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Austinsevenfriends
Rosengart in Brittany - Printable Version

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RE: Rosengart in Brittany - Renaud - 29-09-2019

Thanks to all of you.
Yes I'll favour the aluminium head too obviously with the right spark plug position. I don't much care about the hardened or not seats though!

RE: Rosengart in Brittany - Ian McGowan - 29-09-2019

Hi Renaud, welcome back!
Re, those "tram lines" in the bore, I had the same in an A7 block, took it out to just over +0.083" and fitted Renault 4 pistons - cleared the scoring and (touch wood) after 12000 miles, no signs of bore break through. Zero oil consumption also.  Smile

RE: Rosengart in Brittany - Renaud - 29-09-2019

Hi Ian,
Welcome back too! Ha ha!
I'm thinking of simply ignoring those "tram lines" if they are not too deep... Renault pistons are quite rare here too!

RE: Rosengart in Brittany - Colin Reed - 29-09-2019

(29-09-2019, 05:34 PM)Renaud Wrote: Could you tell what you find srange here:

[Image: bloc_d11.jpg]
Hi Renaud,
Some blocks from other engine makers had the same, my belief is when the block is machined you don't touch the seats.
Colin
 NZ

RE: Rosengart in Brittany - Renaud - 30-09-2019

Thanks Colin.

RE: Rosengart in Brittany - Renaud - 30-09-2019

About the "Leboncoin" place, (https://www.leboncoin.fr/) you can find those two nice little cars now:
Rosengart cabriolet
Rosengart
When looking for cars better to search in "Véhicules > voitures"
or for parts: "Véhicules > équipement auto"
Good luck!
On the LR2 engine I measured the cranshaft bearings at 30 mm. And the big ends at 36 mm.
Any comment?

RE: Rosengart in Brittany - Renaud - 30-09-2019

Thanks to Derek's documentation I'm answering my previous question about big end diameter:
I just found that:

[Image: img_2014.jpg]

Seems that the 36 mm "portée" pertains to LR44 to LR4N2 engines.
(29-09-2019, 09:11 AM)Chris KC Wrote: I'd be interested to know what the holes on the top of the crankcase next to the starter housing are for.

Shame about the front crankcase mounts - but wonders can be done with aluminium welding these days. I'd look for a scrap A7 case which doesn't need its mounts any more. (I might even have one).

You probably saw that I answered your first question.
Would the scrap A7 case be an offer Chris? [Image: biggrin.png]

RE: Rosengart in Brittany - Chris KC - 30-09-2019

I did, thanks.

It would, but - desolé - I'm not sure it will do for you as I think it may be later type with rubber mounts. I can try to check tomorrow.

RE: Rosengart in Brittany - Renaud - 30-09-2019

Rubber mounts are better anyway. I can also machine those on my mill and have somebody solder them. I TIG weld but not ali!

RE: Rosengart in Brittany - Renaud - 01-10-2019

To be thorough I'll add those too:

[Image: dsc_2730.jpg][Image: dsc_2726.jpg][Image: dsc_2731.jpg][Image: 3biell10.jpg]:
[Image: dsc_2738.jpg]