nolove

Water pump looks the same as the old one. It shares the same direction pull as well. The only different is the fins have a bit more of an edge to it apposed to the old one (normal wear and tear) Yea, but after a short distance it felt as if it was running hot with a very rough idle again. So basically the thermostat doesn't appear to change the problem. Have tried a 160 and two 180's prior to stove top testing. Thanks

No, I havent pulled the plugs since before the rough running. Thats a good idea, I will pull them and see what they look like. It may be running a bit lean but not severe. There actually is a aftermarket gauge installed into the thermostat housing but sadly it is not responding. Its a real cheap one.

The thermostat is a 160 Bottom hose is maintaining its shape, in fact it has a internal coil to prevent a collapse. The heater core was bypassed due to it leaking 7 odd some years ago. which I do not see being a dumb idea nor being even irrelovent. The car has not had a temperature issue since this was done; till now. Plus I haven't run a heater in any datsun I have owned. Although, I do agree it CAN help but this is not my issue. Motor has been timed The original temp sensor is nonexistent. Old car, who knows where and when it made its departure. So like I said above I need to just get a gauge on it and see what temperature it is getting to. Thanks

Yea, that may make for a good test indeed. I will try and figure something out to give it a test run. I bypassed the heater core about 7-8 years ago

The thermostat was tested on the stove. and prior to that I tested the vehicle without it in. The motor gets hot enough to where the car will not idle but yes, I need to get a working temp gauge on it. But I know the car is running hot. Have had it for many moons and has never operated at this high of heat before.

well, damn. I will get a temp gauge hooked up and get a better idea of what is going on. Thanks for the help!

Ahh, ok. I see. Just seems weird that all of a sudden I am having an issue after running this set up for quit some time now. Is it possible to have a blown head gasket without visible moisture coming out the exhaust? Although this motor is only 15k since rebuild but I suppose that dosent been sh*t

Oh no, sorry. I have a fan just not a fan shroud. Interesting about the rabbit radiator. So essentially what you are saying is there could be a air pocket?

Yea, I will have to get one. The radiator appears to be in good shape. Its a newer vw rabbit one. Maybe 5 years old but upon the flush the inside from what I could tell looked good. No fan shroud but it has been running for years with out one. Thanks for your help too.....

Dont have a working temperature gauge. But can feel the heat through the firewall as well as the radiating heat once the hood is propped. I suppose I need to get a gauge on it....... It is good once on the highway but in stop in go is when the motor just wants to die and runs real bad. The fan is sized right and has been on this vehicle for about 7 years with no ill effect.

72 datsun 510 running hot. Thermostat is functioning. New water pump. Water is circulating in the radiator. Entire cooling system has been flushed and the heater core has been bypassed. No leaks and no unusual amount of moisture coming from exhaust. Any idea? Maybe an obstruction in the block? :confused:

Any interest in a trade? I have a 72' 2 door 510 with a L20 5 speed lowered. Let me know if that interest you. If not no worries and good luck with the sale.