I am rebuilding my TR4A engine and I have an older spare engine that I can rob parts from. My question is: the later engine has a water pump with a boss with 4 bolts holding on the pulley (first picture). The older engine has a tapered shaft with a woodruff key with a different matching pulley (2nd pix). Also a grease fitting which the newer one has no lube option
Also the older engine has a crank nose with a shoulder dog bolt and holes for the fan (4th pix). The newer engine (already installed) has a regular dog bolt and no holes for the fan (3rd pix)
Also I can't find the torque spec for the dog bolt in the manual
What's up? Are these interchangeable? which ones should I use?
Al Shoop
Also the older engine has a crank nose with a shoulder dog bolt and holes for the fan (4th pix). The newer engine (already installed) has a regular dog bolt and no holes for the fan (3rd pix)
Also I can't find the torque spec for the dog bolt in the manual
What's up? Are these interchangeable? which ones should I use?
Al Shoop