Simple overheating diagnosis

[ronmarabito2002]

The simplest way is to use an infra-red thermometer. Check the
inlet end of the radiator and then the outlet end. There should be
about a 15 degree swing in temperatures. If not, the radiator needs
to be cleaned out.

R.E. (Ron) Marabito, Dallas, TX 92WB40
Moderator



--- In WanderlodgeForum@yahoogroups.com, "transit360"
wrote:
> I'm working on an RTS (taking a break from my 2 Bluebirds),
> however my question is general and not specific to just one bus.
> How can I tell if I'm getting proper flow of coolant through
> the radiator? I will be purchasing an infrared non-contact temp
gun
> (where is the best place to get them?), but for now, I am
collecting
> advice on radiator dynamics.
> I got the old bus to operating temp, but while driving I
> notice she gets little hot. I checked the radiator when I got home
> and on the outside I put my hand on it and was NOT hot to the
touch.
> The tanks on either side were super-hot. I shut the bus off and
felt
> the inside (towards the engine), and the top of the radiator was
> warm, not hot, and the bottom was hotter. What does this tell me?
> I did find on hot spot on the lower part of the radiator,
and
> after looking contributed it to being clogged with oil and dirt.
The
> rest of the fins looked good. What's the best way to clean the
fins
> in the radiator?
> My fan is working great, coolant is good. Any suggestions on
> diagnosing a worn water pump? Just looking to get this thing
running
> as cool as possible. Thanks.
>
> Steve
> '79 GMC RTS and 2 '98 Bluebird QBRE's