Alfa 33 16v Rebuild - Alfa Romeo Bulletin Board & Forums

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post #1 of 149 (permalink) Old 06-12-2007, 11:06 PM Thread Starter
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Alfa 33 16v Rebuild

As promised, I finally motivated myself (well actually just made the time), to upload some pics of my 16v project. I reckon it will be at least a month before I'm driving again but its going to be worth it. It really is amazing how previous owner's lie about their cars - Dismantling this motor only revealed it had infrequent oil changes with low quality oil.

Thankfully I didn't find any serious damage, the worst being some idiot replaced one of the valve guides with a custom oversized unit - so fitting a replacement valve meant another trip to the machine shop (cheers Dino246!).

Nice and clean...


Hopefully I'll be able to keep it this clean!

Crank awaiting to be dropped in. Hopefully I won't see this again for another 200,000 km.

Pistons and rods awaiting assembly and the new rings.



Stock pistons - would have been nice to used my forged units, but this is just a daily driver.

Everything was balanced, acid bathed, linished, etc. I'm awaiting return of the heads after the new valve guides are installed. Just about everything in the engine bay has been removed to be cleaned and rebuilt.

[FONT="Comic Sans MS"][U]Daily Drivers[/U][/FONT]
-'91 Alfa 33 series 3 16v
-'90 Alfa 164 3L 12V
[U]Projects[/U]
-'82 Alfasud Ti mid-engine Alfa V6 project coming soon!
[U]For Sale[/U]
-'82 Alfetta Sedan - in bits, take me, I'm free!

Last edited by budweiser_sud; 06-12-2007 at 11:10 PM.
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post #2 of 149 (permalink) Old 06-12-2007, 11:08 PM Thread Starter
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More pics:

Like my cam covers and intake manifold?

All good things come to those who wait - ever tried finding a replacement 33 16v front bumper at a decent price?! (That's not the final coat, just the primer!)

More to come!
~Benjamin

[FONT="Comic Sans MS"][U]Daily Drivers[/U][/FONT]
-'91 Alfa 33 series 3 16v
-'90 Alfa 164 3L 12V
[U]Projects[/U]
-'82 Alfasud Ti mid-engine Alfa V6 project coming soon!
[U]For Sale[/U]
-'82 Alfetta Sedan - in bits, take me, I'm free!

Last edited by budweiser_sud; 06-12-2007 at 11:11 PM.
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post #3 of 149 (permalink) Old 06-13-2007, 12:09 AM
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Looking good Ben, at least they used some good coolant! The heads were in good nick, shame about that one guide.

Have you tried out that high lift build undercoating gear? Hopefully get some sunshine to finish of that painting!

Good luck with the rest.

Regards,
Tim.

[COLOR="Navy"]Current Cars:[/COLOR]
- '69 S1 1750 GTV (TS conv.)
- '68 1750 Berlina (Father orig. owner)
- '90 & '88 75 3.0
- '85 S1 33 (X2)
- '74 Ferrari Dino 246 GTS
[COLOR="Navy"]Previous Cars:[/COLOR]
- '64 Guilia Sprint GT
- '91 75 TS
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post #4 of 149 (permalink) Old 06-13-2007, 12:20 AM
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Nice got to love the look of a new clean engine if only it stayed like that inside mmmmmmmmm
I loved my heads ooohhhhh ported and polished and new cams from colombo bariani.

I like the wrinkle finish on the cam covers nniiicccee.
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post #5 of 149 (permalink) Old 06-13-2007, 12:25 AM Thread Starter
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I might donate some money to Colombo Bariani in the near future!

Who did your porting and polishing? Did they run the heads on the flow bench?

Tim - what's that "high lift build undercoating gear" you mention?

~Benjamin

[FONT="Comic Sans MS"][U]Daily Drivers[/U][/FONT]
-'91 Alfa 33 series 3 16v
-'90 Alfa 164 3L 12V
[U]Projects[/U]
-'82 Alfasud Ti mid-engine Alfa V6 project coming soon!
[U]For Sale[/U]
-'82 Alfetta Sedan - in bits, take me, I'm free!

Last edited by budweiser_sud; 06-13-2007 at 12:30 AM.
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post #6 of 149 (permalink) Old 06-13-2007, 12:32 AM
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Quote:
Originally Posted by budweiser_sud View Post
I might donate some money to Colombo Bariani in the near future!

Who did your porting and polishing? Did they run the heads on the flow bunch?

Tim - what's that "high lift build undercoating gear" you mention?

~Benjamin
Nah for a daily i don't reccomend it and i got the street version....as if theres a bigger cam than what i gotDue to the increase in duration creating an increase in overlap the vaccumm at idle is a bit eratic. Plus power is a bit less below 4 but fun at higher.."no dear i only rev it to 3..."

I had Motorossi do my porting abd polishing, did a mental job on them. Surprising how much crap was grinded out of them to get them right..lots of imperfections from the cast. And the result is way more throttle response.
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post #7 of 149 (permalink) Old 06-13-2007, 12:36 AM Thread Starter
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I'm tempted to buy a decent die grinder and some nice diamond tools to have a go myself. Would probably be wise to experiment on a couple of old 8 valve heads first though before I touch the 16v!

~Benjamin

[FONT="Comic Sans MS"][U]Daily Drivers[/U][/FONT]
-'91 Alfa 33 series 3 16v
-'90 Alfa 164 3L 12V
[U]Projects[/U]
-'82 Alfasud Ti mid-engine Alfa V6 project coming soon!
[U]For Sale[/U]
-'82 Alfetta Sedan - in bits, take me, I'm free!
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post #8 of 149 (permalink) Old 07-26-2007, 05:12 AM Thread Starter
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Update!

I finally found some time to add some more pictures of the rebuild, i sure some of you will be interested to see how things are progressing!
Finally got the heads back after 4 weeks or so, had to have all new valve guides and 1, yes 1!!, custom guide as somewhere along the line someone forced in a slightly over size guide and messed up the fitment of a new one. But all is well now. Had the valves all reseated with the proper 3 angle grind for optimal valve sealing, so compression will be up to spec!
Also fitted the cams the right way round this time, someone fitted the inlet cam for the exhaust...duh!! (same side with the bad valve guide...why do people do these things??!!)Now onto the pictures...

The heads...



With cam covers...mmm

Block with headgasket and ready for heads...keeping it clean here!

heads on...

[FONT="Comic Sans MS"][U]Daily Drivers[/U][/FONT]
-'91 Alfa 33 series 3 16v
-'90 Alfa 164 3L 12V
[U]Projects[/U]
-'82 Alfasud Ti mid-engine Alfa V6 project coming soon!
[U]For Sale[/U]
-'82 Alfetta Sedan - in bits, take me, I'm free!
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post #9 of 149 (permalink) Old 07-26-2007, 05:20 AM Thread Starter
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more...

Mocked up with the intake plenum..also red wrinkle finish...

Gearbox was fully rebuilt with new synchros, dont skimp here!

Resprayed bumper and acessories, we do all painting in house..my brother (77SudTi) is very very good at it... these are before the 4 coats of clear went on...mmm shiny...



Thats it for now...more soon..keep and eye out!

[FONT="Comic Sans MS"][U]Daily Drivers[/U][/FONT]
-'91 Alfa 33 series 3 16v
-'90 Alfa 164 3L 12V
[U]Projects[/U]
-'82 Alfasud Ti mid-engine Alfa V6 project coming soon!
[U]For Sale[/U]
-'82 Alfetta Sedan - in bits, take me, I'm free!

Last edited by budweiser_sud; 07-26-2007 at 06:05 AM.
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post #10 of 149 (permalink) Old 07-26-2007, 05:28 AM
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thanks for the great detailed photos
those wide angle hemspherical twin cam heads are classic alfa plus multivalve

driving: a twin carb
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post #11 of 149 (permalink) Old 07-26-2007, 05:44 AM
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Absolutely...pitty Alfa dropped the 16V boxer...if it had more development it would be a beastly motor!

- '77 Sud Ti
- '88 series II 33 1.7
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post #12 of 149 (permalink) Old 07-26-2007, 01:49 PM
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I love seeing quality work!

Fantastic. I bet it will sound and go well too.
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post #13 of 149 (permalink) Old 07-26-2007, 09:53 PM
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Quote:
Also fitted the cams the right way round this time, someone fitted the inlet cam for the exhaust...duh!!
Wait, were not talking about ed are we? haha

Top work guys, shall be a nice tourer when complete. Still can never get over how compact these little units are!

This is making me want to get the toothbrush out on my engine
ciao.

147 GTA Q2
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Last edited by hughqv; 07-26-2007 at 09:55 PM.
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post #14 of 149 (permalink) Old 07-29-2007, 06:55 AM Thread Starter
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Another 4 hours work...

I was just going to clean up the 16v throttle bodies with some carby clean, but soon decided a complete strip down would be a better idea seeing as I've gone so far on the engine - they sure did come up well! Will post more pics soon...

~Benjamin

[FONT="Comic Sans MS"][U]Daily Drivers[/U][/FONT]
-'91 Alfa 33 series 3 16v
-'90 Alfa 164 3L 12V
[U]Projects[/U]
-'82 Alfasud Ti mid-engine Alfa V6 project coming soon!
[U]For Sale[/U]
-'82 Alfetta Sedan - in bits, take me, I'm free!
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post #15 of 149 (permalink) Old 08-05-2007, 07:19 AM
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Hi guys,
I'm just new on this board and I'm very anxious to see how this story continues?

-----------------------
[I]Tulipo[/I]

33 1.3s SW 88 (stored)
33 1.7QV 87 (stripped)
33 1.4ie 92 (daily)
33 1.3s SW 89 (restoring)
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