Author Topic: 105 head o rings  (Read 1115 times)

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Alfa.mg

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105 head o rings
« on: November 23, 2020, 01:44:15 PM »
Hi all,
About to put the head back on my rebuilt berlina 2L engine. It had nothing keeping the o rings in place and all were in good condition. Does anyone in Australia stock the hollow brass pins Ive seen online to keep the o rings from collapsing inwards? Or if I were to use a roll pin, do I have to enlarge the hole so there is no restriction of the oil passage? Id prefer a method that didnt require drilling my block or head.
Thanks Mark
1983 alfasud TI 1.5 silver
1990 Alfa 33 cloverleaf 1.7 white
2001 Alfa 156 2.0 red
2003 Alfa 147 2.0 red
2001 Alfa 156 2.5 Monza silver (now)
1983 Alfa Sud TI 1.5 red (now)
1974 berlina 2000 white (1 too many)

john m

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Re: 105 head o rings
« Reply #1 on: November 23, 2020, 03:12:11 PM »
I've not heard of using brass hollow, steel roll pins are proven to work. They are widely available through the internet Alfa parts suppliers. Make sure you use Viton o-rings not the Nitrol ones supplied in head gasket kits. Another tip is to install the pins with the split facing the cylinders and not facing outwards. Knock them in 1-2 mm above the O-rings, when the head is bolted in it will press them down to correct height. Cheers. John
Now
84: GTV6 White-stock
84: Giulietta Red-club sprints
69: GTV1750 Red-on blocks
Then
71: Berlina 2000 man.-UK import

Alfa.mg

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Re: 105 head o rings
« Reply #2 on: November 23, 2020, 09:26:22 PM »
Thanks John, I have found international suppliers but nothing local. Was trying to avoid paying postage for six o rings and pins. Might just have to order some other parts while im at it.
1983 alfasud TI 1.5 silver
1990 Alfa 33 cloverleaf 1.7 white
2001 Alfa 156 2.0 red
2003 Alfa 147 2.0 red
2001 Alfa 156 2.5 Monza silver (now)
1983 Alfa Sud TI 1.5 red (now)
1974 berlina 2000 white (1 too many)

Alfa.mg

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Re: 105 head o rings
« Reply #3 on: November 24, 2020, 10:52:10 AM »
I bit the bullet and ordered a set of these from California. Probably over engineered now but I'm going to sleep easier knowing it won't leak from my o rings. I believe they just slide into original oil gallery. US25$ including 6 viton o rings.
« Last Edit: November 24, 2020, 12:05:38 PM by Alfa.mg »
1983 alfasud TI 1.5 silver
1990 Alfa 33 cloverleaf 1.7 white
2001 Alfa 156 2.0 red
2003 Alfa 147 2.0 red
2001 Alfa 156 2.5 Monza silver (now)
1983 Alfa Sud TI 1.5 red (now)
1974 berlina 2000 white (1 too many)

jayarr

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Re: 105 head o rings
« Reply #4 on: November 28, 2020, 08:49:05 AM »
Hi, can you share the vendors site?
Mito QV, Giulietta 1.4L 2014, Fiat 850 Sport, Alfetta GTV 2L
Past life: 33 1.5L, Fiat X1/9,75 V6 2.5L, GTV V6 3L 1998, 156 JTS 2L 2003

Alfa.mg

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Re: 105 head o rings
« Reply #5 on: December 20, 2020, 01:17:16 PM »
hi Jayarr, sorry didn't see your reply till just now. Here is their website. I rang and they were happy to help. I've installed mine now, was very easy, and I'm confident they won't be the source of future leaks. No drilling required, they fit snug into the factory oil galleries. They came with 6 o rings too. Just the standard round profile type.
http://www.alfapartscatalog.com
1983 alfasud TI 1.5 silver
1990 Alfa 33 cloverleaf 1.7 white
2001 Alfa 156 2.0 red
2003 Alfa 147 2.0 red
2001 Alfa 156 2.5 Monza silver (now)
1983 Alfa Sud TI 1.5 red (now)
1974 berlina 2000 white (1 too many)