Re: Over Heating of E-28 535i

["Ron J" <ron@xxxxxxxxxxxxxxx>]

Hi Kevin

Yeah I have a bentleys finally.  As for your questions I have all the
service records for the car since new, and the rad was just replaced 6
months before I bought the car (bought it a year ago).  Its got a nice
aluminum rad in it, and it still looks new.  The hoses get warm, and the
thermostat works.  No clogs..,

I replaced the cap, and all is good.  The old cap had a decayed rubber
protruding seal in it, and also was missing the rubber ring missing.  I
picked up a new cap for $6.00 and all is good now..

Cheers
Ron
85 535i
73 911s 2.7 (poss for sale)
- ----- Original Message -----
From: "Kevin Miller" <kmiller1039@domain.elided>
To: <ron@domain.elided>
Cc: <bmw@domain.elided>
Sent: Thursday, May 08, 2003 7:37 PM
Subject: Over Heating of E-28 535i


> Ron's E-28 has been spewing coolant of late, with temp gauge in the 3/4
area.
> Here's my two cents, and some, on the matter.
>
> Ron,
>    I have to ask. Did you get your Bentley manual yet?:)
> Obviously the Check System circuitry is working OK.
>    Ten to one it's not the thermostat, but it depends on many areas.
> Is this the original thermostat?, has the car have a history of being
> maintained regularly? Lots of rust  with flushings?
>    If the top hose begins to warm after several minutes idling, it's
working,
> but you won't know how much unless you take it out, and compare it to a
new
> one:)
> If this is the original radiator, this is most probably the culprit, with
> sediment collecting
> or adhering to the coolant tubes, blocking many, and stenosing others over
> time.
> If you are privy to an laser temp gun, you can assess the radiator surface
> area for temp differences.
>    Water pump failure can be ruled out by feeling the top hose and bottom
hose
> circulation.
> Flushing the system is a waste of time and money until you accurately I D
the
> problem
> area.
> Radiator rodding will help a clogged one, but not 100%.  It's still
cheaper
> than a new one if your
> really money strapped.  The Roundel has a couple of Ads for inexpensive
> radiators.
> Another problem with old radiators is the top resin hose neck becomes
brittle
> with the hot/cold
> variances over time.  A fracture can and will develop, usually
unexpectedly,
> necessitating
> a stop, frustration, delays etc.
>    I had the hose neck fracture happen on the way to work.  It wasn't
pretty!
> Good luck,
>
> Kevin   88' 535i in Winter Park, FL with new Koni shocks&struts,and Dinan
> springs, Chipped,
> Metric Mechanic'd, and Split Second'd    Waahoo!     and-and Supersprinted
;)
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