Update on my last posting. Andrew who works for Qantas has pointed this
out.
*Limbach hold the type design so are the manufacturer despite not
fabricating the part. They hold the design and perform the conformity check
before raising the Form 1.*
*If you go straight to the “manufacturer” say
G'day Blokes,
This posting relates to regulations in Australia but there may be some sort
of equivalent regulations in other countries.
Below is the section on parts replacement from the Australian CASR
https://www.legislation.gov.au/Details/F2011C00973/Html/Volume_1#_Toc311721051
Interesting
My understanding if you have a prop stroke then the bulk strip can be done
by a LAME organisation (that is qualified) or aviation engine rebuilder.
There are still some Aviation engine re builders around that are good on VWs
A friend 2 or 3 years ago convinced himself the engine had an issue
Thanks Tom!
A limbach is a very expensive rebranded VW motor. Example... I recently
dismantled a L2400 which is based on the Type 25 VW. The main and cam
bearings were just "off the shelf" Kolbenschmidt. Limbach is charging you
about 300 euros extra to change the boxes they come in.
If you can
Afterthought... I consider you Rob, given your lengthy experience and depth
of thought, to be a grandmaster of these motors. You too Ian.
On Fri, Mar 19, 2021, 07:51 Tom Preisser wrote:
> Not yet... They offered a one week "maintenance" course previously
> that, if I understood correctly,
Yep
Ian W
From: dog@lists.riverland.net.au On Behalf Of Rob Thompson
Sent: Friday, 19 March 2021 7:51 p.m.
To: dog@lists.riverland.net.au
Subject: [DOG mailing list] Limbach engine rebuilds
G'day Everyone,
I recently had the Limbach factory questioning about me rebuilding their
mailing list] Limbach engine
Hi Tom,
I am wondering if your valve springs are a little hard and they are beating the
seats a little.
regards
Rob
Rob Thompson
0429 493 828
On Wed, Dec 2, 2020 at 1:07 PM Tom Preisser mailto:t...@ecoflight.com> > wrote:
I replaced both
Hi Tom,
I am wondering if your valve springs are a little hard and they are beating
the seats a little.
regards
Rob
Rob Thompson
0429 493 828
On Wed, Dec 2, 2020 at 1:07 PM Tom Preisser wrote:
> I replaced both heads recently (575 hrs) and found significant intake
> valve "pocketing" on all
I replaced both heads recently (575 hrs) and found significant intake valve
"pocketing" on all four intake valves and seats. In other words, the valve
face and seat face were no longer flat but rounded, but still mated well
enough to give good compression. The wear had gotten to the point where
Yep all understood. I think that realistically looking at the VW head design
compared to a Lycoming for example the total cooling surface area is a lot
smaller on the VW. So heat removal is a bit more critical
But no real drama. It just means good maintenance ... watching tappets
clearances
The exhaust side of the inlet valve seat cops a lot more heat so can be
prone to distortion and heat hardening.
Nigel was investigating ceramic coatings inside the heads and ports to get
the exhaust heat out the pipe not into the metal.
Approvals to use ceramic coatings may be a problem. Possibly
Hi Rob.Sorry didn’t. Engine is back together again. What I saw was that
as I was lapping in the valves there was a darker area on the inlet valve seat
where it passes by the exhaust seat which I couldn’t get rid of by lapping.
Ian W
Sent from my iPhone
> On 2/12/2020, at 9:56 AM, Rob
Do you have photos of the distortion/damage to the valves and seats?
regards
Rob
Rob Thompson
0429 493 828
On Tue, Dec 1, 2020 at 6:55 PM Ian Williams wrote:
> Hi All,
>
>
>
> I thought an interesting situation I have had with these little engines.
>
>
>
> I “look after” ie the maintenance
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