Outer Limits 4x4 Board

Hi. well the 4.2Td is now in the Gu, all running great however I now have an over heating problem. 100kph is fine, its only when I do 110, the temp rises. have flushed out radiator and even put in another one. any ideas?? also how do I et the tacho to work from 4.2 to the 3 litre cluster?/

Yorky.

You can get a custom one made up
with a bigger core
they rip your old tanks and reuse them
using bigger tubes between the top and bottom tanks