412 video (Tyrrell’s classic workshop)

That's a very interesting video covering lots of ground.

 

I came here to post the video, you beat me to it.

Beautiful car, needs a bunch of sorting. The commentary is a bit 'all over the place'.

Regards,

Art S.

 

There was more emphasis on the FIAT 130 than the 412

Hopefully he does a follow up on this.

 

Way too much prattling on about the dumb Fiat!

 

Well, the Fiat is the original reason I noticed the 412, and I think that's what happened to him too. It was an amazing car to have come out of Fiat. Highly luxurious for its day.

 

SLAP! The Fiat is NOT dumb!!

 

He already did a video about the Fiat. He is standing by a 412 in the 412 video, but goes on and on and on about the Fiat. Cool car, but the 412 is what I clicked on the video for.

 

I'll just put this here.
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See? It's been done. We didn't need another one.

There is so little 412 content out there.

 

Part 2:

 

Much better than Part 1!

 

He did a little mistake when talking about the rear suspension. The Series 1 400i had the suspension that he speaks of, but the Series 2 400i and the 412 have the same rear suspension.

 

My guess is the “unspoken” remedy for the hot start problem was a failed accumulator.


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Yes, it's so "secret" that it's only printed in the F service manuals that cover K/KE-Jet models , but there are more possible causes for the residual fuel pressure falling too quickly at warm engine shutoff than just the Accumulator(s) failing.

 

Ha ha ha. OK! Great videos and very informative though.

The tricky thing about the accumulator (for cars not driven daily or weekly) is the car starts pretty easily when cold every time. ! The owner is encouraged therefore to hop in and go. Once the engine is warm or hot, a stop for ten minutes is “usually” not a problem when restarting. However, a stop for breakfast with significant other can be embarrassing. AND a stop long enough for engine to return to cold starts right up.

We shade tree mechanics (STM) begin to chase an intermittent problem …. We probably don’t have or even read the appropriate manual. Then we tweak something without asking YOU on FChat (big mistake) and we repeat the cycle all over again, including another breakfast. Bottom line I guess - perhaps the absolute first thing to check is to detach the accumulator completely, invert it, pour some fuel safely in one end. If fuel runs straight through or drips out the other end, the diaphragm has failed. My Mondial (?? Who let him in here??) has never not started immediately even when hot- since David Geary (Deer park, Wa.). sent a video of fuel running straight through - and he fitted a new accumulator.

Elusive. Maddening. Embarrassing.

Yes, I’m sure there are several other possible causes. Cheers, SG


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btw. I closely resemble the STM remark.


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+1 -- Always enjoy his videos, vocabulary, and often learn something. The 12 cyl cars are a little more "resistant" to this issue than the V8s as, if one bank has this problem, it will usually warm start on the other bank enough to get going (so needs to have a problem on both banks to be stranded).

True -- the Accumulator is the first place to start investigating for this issue, but it's the US cars where it can be "hidden" from view with the Accumulator vent line going back to the fuel tank. On the euro cars, with the vent just left open, it's more obvious and dangerous .

 

He mentions the accumulators being 28bar.
I've seen 23bar and 155bar mentioned as being used here on the forum, but do we know what's correct?

Cheers

Esben

 

Do we know who that is?

 

Sergio Pininfarina.

 

I've done some research, so I'll answer my own question

I think all of the Mercedes accumulators are rated at 23bar, it's just that the Corteco ones have the maximum permissible pressure of 155bar written on them... The original Konis have 160bar as maximum permissible pressure written on them, but that seems way too high as an actual working pressure.

Cheers

Esben

 

Does not make much difference and can be refiled as needed. So as long as you make it fit, no worries: you can have it tweaked afterward.

 

Same car out and about in Manchester today-looked great.
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