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Hi again,
I agree with you wholeheartedly about your post.
I have torn into the three pin IACs to see the grooves. I kinda figured out that since it uses current to move the vane in each direction there was more wear on the commutator and even more at one end where the vane operated the most back and forth. I could see that the groove even began to taper to which I think helped it start start sticking at the end of its life cycle.
I agree that a spring returning the rotor back without using power must reduce arcing under the carbon brushes.
Even though it may take a tiny bit more current to move the rotor under spring tension some stabilization occurs against that force.
It just not there twitching 😵💫 with every vibration OR air pulsation.
I figure they had their reasoning to rubber mount it and the AMM too on the 240s.
I don’t know anything about the post models you speak of.
I don’t think I have ever seen a B234. That was an all aluminum 6 cylinder right?
In those years GM and GERMANY experimented with a high silicon content aluminum for engine block.
The Vega’s engine was made in Germany but I cannot say if it was only a block or the whole engine in 1972.
The pistons ran against the block without liners.
Rumors had it that the cost to GM for them was only about $99 ea.
you have to Remember it’s 1972 and they only spent NINE million dollars to put that whole car into production. That was unheard of and possibly a record.
It went into production about as fast as it went out too! Even though I’m sure there have been other to do that. Some models of every manufacturer have made their bombs at one time or another.
My brother-in-law had one that he let go into repossession.
No lemon law back then. It really hurt his credit ratings for years!
In fact I would almost say that car model caused the “lemon law” to slide into motion!
American manufacturers were killing consumers back then and selling some junk!
I learned this my own way as well but I could fix things ever since.
In 1974 Briggs & Stratton lawnmowers didn’t use liners either
You had to pay more to get cast iron liners with a marketing decal.
If you look into their cost today, to make a walk behind lawnmower for our hardware stores, outside of California of course, an inexpensive mower is like $400 I figure the complete engine has to cost only about $150 to make with that kind of ceiling in retail.
The deck and handle hopefully sell the accessory features.
Oh by the way B&S left Milwaukee, Wisconsin in the nineties I think. Milwaukee was not happy about losing those jobs!
This ideal or technology was about that era of Time that castings molds were made of styrofoam versus wood and were left in the sand casting box.
In jewelry it’s called the lost “wax” method. You just remold another styrofoam piece very quickly.
If you look closely onto later engine blocks outer surfaces you could see the flatten tiny bubbles too prove it. I like recognize them some thirty years ago on Saturns.
I assume since, they had to abandon R12 in blowing styrofoam molding, so, the bubbles may not be so pronounced as they were. Of course they may have move on from even method.
I’m not a new car enthusiast enough to go poking my head under hoods with those plastic engine covers either.
Their there to hide other sins from the buyers of FWD or exotic cars for that matter. IMHO
Was that B234 a Scottish or was it Swedish motor?
They were put into the DeLorean stainless steel gull wing car? Long before Telsa’s.
Those motors really sucked from what I have read.
Oil leaks or head problems.
How well did yours hold up?
Yes the K jets required finesse that is still needed on the LH.
You have to figure out what they are using to get the same results.
So yes, it’s about tuning in, while tuning up!
Have a great day!
Phil
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