Overheating

beetlenut · 2004-05-12T22:20:35+00:00

Hello,I have problems with 1600 dubble port Superbeetle. During normal driving with 60-65 mph on the highway I get an oiltemerature of 120 degrees Celsius and rising if don't slow down.I had ignition, carb. values etc. dubble checked but hadn't find any reason why.After a planned partial revison, with new cylinders,piston, heads, Bocar carb and a rebuild dizzy I have still the same problem, in the beginning a bit more cause of breaking in the new pistons.After the rebuild the car has less power (seems to me) and is still overheating. I checked the ramva archives and triple checked the dizzy, seems that the vaccumbox is not giving the same amount of advance as the old one. This can be a cause for the loss of power.Is it possible that the fuelpump can't deliver enough at highway speeds? Checking the fuel level in the carb is according to the specs.I think this is a nifty one as all the 'standard' causes are triple checked. Possible a sum of more minor malfunctions.Or a big stupidity by me;-)Here a list checkpoints done.TDC mark on pulley is okIgniton timing is 7,5 degrees BTDC with vaccumhose disconnectedDwell angle is 47 degreesIdlemixture is set to approx. 3,5% COIdlespeed is 900 rpmThe thermostat and cooling controle is triple check with the engine out and in the car. It opens complete.All airguides and plate are complete and assembled.Fanbelt tension is correct.Ok, somebody ready for the challenge?All suggestions are welcome,Claus

May 12, 2004 20 Replies

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Beetlenut 22 years ago

Hello Bob,

finaly check the complete tinwork. No gaps, head deflector tins made and mounted. Engine runs fine can't find any error in the adjustments. Called a local Bug specialist who also rebuilds engines and has a quite good name in tuning. According to him the temperature is quite normal for a 1600 DP. So I just continue breaking in and try to enjoy it.

Thanks a lot for all advice. If I find anything else regarding this topic, I will let you know.

Claus

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