loss of power

[85 nissan]

I'v got an 86 nissan 720 Pickup it lost a lot of power all the sudden
There is a clicking sound in the rear of the engine near the last 2 plugs
and a white cloudy smoke coming from the tail pipe are these signs of a blown head gasket

[jimmymc]

You are correct...white smoke could be steam...are you having any overheating problems or coolant loss?

jimmymc

[85 nissan]

No, I've not loss any coolant or overheating problems and their is no sign of the coolant and mixing in the engine

[chugbug]

You have lost the head gasket between number three and four piston. If you do a compression test on those two cylinders, you will find you problem. I have a 86, and it is a common problem. Their is a web site for just 720 pickup owners if you would like me to post it. Lots of information about the 720.

Mark