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#1
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Don't do this. Srsly.
The coolant flow through the engine starts with the WP shoving cold coolant in the front of the block. Coolant moves to the rear of the block, circulating around all cylinders. At the rear of the block, coolant moves upward through large openings in the HG. It then flows forward through the cylinder head. exiting out the front side of the head to go to radiator. If the t-stat is left out, then some of the coolant will flow through the bypass circuit, instead of the radiator. If the HG is opened up everywhere, then the coolant will take the path of least resistance, coming in the block at the WP and going straight up to exit out the side of the head. Coolant will not be forced to circulate to the rear of the head or block. The coolant gage will not get hot because the coolant is not pulling waste heat out the back cylinders. BTW, the tiny holes in a HG are called steam holes, because they are supposed to allow air bubbles out of the block to prevent small air pockets from turning into large steam pockets. They are not for coolant circulation. HTH
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Thanks, Jim C. 1985 745 TD MT (project) 1986 A2 Golf GTDI swap LeMons racer (very not stock) 2001 Golf TDI (not stock) |
#2
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Quote:
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12mm pump heads, ARP stud kits and GTD nozzles available! http://d24t.com/showthread.php?t=1646 NA intake manifolds and 240 turbo pans for sale. Need d24 or d24t parts? PM me! Shipments done on fridays! 1982 242 D24+T/M46- Super pumped! Build thread: http://www.d24t.com/showthread.php?t=1545 1984 764 D24T/ZF build thread: http://www.d24t.com/showthread.php?t=1734 Diesel parts cars: 82 244,83 244, 84 244, 84 245, 85 745 |
#3
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Sorry for hijacking this thread but since you have a gasket to look at can you tell me where the oil ports are in the cylinder head? I have a D24T fitted to my boat and there is an oil leak from the front of the head behind the timing back plate, there is no sign of oil looking from the top but you can see it running down below the water pump. I have replaced the valve cover gasket so I am pretty sure it isn't the valve cover.
I once had a Ford Sierra which leaked at the front of the gasket at the oilway for a bit, then blew out suddenly, so I am wary of oil leaks. |
#4
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I believe it is the only tear-drop shaped hole (near the middle). This is oil pressure, return.... I would have to look at a block to determine.
Spenser |
#5
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The oil feed for the cylinder head is located around the cylinder head bolt on the injection pump side between cylinders 3 and 4. Or right behind the vacuum pump.
There is several drains, but I would highly doubt those would cause an oil leak.
__________________
12mm pump heads, ARP stud kits and GTD nozzles available! http://d24t.com/showthread.php?t=1646 NA intake manifolds and 240 turbo pans for sale. Need d24 or d24t parts? PM me! Shipments done on fridays! 1982 242 D24+T/M46- Super pumped! Build thread: http://www.d24t.com/showthread.php?t=1545 1984 764 D24T/ZF build thread: http://www.d24t.com/showthread.php?t=1734 Diesel parts cars: 82 244,83 244, 84 244, 84 245, 85 745 |
#6
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Yes indeed. Those holes are to direct coolant at the exhaust ports.
__________________
Thanks, Jim C. 1985 745 TD MT (project) 1986 A2 Golf GTDI swap LeMons racer (very not stock) 2001 Golf TDI (not stock) |
#7
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That's good to know thanks, the engine is fitted to a boat, I have just remembered that about 4 years ago the sea water pump which is located just over the front of the engine leaked saltwater over the engine, it is possible that the end of the camshaft has become rusty and damaged the seal. I may just put up with it until the end of the season as I don't have time at the moment to strip it down.
Thank you for your help. |
#8
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The Evans waterless coolant is high viscosity that concentrated antifreeze, almost a mineral oil. The printed instructions I got said remove the Tstat and all any bypass. The UK instructions on line say don't do any of that, leave the mechanics alone and clean and fill. The two extreme modes for the cooling system in my application are: 1. WOT up 10% grade to 14k feet, blowing 20psi of boost, pushing 8,000#. Here I need to suck all the heat out I can. 2. I stop at 14k ft and have lunch, the engine cools off. The engine idles 90% of the way back. Any heat produced is sucked out and I get white smoke and rough idle. I think I am really pushing the thermal loading envelope. So I added an extra cooling circuit for the inter-cooler, turbo and oil cooler. I can turn the pump and fan on/off separately. |
#9
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#10
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Yes, I have two of the 4k GPs. I'll put one facing the engine when it get it running. Getting closer....
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