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**hatzie** · 04-21-2021, 04:42 PM

If a large section is completely or mostly plugged up it'll be stone cold or very close to that over the affected area. I would guess you could pick that out with a FLIR camera fairly easily. One of the nice things about that kind of tech getting to be more accessible in price.

Mildly restricted flow is a bit more difficult. Experience would make you better able to judge but most of us don't see that kind of problem because we use distilled water rather than tap water so we don't get the calcium deposits and heavy internal corrosion in modern vehicles that we used to see in the '70s & '80s.

04-21-2021, 04:42 PM	#13
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,915	Re: Overheating - If a large section is completely or mostly plugged up it'll be stone cold or very close to that over the affected area. I would guess you could pick that out with a FLIR camera fairly easily. One of the nice things about that kind of tech getting to be more accessible in price. Mildly restricted flow is a bit more difficult. Experience would make you better able to judge but most of us don't see that kind of problem because we use distilled water rather than tap water so we don't get the calcium deposits and heavy internal corrosion in modern vehicles that we used to see in the '70s & '80s. __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful.