Here is a suggestion.
If you look up 'casting sand' in the archives, you will come across a long
discussion from last year. Sand used during the casting process of the
block works loose over the years and gathers behind the rear cylinder. This
cuts down coolant flow and is a cause of overheating in Alpines. I was
backflushing my system several years ago and discovered grit coming out of
the drain. It wasn't until last year that I found out what it was, but I
haven't had any overheating problems since.
I got it out through backflushing. Others open the plug in the back of the
block the next time it is out of the car. As I said, look it up in the
archives.
Hope this helps.
Robert Bailey
> -----Original Message-----
> From: Silverstein, Steve [SMTP:Steve_Silverstein(at)bose.com]
> Sent: Wednesday, May 12, 1999 9:06 AM
> To: 'alpines(at)autox.team.net'
> Subject: Overheating SV
>
> My problem with the cooling system is looking more like a blocked passage
> in
> the head.
>
> I verified that there is a heat problem (gauge+sender ok). The radiator
> appears to be clean and flows very easy when water is poured in at the top
> and exits the bottom.
>
> I tried prestone flush last night which seemed to improve the situation
> slightly. At an idle for 5-10 min it would slowly climb without
> stopping.
>
> Any suggestions on clearing this without lifting the head? Drain-O?
> Lime-Away? Help me out here I don't want to lift the head!!!
>
> I will try back flushing the system tonight....
>
> Thanks for all the feedback.
>
> Steve Silverstein
>
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