jasper Posted July 11, 2010 Share Posted July 11, 2010 (edited) Like I said we can sit here and chitchat all day but its obviously working for me. One thing that I just thought of as to why it may be working for so long is that I have a metal shim HG. Don't you turbo guys run something else that will blow out? I don't know... I'm going to get my manual now. lol Your head gasket is irrelevant to this discussion. Almost 40 years experience, and as much reading, have taught me a thing or two. I work with automobiles and their problems EVERYDAY, far more complex than a 70's Datsun. My repairs don't come back. I learned all the concepts a long time ago. Do you honestly think you have a better understanding of engineering, than the people who designed the car you own today??? Edited July 11, 2010 by jasper Quote Link to comment Share on other sites More sharing options...
josh817 Posted July 11, 2010 Share Posted July 11, 2010 (edited) Your head gasket is irrelevant to this discussion. Almost 40 years experience, and as much reading, have taught me a thing or two. I work with automobiles and their problems EVERYDAY, far more complex than a 70's Datsun. My repairs don't come back. I learned all the concepts a long time ago. Do you honestly think you have a better understanding of engineering, than the people who designed the car you own today??? I think you're taking this too personally Jasper... My response to what you are saying though is I'm not out smarting you I'm simply stating that my system, which apparently is hooked up wrong, has been running for 2 years of daily use to everywhere I go and there has been zero overheating. Don't get flustered because I'm not having any problems and I am advocating something that clearly works for me. I'm still taking you're word on the subject though because I'm building a second motor since the car is being taken off the road and put into track use, where cooling demands will be more. As of right now, I would say my system is not hooked up wrong because obviously its working, and working means correct in my books because the purpose of the car and the job it was designated has been fulfilled. Jerry rigged: Yes Wrong: No Edited July 11, 2010 by josh817 Quote Link to comment Share on other sites More sharing options...
jasper Posted July 11, 2010 Share Posted July 11, 2010 Your illustration shows an OPEN themostat,and associated coolant flow, and does NOT illustrate the factory heater sytem. WHERE IS the diagram, showing coolant flow, prior to thermostat opening??? Quote Link to comment Share on other sites More sharing options...
josh817 Posted July 11, 2010 Share Posted July 11, 2010 Your illustration shows an OPEN themostat,and associated coolant flow, and does NOT illustrate the factory heater sytem. WHERE IS the diagram, showing coolant flow, prior to thermostat opening??? Dude I don't know, both Haynes and Chilton show the same picture. Lets open our own thermostats and cool down a little. Quote Link to comment Share on other sites More sharing options...
jasper Posted July 11, 2010 Share Posted July 11, 2010 I think you're taking this too personally Jasper... My response to what you are saying though is I'm not out smarting you I'm simply stating that my system, which apparently is hooked up wrong, has been running for 2 years of daily use to everywhere I go and there has been zero overheating. Don't get flustered because I'm not having any problems and I am advocating something that clearly works for me. I'm still taking you're word on the subject though because I'm building a second motor since the car is being taken off the road and put into track use, where cooling demands will be more. As of right now, I would say my system is not hooked up wrong because obviously its working, and working means correct in my books because the purpose of the car and the job it was designated has been fulfilled. Jerry rigged: Yes Wrong: No Working, or passable, does not mean correct. This would certainly be less than the designed parameters. The theory of operations sections in many shop manuals, is invaluable to understanding system operations. Quote Link to comment Share on other sites More sharing options...
jasper Posted July 11, 2010 Share Posted July 11, 2010 Dude I don't know, both Haynes and Chilton show the same picture. Lets open our own thermostats and cool down a little. Dude, I do know. I'm not hot. Just trying to help those that don't know. Quote Link to comment Share on other sites More sharing options...
josh817 Posted July 11, 2010 Share Posted July 11, 2010 (edited) I said I didn't know as in like I don't know where another diagram is that includes those, sorry. Edited July 11, 2010 by josh817 Quote Link to comment Share on other sites More sharing options...
jasper Posted July 11, 2010 Share Posted July 11, 2010 Don't feel sorry. Chilton's mostly, and Haynes, sometimes suck. They CAN'T,and DON'T show you EVEYTHING you need to know, about cars. I didn't learn all I know overnight. My type of knowledge takes DECADES to accumulate. Your college education that is forthcoming, will be far more valuable than my automotive knowledge............GOOD LUCK IN COLLEGE. Quote Link to comment Share on other sites More sharing options...
crazyoctopus Posted July 11, 2010 Share Posted July 11, 2010 so back to the point at hand... plugging is better than looping... Quote Link to comment Share on other sites More sharing options...
rossman Posted July 11, 2010 Share Posted July 11, 2010 Do your home work. Total system pressure is goverened by the RADIATOR CAP. Overall system blanket pressure, yes. I am referring to the pressure inside the engine between the water pump and thermostat restriction. The pressure there is much higher at 6500 RPM than the radiator cap pressure rating. Quote Link to comment Share on other sites More sharing options...
Leon Posted July 11, 2010 Share Posted July 11, 2010 Overall system blanket pressure, yes. I am referring to the pressure inside the engine between the water pump and thermostat restriction. The pressure there is much higher at 6500 RPM than the radiator cap pressure rating. Exactly! Jasper, how would the radiator cap sense pressure inside the block? It can't, it gets its readings from the radiator since that's where it is installed. The pressure between the pump and thermostat inherently has to be higher than pressure at the cap because of the restriction. Please read the thread that was linked here earlier before making more replies. Quote Link to comment Share on other sites More sharing options...
S130Z Posted July 11, 2010 Share Posted July 11, 2010 Now Juan, If you had just taken my word for it in the first place, we would not have had all this bickering Quote Link to comment Share on other sites More sharing options...
josh817 Posted July 12, 2010 Share Posted July 12, 2010 Now Juan, If you had just taken my word for it in the first place, we would not have had all this bickering Was totally worth it if you ask me. Quote Link to comment Share on other sites More sharing options...
S130Z Posted July 12, 2010 Share Posted July 12, 2010 Was totally worth it if you ask me. Hahaha, I totaly agree! (Although I do have a feeling this may go to the shed) Quote Link to comment Share on other sites More sharing options...
J240ZTurbo Posted July 12, 2010 Author Share Posted July 12, 2010 Guys, here comes the big question. Whats the diff between water coming from the front into the heater and returning back into the rear head and our other method? its still the same thing incoming/outgoing just a shoter route ... Quote Link to comment Share on other sites More sharing options...
rossman Posted July 12, 2010 Share Posted July 12, 2010 FYI, the port on the front cover is the intake to the pump. The pump will pull coolant from anything you connect to it. Unless you have the heater on, the path is blocked. Again, Search, this has all been discussed! Quote Link to comment Share on other sites More sharing options...
ktm Posted July 13, 2010 Share Posted July 13, 2010 (edited) Exactly! Jasper, how would the radiator cap sense pressure inside the block? It can't, it gets its readings from the radiator since that's where it is installed. The pressure between the pump and thermostat inherently has to be higher than pressure at the cap because of the restriction. Please read the thread that was linked here earlier before making more replies. Correct. The highest pressure in the cooling system is immediately after the pump, the lowest pressure is right before the pump. If you understand fluid mechanics, the radiator cap actually sees some of the lowest pressure in the cooling system as it is far downstream of the pump. Those of us blocking the heater bypass line are also running a turbo setup with a coolant cooled turbo. I've tapped #5 and #6 and route one to the turbo and the other to the lower t-stat housing. The turbo coolant drains to the water pump inlet. In this way I get some circulation prior to the t-stat opening up. The localized hot spots jasper is referring to are well known in the L6 heads. They occur around cylinders 5 and 6. Again, read the sticky at the top of the L6 forum. This thread should be deleted as it has been extensively discussed in the L6 forum. Edited July 13, 2010 by ktm Quote Link to comment Share on other sites More sharing options...
J240ZTurbo Posted July 14, 2010 Author Share Posted July 14, 2010 (edited) Just discover that in some l28 heads you will also find that they come with two side entries, one is control by the heater core, but the other has free flow from the radiator, I now belived there is no need for plugging. Edited July 14, 2010 by juan240z Quote Link to comment Share on other sites More sharing options...
josh817 Posted July 14, 2010 Share Posted July 14, 2010 Just discover that in some l28 heads you will also find that they come with two side entries, one is control by the heater core, but the other has free flow from the radiator, I now belived there is no need for plugging. What thread is that port anyway, if you know? Quote Link to comment Share on other sites More sharing options...
J240ZTurbo Posted July 15, 2010 Author Share Posted July 15, 2010 Not sure, Quote Link to comment Share on other sites More sharing options...
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