1995 90CSQ Sport...Water Temp Needle Progessively Higher Over Months

[Mark R]

Could be lots of things.  Basics are first:
Pressurize system and listen for leaks (exhaust, under hood, etc.).  Is the
coolant the correct type and concentration?  Is the cooling system
maintaining pressure?

Then leak-down test.  Also listen for leaks.

With an unknown history, anything is suspect... from a bad thermostat to
blockages, to head, to head gasket.  How does the oil look?  (etc.).

Other than the specifications, the Bentley isn't necessarily the place to
start (amazed I said that).

Mark Rosenkrantz

On Thu, Feb 12, 2009 at 3:42 PM, <george.butler2 at verizon.net> wrote:

> Hello All,
>
> I acquired a 95 90CSQ Sport a week ago.  I've ordered the AoA/Bentley
> DVD...but in the meantime I trolling for BTDT's. The previous owner let
> it go because of an overheating problem ("water temp needle kept
> creeping up over time...then one day the engine began to
> steam...'managed to drive it home...engine never seized...it just
> constantly over-heats now...mechanic [his] thinks it might be cracked
> head...but there is no coolant smoke coming out of the
> exhaust...although...a head gasket had been replaced a few months before
> the major over-heating episode...'water pump was replaced about 10K
> miles ago". I have receipts to verify previous work.
>
> I've already located numerous diagnostic sequences to pursue in
> isolating the current over-heating problem...but I'd like to see if
> anyone on the list could provide an "oh yeah...BTDT...'turns out it was
> the______" .  Thanks in advance for any input.
>
> Regards,
>
> George B.
>
> 84 4ksq
> 88 5ksq
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