Alfa Pages

BigAl · P4 Joined: 06 May 2003 Posts: 2990 Location: U.K Surrey

What are the differences?
I had a plastic screw off top with no sensors in it and have replaced it with a metal twist off type.
Is the release pressure different?
Any comparable advantages / dis-advantages?
Should I get another screw off type for my 16v?
_________________
x2 33 16v
pictures http://www.alfa-pages.co.uk/viewtopic.php?t=5203

Scott Sander · Posted: Wed Aug 29, 2007 10:03 pm Post subject:

My 16V has the metal twist off type, no problems.
_________________
Scott Sander
'91 Alfa 33 Boxer 16V Monza - Awesome
http://www.sanderfamily.com

BigAl · P4 Joined: 06 May 2003 Posts: 2990 Location: U.K Surrey

That must have been changed like mine then Laughing

_________________
x2 33 16v
pictures http://www.alfa-pages.co.uk/viewtopic.php?t=5203

Scott Sander · Posted: Wed Aug 29, 2007 10:31 pm Post subject:

I bought the car when it had done 33,000kms with that style of tank. I am of the opinion that it was like that from new.
_________________
Scott Sander
'91 Alfa 33 Boxer 16V Monza - Awesome
http://www.sanderfamily.com

gritsop · Posted: Wed Aug 29, 2007 11:24 pm Post subject:

Hi,

Twist cap tanks were fitted to our 33s until 1991 continuing the series 2 tanks which were in stock.

Then the setup was changed to screw type until the end of production.

The funny (and frustrating thing) is that in case you need to replace the twist cap it costs 20 € being at the same time the price for a new screw type tank including cap Confused

I had this happen to me some days ago when my twist type cap failed and I had to replace it; the dealer told me that it is better to change the tank since it includes the screw in cap all @ 20€. However my twist cap type tank is almost new, so I paid for the 20€ twist cap Rolling Eyes

Regards,
_________________
Thanassis Gritsopoulos
1991 Alfa 33 1.4 IE
2001 Alfa 147 1.6 Distinctive

http://www.alfa-restoration.co.uk
Parts Shop: www.alfa-restoration.co.uk/shop

BigAl · P4 Joined: 06 May 2003 Posts: 2990 Location: U.K Surrey

Thanks for your replies, the temp now sits just below the line between the 80 - 120 mark, before it used to sit on 80. I have just put everything back to standard, ecu chip, airflow mod, 2 new HT leads, even before that im sure it was at 80.
_________________
x2 33 16v
pictures http://www.alfa-pages.co.uk/viewtopic.php?t=5203

BigAl · P4 Joined: 06 May 2003 Posts: 2990 Location: U.K Surrey

Well I just put everything back to how it was before, as in 5 min air meter mod, and chip. Still sits between 80 - 120, so it must be the tank??? Or the pressure release cap???
_________________
x2 33 16v
pictures http://www.alfa-pages.co.uk/viewtopic.php?t=5203

RFlower · Posted: Fri Aug 31, 2007 7:03 pm Post subject:

Tank and/or cap won't make any difference to engine temperature.

A higher pressure cap justs allows water temperature to rise more before it boils - the higher the pressure the higher the boiling point temeperature.

Did you get air trapped in water system when you refilled it?

Have you changed the temp sensor or altered the wiring to it?
_________________
Dick Flower, Nr. Carcassonne. '94 Trofeo 1.4 ie (F), '93 Imola 1.3/1.4 ie (now for breaking) (F), '91 1.7 ie (GB)(spare car), '86 Sprint 1.5 QV (F). '87 VW Syncro camper (F), '73 NSU Ro80 (F), '99 Fiat Seicento (F)

BigAl · P4 Joined: 06 May 2003 Posts: 2990 Location: U.K Surrey

ok, thanks for that, i did let engine cool down and reheat and checked levels. Not changed anything. when driving temp is as before, just below or on 80. Oh well Laughing

_________________
x2 33 16v
pictures http://www.alfa-pages.co.uk/viewtopic.php?t=5203