water pump pulley

[northeast dmc]

Well, this is the second time, if not more that the pulley on the water pump has moved on the shaft. From what I have seen this is supposed to be a pressed on Pulley. So what are the options to resolve this if there is one? I do have another water pump with pulley on it, (brand new) it appears the one on the shelf has a collar on the shaft, where as the one on the car does not. I am guessing swapping the water pumps is the answer but if there is any other options I would be greatful to hear them.

Thank you.

[dmcnc]

Press-on pulley shouldn't be reused, otherwise they tend to walk off the shaft. You might get away with using a sleeve, but new ones are readily available. You can't press on a new pulley without removing the water pump. At that point you might as well install a new one or get it professionally rebuilt.

[Chris 16409]

After hearing similar issues from other owner I would not use a press on pulley. Bolt on pulleys are the way to go. You can get the bolt on pulley from DeLorean Go and a Volvo water pump from RockAuto. The pulley is reusable and can be swapped over the next time you need to replace the water pump.

https://www.deloreango.com/us/aluminium-bolt-on-water-pump-pulley.html

[northeast dmc]

After hearing similar issues from other owner I would not use a press on pulley. Bolt on pulleys are the way to go. You can get the bolt on pulley from DeLorean Go and a Volvo water pump from RockAuto. The pulley is reusable and can be swapped over the next time you need to replace the water pump.

https://www.deloreango.com/us/aluminium-bolt-on-water-pump-pulley.html

Thanks for the responses, I am not sure if pulley was reused as when i got the motor back it was all assembled. I do have an entire brand new waterpump with the pulley on. I am going to pull the one thats on there and replace with the one I have.

[northeast dmc]

Thanks for the responses, I am not sure if pulley was reused as when i got the motor back it was all assembled. I do have an entire brand new waterpump with the pulley on. I am going to pull the one thats on there and replace with the one I have.

Happy to report the waterpump swap was succesful, and in the process located a troublesome leak, the heads. Retorqued the heads as the motor was rebuilt. This solved the leaks, and found that the intake bolts where not very tight so hence an air leak. So back together and no leaks!! Now the headache is the hot start issue. Starts great cold, runs fairly decent, set the timing, and the idle is a little high. I am going to attempt to do the dwell to tune the CO in. What other options are there for setting the idle??

[dmcnc]

Happy to report the waterpump swap was succesful, and in the process located a troublesome leak, the heads. Retorqued the heads as the motor was rebuilt. This solved the leaks, and found that the intake bolts where not very tight so hence an air leak. So back together and no leaks!! Now the headache is the hot start issue. Starts great cold, runs fairly decent, set the timing, and the idle is a little high. I am going to attempt to do the dwell to tune the CO in. What other options are there for setting the idle??

On the high idle, your throttle plates might not be closed.

[Ron]

+1


...
What other options are there for setting the idle??There are none. The idle is controlled automatically.
If the high idle is a new symptom, suspect a vacuum leak too. (The system adds fuel to compensate for extra air...)

[bytes311]

The CO may have been adjusted to compensate for the air leak that is now fixed.

[northeast dmc]

+1

There are none. The idle is controlled automatically.
If the high idle is a new symptom, suspect a vacuum leak too. (The system adds fuel to compensate for extra air...)
Ok, thanks, so if the timing is set and I get the dwell reading where it should be then the idle should set it self so to speak? As long as the throttle plates are returning.

[Ron]

Ok, thanks, so if the timing is set and I get the dwell reading where it should be then the idle should set it self so to speak? As long as the throttle plates are returning.Yes, I.E. changing the timing, dwell setting, etc. shouldn't change the idle speed. The system will add or subtract air to force the RPM to a set value. When you check the throttle plates, make sure the idle switch is working properly. There is a sensor in the coolant pipe that tells the idle speed control system that the engine is cold also...

[northeast dmc]

Yes, I.E. changing the timing, dwell setting, etc. shouldn't change the idle speed. The system will add or subtract air to force the RPM to a set value. When you check the throttle plates, make sure the idle switch is working properly. There is a sensor in the coolant pipe that tells the idle speed control system that the engine is cold also...

Thank you, silly question. I have tried to look at pictures of different cars, and old pictures of my motor before I sent it out, and cant tell for sure the orientation of the idle speed motor. I tell myself it shouldnt matter but cant convince myslef 100%.

[Ron]

The ISM's electrical socket goes ~up...

[JBaker4981]

Ron is correct. The ISM bracket can only be mounted one way to the bracket that is on the left side of the Intake Manifold and it bolts down at an angle (top angled toward front of car)
62964

[northeast dmc]

Ron is correct. The ISM bracket can only be mounted one way to the bracket that is on the left side of the Intake Manifold and it bolts down at an angle (top angled toward front of car)
62964

Thanks, the picture is how I have it, minus the bracket that seems to have gotten lost from the time I shipped the motor out and got it back. Anyway my question was regarding the plug position. Would it make any difference if the plug for the wires was towards the firewall and not the front of the motor? If you simply turned the ISM 180 degrees in the bracket? Sorry to waste time on this, it is in correct.

[cis6409]

If it helps, there is an arrow on the ism motor itself if you look closely . When mounted It should point towards the cold start valve for correct orientation.

Shane

[FABombjoy]

If the airflow is reversed it will work, but strangely. You might not even notice until it's fixed, then you'll say, "oh, that is a bit better".

[JBaker4981]

Thanks, the picture is how I have it, minus the bracket that seems to have gotten lost from the time I shipped the motor out and got it back. Anyway my question was regarding the plug position. Would it make any difference if the plug for the wires was towards the firewall and not the front of the motor? If you simply turned the ISM 180 degrees in the bracket? Sorry to waste time on this, it is in correct.

My apologies, I misunderstood... The plug should be towards the back of the car. Airflow is unidirectional so you have to make sure it goes in one way. Do not mount the ISM where the plug is furthest from you

[northeast dmc]

My apologies, I misunderstood... The plug should be towards the back of the car. Airflow is unidirectional so you have to make sure it goes in one way. Do not mount the ISM where the plug is furthest from you

Thank you. Do you know what the single black wire that runs along the coolant line on the Passenger side is/does, I havent jacked the car up but it appears to go to the transmission possibly. The previous owner (my brother rest his soul) spliced it in to the hot wire going to the coil, does it need power or is it a ground?

[David T]

That wire is not "standard" and without knowing where it goes and what it connects to, there is no way to tell you what to do with it. Doubtful it is a ground, there would be no need to run it anywhere except to the frame. I would disconnect it and see what happens.