wrong plugs installed on single port 1600 1966

[oldtech]

I have done everything I could think of with regards to overheating.

Carb jetting, correct vacuum distributor, rebuild correct carb 30 pict 1, correct tin pieces, tune up. But during the tune up I put the wrong Plugs Ngk B6hs.
The correct ones should be Ngk b5hs which are hotter. If I understand correctly the b5hs are hotter generating less engine heat. Is that correct
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The joy of saving money, buying a cheap part, is soon outweighed by regret, when the next catastrophic failure occurs. At that time the best parts have a certain luster that gleams regardless of price.
Current 1966 Beetle restored, passed vehicles Porsche 356 Super 90, Porsche 1987 Carrera 3.2 CAB, 1957 Oval top, 1952 Porsche 356. 1964 Beetle

[zerotofifty]

The hoter plug is not about a hotter running engine, rather a hot plug retains its heat more than a colder plug. a cold plug rejects the heat from its tip easier, and thus runs cooler. To hot a plug can lead to preignition, and may damage the plug. To cold a plug wont stay as clean, i.e. foul easy.

https://www.denso.com/global/en/products-and-servi...heatrange/
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Give peace a chance. No American war with Russia!

[Eric&Barb]

What RPM are you using for cruising??

Have you measured your cooling fan inside width out at the outer edge? Could be you have a 40 HP fan and need the wider 1500/1600 fan.
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In Stereo, Where Available!

[viiking]

How do you know you are overheating?
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1968 1500 RHD Lotus White Beetle since birth. In the hospital for major surgery
1966 Lancia Flavia Pininfarina Coupe - in the waiting room
Discharged: 1983 Vanagon, 1974 1800 Microbus,1968 Low Light,1968 Type 3

[rcooled]

[67rustavenger]

Check the engine compartment tar board (sound deadening) for a bulge right in front of the fan shroud intake.

I recently had to replace an engine due over heating. With the engine out. I found that the tar board restricted the cooling air to the fan shroud.
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Cheap parts are gonna disappoint you.
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