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PostPosted: Sat Jun 22, 2019 4:36 pm 
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848cc
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Joined: Thu Apr 03, 2014 10:28 am
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Location: Newcastle
quick update. The old 998 is out of the mini so that I can pull the gearbox for a rebuild and to slap under the twin cam. Can confirm you don't need an engine crane or a good back to pull the engine out! 43 years of schmutz to be cleaned out of the engine bay for a quick coat of paint to tidy the place up is the plan - gloss black to hide all the impending oil leaks ;)

Imagehttps://flic.kr/p/2gi39C4


I am still dubious about the oil return widget. It's tidy enough but I am contemplating adding a breather or at least have -AN fittings vice the hose barbs...

Imagehttps://flic.kr/p/2gi39Bh

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PostPosted: Sat Jun 22, 2019 6:17 pm 
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998cc
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Location: Brandy Hill, NSW
Won't the rubber pipes melt!


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PostPosted: Tue Jun 25, 2019 2:53 pm 
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Location: Wodonga - Vic/NSW border
cooperess wrote:
Won't the rubber pipes melt!


shouldn't... my heater hose is closer to my extractors than that

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PostPosted: Tue Jun 25, 2019 8:08 pm 
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848cc
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Joined: Thu Apr 03, 2014 10:28 am
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Location: Newcastle
Interesting about the heat affecting the hoses. The heater hose is just a mock up but it did get me thinking. I've decided that I will go to AN fittings, redesign the return widget and incorporate breather into it. A breather there and one on the bell housing should do the job just fine.

Quick update while I am here - engine bay got a quick respray to keep the newcastle rust at bay. Keeping with the bumblebee theme. Apologies for the rubbish photo

Image65286292_452350908646221_4192015452446130176_n

Crank and pistons are in now too. With standard thrust washers it's much too tight and rotation of the engine is way too stiff. Plenty of assembly lube but still no good.
Has anyone encountered a brand new crank with standard size washers being too tight? What's my best course of action from here?

Cheers,
Joe

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PostPosted: Fri Jul 12, 2019 12:34 pm 
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848cc
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Joined: Fri Jul 01, 2011 3:20 pm
Posts: 451
Location: Goulburn NSW
cooperess wrote:
Won't the rubber pipes melt!


No, but not good with oil!

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PostPosted: Fri Jul 12, 2019 12:39 pm 
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Location: Goulburn NSW
jpodge wrote:
quick update. The old 998 is out of the mini so that I can pull the gearbox for a rebuild and to slap under the twin cam. Can confirm you don't need an engine crane or a good back to pull the engine out! 43 years of schmutz to be cleaned out of the engine bay for a quick coat of paint to tidy the place up is the plan - gloss black to hide all the impending oil leaks ;)

Imagehttps://flic.kr/p/2gi39C4


I am still dubious about the oil return widget. It's tidy enough but I am contemplating adding a breather or at least have -AN fittings vice the hose barbs...

Imagehttps://flic.kr/p/2gi39Bh


When I was going to use this type of return everyone (Dr) said there would be to much blow back from the crank. What's changed?

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PostPosted: Sat Sep 14, 2019 5:25 pm 
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848cc
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Location: Newcastle
dalmeny wrote:
When I was going to use this type of return everyone (Dr) said there would be to much blow back from the crank. What's changed?


I don't think that the spinning crank would stop oil draining down into the block. As the crank doesn't sit in the oil it shouldn't be "flicking" large quantities of oil to the extent that it will stop oil draining under gravity like I have set up at the moment.

I might be completely wrong - but that's the joy of building engines and doing things we haven't done before.

Update to come in a few weeks. It's been a busy couple of weeks and it's coming along now! PS - I re-designed the oil return.... again!

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PostPosted: Sun Sep 15, 2019 8:22 am 
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Joined: Sun Apr 11, 2004 11:32 am
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Location: Sthrn HiLoLands, NSW, Australia
jpodge wrote:
dalmeny wrote:
When I was going to use this type of return everyone (Dr) said there would be to much blow back from the crank. What's changed?


I don't think that the spinning crank would stop oil draining down into the block. As the crank doesn't sit in the oil it shouldn't be "flicking" large quantities of oil to the extent that it will stop oil draining under gravity like I have set up at the moment.

I might be completely wrong - but that's the joy of building engines and doing things we haven't done before.

Update to come in a few weeks. It's been a busy couple of weeks and it's coming along now! PS - I re-designed the oil return.... again!


The Doc may have been more concerned about a little blow-by pressurising the sump :idea:

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