New to site, new to Mopar overheating issues
I dunno yellow rose you must not be able to understand your own FSM. I mean your the one that entered it into the fray, so I'm playing by your rules on this. According to YOUR FSM All 1973 A/C equipped 318s and 340s regardless of heavy duty cooling equipped or not ALL had a 1.30:1 pulley ratio and a 6 bladed pump. All 340s without A/C regardless of heavy duty cooling equipped or not ALL had a 1.20:1 pulley ratio and the same 6 bladed pump It's all in black and white. The only oddball as far as pulley ratio is the 318 non A/C with a .95:1 pulley ratio and an 8 bladed pump.
So let's go back to your HD cooling 340 on this very page your showing off. According to your 1973 FSM. It didnt matter if your 340 had heavy duty cooling or not, the pulley ratio and number of pump blades was still the same 6 blade pump for non A/C at 1.20:1, and the same 6 blade pump at 1.30:1 for A/C. And the way this reads is that this part of the engine is unchanged weather it had heavy duty cooling or not. What was likely the only different things in a heavy duty cooling package was the size of the radiator, possibly the fan diameter and number of blades.
This was likely to keep it simple on the assembly line. Engines were built in one place, car in another they built 1 type of 340 with A/C one type without. Both had pulleys and water pumps specced for if they had an A/C compressor or not. When they were put in the car, a bigger radiator was added, maybe different thermostat, bigger multibladed fan, etc. Again I am going by your FSM page. 340 standard and 340 HD cooling used the same pump, same pulleys. So if that's the case how is it a heavy duty cooling package then? Aaaah the answer lies in The optional factory installed bigger radiator. This is done this way because it's a cheap way to add heavy duty cooling on the assembly line.
So looking at all that, you could take your stock 73 340 pulley setup and increase your flow with a 318 non A/C 8 bladed pump, and yes he probably could use some 73 340 non A/C pulleys and increase the ratio. That's if he can find them, or know for sure the diameters, part numbers, what they look like etc. However we dont know yet what's wrong with this thing. Obvious **** first, radiator. Is is sized right, is it partially plugged? After that does it have the right pump for the pulley ratio. With whats currently on there it should have an 8 bladed pump.
Since he does NOT have 1973 pulleys on the engine. His are 67-69 318-340 therefore you need to size the pump to go with the ratio that's on there. 8 blade non A/C pump. Being that both HD and standard cooling for 1973 340 in your FSM show same pump, and same pulley ratio for HD and standard cooling, then like they say in Texas "that dog dont hunt". And your theory doesnt hold water either unless your suggesting an 8 bladed pump and running the larger HD radiator on your A/C equipped 73 340 ya got.
I have not been rude to YOU up to this point however, as far as arguing with a stop sign goes, you sir are obviously the stop sign I have been arguing with. Maybe you should get on the line with Stewart Components yourself and they can show you how to read your FSM. Make sure they know your talking about stock stuff. Oh yeah that's right, nevermind, maybe you might learn something.
I dunno yellow rose you must not be able to understand your own FSM. I mean your the one that entered it into the fray, so I'm playing by your rules on this. According to YOUR FSM All 1973 A/C equipped 318s and 340s regardless of heavy duty cooling equipped or not ALL had a 1.30:1 pulley ratio and a 6 bladed pump. All 340s without A/C regardless of heavy duty cooling equipped or not ALL had a 1.20:1 pulley ratio and the same 6 bladed pump It's all in black and white. The only oddball as far as pulley ratio is the 318 non A/C with a .95:1 pulley ratio and an 8 bladed pump.
So let's go back to your HD cooling 340 on this very page your showing off. According to your 1973 FSM. It didnt matter if your 340 had heavy duty cooling or not, the pulley ratio and number of pump blades was still the same 6 blade pump for non A/C at 1.20:1, and the same 6 blade pump at 1.30:1 for A/C. And the way this reads is that this part of the engine is unchanged weather it had heavy duty cooling or not. What was likely the only different things in a heavy duty cooling package was the size of the radiator, possibly the fan diameter and number of blades.
This was likely to keep it simple on the assembly line. Engines were built in one place, car in another they built 1 type of 340 with A/C one type without. Both had pulleys and water pumps specced for if they had an A/C compressor or not. When they were put in the car, a bigger radiator was added, maybe different thermostat, bigger multibladed fan, etc. Again I am going by your FSM page. 340 standard and 340 HD cooling used the same pump, same pulleys. So if that's the case how is it a heavy duty cooling package then? Aaaah the answer lies in The optional factory installed bigger radiator. This is done this way because it's a cheap way to add heavy duty cooling on the assembly line.
So looking at all that, you could take your stock 73 340 pulley setup and increase your flow with a 318 non A/C 8 bladed pump, and yes he probably could use some 73 340 non A/C pulleys and increase the ratio. That's if he can find them, or know for sure the diameters, part numbers, what they look like etc. However we dont know yet what's wrong with this thing. Obvious **** first, radiator. Is is sized right, is it partially plugged? After that does it have the right pump for the pulley ratio. With whats currently on there it should have an 8 bladed pump.
Since he does NOT have 1973 pulleys on the engine. His are 67-69 318-340 therefore you need to size the pump to go with the ratio that's on there. 8 blade non A/C pump. Being that both HD and standard cooling for 1973 340 in your FSM show same pump, and same pulley ratio for HD and standard cooling, then like they say in Texas "that dog dont hunt". And your theory doesnt hold water either unless your suggesting an 8 bladed pump and running the larger HD radiator on your A/C equipped 73 340 ya got.
I have not been rude to YOU up to this point however, as far as arguing with a stop sign goes, you sir are obviously the stop sign I have been arguing with. Maybe you should get on the line with Stewart Components yourself and they can show you how to read your FSM. Make sure they know your talking about stock stuff. Oh yeah that's right, nevermind, maybe you might learn something.
