348 1990 348TS Engine out - What updates should I consider?

I recently bought a 348 that needed a waterpump. I'm a DIYer so I figured I'd give it a go.

See my progress on my thread here
https://www.ferrarichat.com/forum/threads/waterpump-catastrophic-failure-advice-needed.694792/

The pump had literally self destructed sending plastic and metal parts throughout the cooling system. I believe that I have recovered / flushed all the pieces from the cooling system but it meant a complete teardown of the motor. Everything is cleaned and ready to start re-assembly.

While I am here what else should I do/check ?

Car is USA model, door post plate says October 1990 manufacture date.
Car has
- motronic 2.7 ecus
- alloy cam belt covers
- denso starter
- nippon denso alternator

I searched a bit and looked at the DIYs posted but the closest I found was a list of the factory changes in this thread
https://www.ferrarichat.com/forum/threads/whats-wrong-with-the-89-348s.105953/

The car had a major in 2017 but only a few miles before the (new) waterpump shed its impeller then sat til now.

Is there somewhere a list of the things I should check before I put it all back together to make sure I have all the suggested updates for a relatively early 348 motor/gearbox?

It's got a new
- hill tensioner bearing set (I don't see a reason to change this but of course a new timing belt will be used)
- chain tensioner, tensioner plate and chain tensioner pad (still looks good - no wear)
- will get a new waterpump with metal impeller (though the previous one appears to have shed its lock nut somehow. I don't think the problem was the material used on the impeller. I will need to check the clearances of the new pump impeller and the housing as my housing was damaged).
- obviously all new gaskets. Not sure about seals, there's time on them but not much mileage but I would like to reset the clock for the next major and don't want to choose a false sense of economy. I saw no leakage from any of them but the car was sitting for a few years.

I thought I saw somewhere that
- the drive pulley fence (or is it cam wheel fences) should be tack welded (none of mine are loose yet)
- some bearing should be changed from roller bearing to ball bearing ?
- stake some lockrings in the gearbox?

(@ernie also posted a list of some items in this post - though the description of the things to check is brief and perhaps assumes I know what he is referring to in the first place)
https://www.ferrarichat.com/forum/threads/considering-a-1990-348-ts.673593/page-2

Maintenance items
- how to tell if I need new motor mounts ?(no evidence they were ever replaced but boy new ones are not cheap!)

OK not part of the motor/gearbox but 25mm spacers on the rear wheels are often suggested along with using updated (exactly what?) suspension settings

Thanks for any and all suggestions.

 

Thanks @chas-3 - my motor is in the target range (24403 < 24720) so I need to be sure I have the new bearing.

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@m.stojanovic I measure my fence thickness at about .7mm so I guess I need the new pulley.
I haven't made it all the way through the thread you linked but is there a place to get the 3mm spacer (or a kit of spacer + pulley)?

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@ernie - I am making my way through your list. I see a few uprated seals and o-rings from Hill Engineering but not a lot of the parts suppliers list the material (viton). Can I just go to a seal/o-ring jobber with the specs or do our regular suppliers have viton seals and o-rings as an option ?

How do I check for the cam seal drain hole ? I'm going to have to try some searches to know what to look for to see it it has been done on my car.

Thanks for the tips and suggestions so far.

 

Big update:

Thanks to @jqpd99 I have the ringnut tool to remove the cam drive sprocket and now have the front cover off.. Nice to have other 348 owners in town!

It looks like TSB10-34 was done to my car.

Inner drive pulley is ball bearing (SKF 6202-Z/C3)
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The outer bearing is marked NTN Japan 6304LUA1 (not sure if this is the Hill Eng one or not so I will put the Hill one in just to be safe).

The front cover parts (oil pump chain tensioner, pin, washer, snap ring and 355 tensioner plate) are installed and appear in good condition so will leave them.
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After the cam drive pulley discussion I will need to have a new cam drive pulley. Does my motor need the pulley shim that @Ferrarium created ?
My current cam drive pulley has a snout about 21mm long from the back of the pulley to the end of the flange (is this the short or long one?)
I assume I need to order the new one #144488
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Now for the NOT oil pump chain tensioner I have a problem. I guess all the black stuff on the oil pickup was not RTV but material from the tensioner pad.
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Here's the problem. The pad is deeply grooved (in fact so deeply grooved that the chain is almost completely inside the pad) and looks like the pad material has been melted off.
I'm watching another thread in the 348 forum that is discussing holes in the pad (or lack thereof etc) and oil feed to the chain.
My pad is so melted I can't tell if it had a hole in it (but the tensioner/spring part does have the plastic pin/button inside).

Here's what the pad looks like
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Here's the pieces as they came out
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... and here is a closeup of the pad itself

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So I need a new pad for sure but maybe there is something wrong with my bracket assembly (or the oil feed or the way it was put together)?
I need to make sure this doesn't happen again.
I did not notice any rubber/plastic parts in the oil when I drained it nor in the filter but I did not cut the filter open.
I hope that cleaning the screen on the pickup is enough and that the filter caught any bits that made it past the pickup.

Other stuff
My 1-4 head exhaust cam seems to have the drain hole in the wrong place. How serious is this? I don't imagine there are any drilling jigs here in Canada.
I didn't contact Ricambi to see about getting theirs sent up here but I could.

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My cam oil seal housings seem to have the indented drain relief (now I just have to align them properly when re-installing them).
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My fuel pumps have good rubber (I already had them out to drain the fuel that sat for 5 years)

My coolant hoses are already silicone

My gearbox TOB flange and bearing are already fitted with the Hill Eng parts but I still need to check the other gearbox items mentioned.

Lots of cleaning done - feels like progress ...

Thanks for reading!

 

Indeed - the hoses were on the car when I got it so I don't know where they came from but you can use your favorite search engine and type

ferrari 348 silicone hose set

and you will get a number of options.


Mine are black and marked with a K and a number and appear to be a kit with the following markings:
- 4x 175.1 (90 degree elbows for rads)
- 175.2 and 175.3 water pump in & out
- 175.4 & 175.5 heater in & out
The kit does not seem to include the pipe from the water pump to the hear water manifolds nor the other small bore pipes from the coolant tank, etc

My car has only gone 500 miles since they were put on so I can't say anything about their longevity ...

 

... actually my silicone hoses may have come from superformance as I can see some of the other parts that were changed came from them (and they do list an "uprated silicone hose set" for the 348)