust bearings were set incorrectly causing the piston to rub against the aft side of the block . That explains why the that piston pin seized . 
  Now that the weather cooled down to 90 I’m back at it.
  BDA , my machinist wants to put the single spring on the head. He mentioned that since I woul only drive it at max 3k  there would be less stress on the cam. I held my ground and said to install the dual spring.  I can’t wait to get passed these engine builds but I’m insistent on adding the pulley for the A/C
System.
Dakazman