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PostPosted: Fri Mar 05, 2021 7:42 am 
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I think it is an early heat exchanger kind of thing. Those tubes go through coolant in the block. Provides a little warm up. Maybe? I don't know. I would have done it differently probably. Who knows, I am never surprised at Ferrari engineering anymore.

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PostPosted: Fri Mar 05, 2021 10:04 am 
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It doesn't look like much cooling, but I don't know what else was in the original system.
The 360 has a tube/shell oil/water heat exchanger in the valley where the coolant comes out of the cylinder heads.

Having a heat exchanger with coolant warms the oil up faster than an air-oil heat exchanger would... and then inherits thermostatic control from the cooling system without having to have an additional thermostat in the system.

I have a HUGE tube/shell HEX for the Northstar, but haven't run it yet. It's copper unfortunately, but I'd love to get an aluminum one.


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PostPosted: Sat Mar 06, 2021 10:31 am 
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Until we started this conversation I never gave any thought to the intent of the system....but it has to be cooling. The little tubes don't do much alone , but if you look, the oil is flowing the full length of the block surrounded by a nice rough internal surface (its cast) to stir and suck heat from the oil into a huge aluminum heat sink (block) with tons of area exposed to coolant in the galley. I suspect it probably works pretty well, not massive NASCAR oil cooler well, but way better than nothing. Now I'm happier :)

But for now, back to the engine (from the the powersteering for anyone who missed it http://gemellocattivo.com/forum/viewtopic.php?f=7&t=371 ) . I dropped the crank in last night so I can start playing with the timing chain. When I torn it apart I dropped the timing chain drive and it broke.....I suspect it was already cracked and for sure I could have welded it but I had a weak moment a couple years ago and bought a replacement ($100! from the salvage yard for just the housing....basically nothing ferrari is under $100 at the salvage yard -we aren't even allowed to call then junkyards ​​​​​​​) so last night I swapped the bits over. It probably won't fit.....I remember having trouble with the gears being too tight and binding on the 1st assemble and using a mallet and a couple other "ticks" to sort it.....which is probably how the housing got cracked in the first place. 1st up today is make sure that's working right without involving any hammers to speed thing up.


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PostPosted: Sat Mar 06, 2021 10:47 am 
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mk e wrote:
($100! from the salvage yard for just the housing....basically nothing ferrari is under $100 at the salvage yard -we aren't even allowed to call then junkyards ​​​​​​​)


What "salvage yard" sells anything from a Ferrari for $100?

mk e wrote:
I remember having trouble with the gears being too tight and binding on the 1st assemble and using a mallet and a couple other "ticks" to sort it.....which is probably how the housing got cracked in the first place. 1st up today is make sure that's working right without involving any hammers to speed thing up.


Come on, man! Making it fit with a hammer is classic Italian assembly technique! :lol:


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PostPosted: Sat Mar 06, 2021 10:37 pm 
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I installed the timing chain this morning and the engine refused to turn in either direction....it used to be it would only turn in the direction I fed the chain from during assembly which was weird enough.  After a couple hours I found the issue hidden behind a chain guide in the timing cover....a groove worn in the casting

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That had to be there from the non-modified days, at least that's what I'm telling myself because I had the locking up from my first assembly which I assume was caused by things not laying exactly as they did and chain in groove turns, chain out of groove locks is the thought.  Anyway, ground away the groove and the engine turns fine in both directions for the first time.  Yay.


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PostPosted: Sun Mar 07, 2021 9:09 am 
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TheDarkSideOfWill wrote:
mk e wrote:
I remember having trouble with the gears being too tight and binding on the 1st assemble and using a mallet and a couple other "ticks" to sort it.....which is probably how the housing got cracked in the first place. 1st up today is make sure that's working right without involving any hammers to speed thing up.


Come on, man! Making it fit with a hammer is classic Italian assembly technique! :lol:


forgot this bit...the new timing chain drive assembly popped right on with no issue at all....I'll bet ferrari fit the original with a hammer. I remember being really surprise there was an issue because the way the block warped meant I did no cutting at all in the front/rear mains and I was thrilled when I realized that would be the case which lead to shock when the timing chain drive didn't fit. But $100 part+zero effort and it does :)

The piston coating place ran my card so I assume they are done and on their way home but McMaster is saying the lapping bar will ship 3/15-3/22 so I have at least a week, time to go pull the cylinders back out and see if I can sort out whatever is wrong there while I wait....assuming I don't completely distract myself with power steering nonsense :)


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PostPosted: Sun Mar 07, 2021 7:39 pm 
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2 of the cylinder had spigots a little bigger than the rest and I think they were good but the other 10 got cleaned, roughed up, cleaned, jbweld.  Who knew it came in tubes that big, 10oz! so I knew I'd have plenty.  there will only be about 2 thou on the diameter on most when I'm done but a couple had a little taper and will end up with about 2-, which must be the ones that measured awful.

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That needs 24 hours so on too removing those little oil tube with a slide hammer.  The 1 came right out, the other needed a couple tries but its good its out as the hole is all corroded and looking like its on borrowed time.

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Then on to cylinder flanges not fitting.  I didn't cut the final sizes on the cylinder bores in the block a machine shop did, and I never measured then either, I just used the sheet they send me...I know..I know.  The spigots are all pretty good and pretty close to each other but up top there is about 4 thou big to small and the 3 smallest the cylinder didn't real fit in....what to do?  I decided that since they were so close and the cylinder do tap in that I could probably sort it with a bit of time and emery paper.  Tap the cylinder in, see where it hit, sand it away, try again, repeat until sorted.  On all 3 most of the issue was toward the front of the engine indicating the top holes were not completely in line with the spigot holes but its sorted now.  

I'm a little torn about whether or not to torque the bearing caps on and recheck everything because I suspect the head studs deform things in the opposite direction.....this might be a sleep on it question.


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PostPosted: Tue Mar 09, 2021 7:41 pm 
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pistons!


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PostPosted: Thu Mar 11, 2021 9:34 pm 
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I went out to the shop to work on the cylinders. Tuesday I tried to cut the jbweld and discovered the spigot end was going out of round.   I also discovered I can't machine jbweld to 1/2 a though thickness and I should have only coated the 4 that needed a couple thou....I'll need to just get it off the 6 its thin on.

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I made a support for the chuck end but it seems also needed one in the spigot.  I made that tonight but it needs to be to a couple tenths so I had to let it cool to finish it....so I ripped apart the steering, pulled the peddle box so I can see behind it, found where a mouse had been living at some point, and realized all to vent hoses are disintegrating.


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PostPosted: Sun Mar 14, 2021 3:57 am 
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mk e wrote:
Until we started this conversation I never gave any thought to the intent of the system....but it has to be cooling. The little tubes don't do much alone , but if you look, the oil is flowing the full length of the block surrounded by a nice rough internal surface (its cast) to stir and suck heat from the oil into a huge aluminum heat sink (block) with tons of area exposed to coolant in the galley. I suspect it probably works pretty well, not massive NASCAR oil cooler well, but way better than nothing. Now I'm happier :)



Is not the sole purpose of the o-rings on those tubes to let water into your oil so you think the motor has sh*t itself??

John


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