TheHarv Posted October 18, 2007 Share Posted October 18, 2007 Trying to positively ID these: No. 1: about 2in northeast of where the dipstick goes into the block. It has an oversized copper washer, the plug seems to be fractionally smaller than M22x1.5 - is this the coolant drain and if so what size/pitch is it? No. 2: between two of the head bolts, right opposite the No. 4 intake runner close(ish) to the stock water temp sender (I think), the plug is brass FWIW I'm trying to find lower and upper coolant locations where I can plumb in a convection-type electric heater for winter... would love a Webasto/Eberspacher diesel one but they're about $1500 here - leccy ones are only $90 but don't come with pumps else I'd put it in line with the heater TIA for light shed John H. -- Quote Link to comment Share on other sites More sharing options...
Les Henson Posted October 18, 2007 Share Posted October 18, 2007 On a civvy engine the water drain plug is higher up the block, made of brass, and is 13mm (1/2") (series engines have a tap there. The plug you show could be oil cooler return pipe fitting/turbo oil return, and looks like it goes straight into the sump. Picture No2 does go into the water jacket of the head - not sure of the purpose of the plug, but I have seen them before. Les. Quote Link to comment Share on other sites More sharing options...
TheHarv Posted October 18, 2007 Author Share Posted October 18, 2007 Thanks muchly I guess that's why no coolant came out of the bottom one when I unscrewed it There is a smaller one (looks like a 13mm 12-pt - like the brake caliper mount bolts) higher up - will snap a pic once it's light out Quote Link to comment Share on other sites More sharing options...
TheHarv Posted October 18, 2007 Author Share Posted October 18, 2007 This one? And is the big dimple above it what they call a 'freeze plug?' Quote Link to comment Share on other sites More sharing options...
Les Henson Posted October 18, 2007 Share Posted October 18, 2007 Yes, that's the drain plug - they are usually very tight. The 'freeze plugs' are known in this country as core plugs. If you are doing restoration work on the engine then it might be worthwhile replacing them. They are very cheap and easy to fit. One leaking is a major pain. Les. Quote Link to comment Share on other sites More sharing options...
TheHarv Posted October 18, 2007 Author Share Posted October 18, 2007 Thanks Les I'm just doing routine maintenance at the moment - my interest in the freeze/core plug is that I think it's where folks fit immersion-type electric block heaters in this part of the world I think I recall from the timing case inner gasket tutorial that they just pry out? and re-fit with some kind of sealant? Quote Link to comment Share on other sites More sharing options...
simonb Posted October 18, 2007 Share Posted October 18, 2007 Thanks Les I'm just doing routine maintenance at the moment - my interest in the freeze/core plug is that I think it's where folks fit immersion-type electric block heaters in this part of the worldI think I recall from the timing case inner gasket tutorial that they just pry out? and re-fit with some kind of sealant? Yep, stab in screwdriver, a pilot hole helps, then lever out or hammer in chisel to center, or sometimes using a punch on 1 side will pop them out. Clean up hole in block apply blue hylomer or red hermetite non setting sealant to edge of core plug. Hammer in using a socket as a punch until edge of plug is level/flush with edge of block hole. Quote Link to comment Share on other sites More sharing options...
TheHarv Posted October 18, 2007 Author Share Posted October 18, 2007 looks like a 13mm 12-pt - like the brake caliper mount bolts Doh! better get my eyes tested - for the record it's a regular 6-pt 1/2in Very coarse thread though And conveniently located so it pours on to the engine mount, producing a pretty 270* green fountain with diameter greater than that of the largest available bucket Quote Link to comment Share on other sites More sharing options...
TheHarv Posted October 19, 2007 Author Share Posted October 19, 2007 Can anyone confirm the P/Ns and/or sizes for the 2.5NA core plugs? I have found a heater listed for "1958-up 4-cyl" but I suspect that's only applicable to the 2.25 - the listed size is 1-15/16in (49mm) whereas mine seem to be at least 52mm Did the core plug size change between the 2.25 and 2.5 blocks? Quote Link to comment Share on other sites More sharing options...
Ex Member Posted October 19, 2007 Share Posted October 19, 2007 I would think you should be able to find a frost plug heater. Other options are lower radiator hose heaters or coolant cirulation heaters. Normally the coolant circulation heater would go in the cabin heater line. Last option is a glue on sump pad heater. What country are you in?? If North america, look at the Zerostart catalog, http://www.zerostart.com/pub_AppGuides.asp If Canada, I have a lower rad heater you can have for mail cost, though it is probably cheaper/easier to go to a store. Quote Link to comment Share on other sites More sharing options...
TheHarv Posted October 19, 2007 Author Share Posted October 19, 2007 Thanks, yes I checked the Zerostart application guide already - it lists 3100070 for "1958-UP L4 GAS/DIESEL" but I suspect that only covers 2.25 since the 2.5 doesn't officially exist in North America - and the stated plug size (1-15/16) appears a little too small. They don't appear to list anything bigger than 50mm. I may resort to a lower hose or circulation heater - but my ideal would be to fit a plug heater now while I have the alt and front exhaust pipe off that side - eventually I'd like to fit a Webasto circulation heater and just have the plug heater as a backup. Quote Link to comment Share on other sites More sharing options...
Ex Member Posted October 19, 2007 Share Posted October 19, 2007 Thanks, yes I checked the Zerostart application guide already - it lists 3100070 for "1958-UP L4 GAS/DIESEL" but I suspect that only covers 2.25 since the 2.5 doesn't officially exist in North America - and the stated plug size (1-15/16) appears a little too small. They don't appear to list anything bigger than 50mm.I may resort to a lower hose or circulation heater - but my ideal would be to fit a plug heater now while I have the alt and front exhaust pipe off that side - eventually I'd like to fit a Webasto circulation heater and just have the plug heater as a backup. How much too small? You say 2 mm? I'm sure that would be within tolerance of those things. Quote Link to comment Share on other sites More sharing options...
Ex Member Posted October 22, 2007 Share Posted October 22, 2007 http://www.britrest.com/Winter/heaters.htm Block heatersAfter a lot of searching we have found suitable block heaters for all older series and for the newer Defender diesels These heaters go direct into the water jacket - not the bottom hose with is very inefficient - so bad we will not sell them Made in Canada, tested by us! Defender 2.5/ 2.25 diesel / petrol = BRHTR02 $89.95 Also http://www.roversnorth.com/store/p-8435-bl...25l-diesel.aspx BLOCK HEATER 2.5L DIESELSKU: 8803609 Price: $110.25 Quote Link to comment Share on other sites More sharing options...
Phil Hancock Posted October 22, 2007 Share Posted October 22, 2007 http://www.britrest.com/Winter/heaters.htmAlso http://www.roversnorth.com/store/p-8435-bl...25l-diesel.aspx No 1 is the plugged port for the turbo oil return on TD engines. No 2 is for heater water feed in some applications. Quote Link to comment Share on other sites More sharing options...
TheHarv Posted November 6, 2007 Author Share Posted November 6, 2007 Follow up question - can anyone suggest which of the 3 core plug locations would be 'best' for a heater? Does one of them have more clearance / a bigger chamber behind it for the heater element? any issues of better/worse circulation? fwiw I tried britannica restorations but they never got back to me Quote Link to comment Share on other sites More sharing options...
Ex Member Posted November 6, 2007 Share Posted November 6, 2007 fwiw I tried britannica restorations but they never got back to me Phone... It is just one guy... He is there. He is very helpful and fair. Quote Link to comment Share on other sites More sharing options...
TheHarv Posted November 16, 2007 Author Share Posted November 16, 2007 Just wanted to update for the record - I ordered a Zerostart (aka Temro) 600W 'freeze plug heater' P/N 3100087 and it fits. I had to use the middle core plug (the front one is partially obscured). Size is 2.06in (52.3mm) - it's in the agricultural section of the application guide under Ford. Quote Link to comment Share on other sites More sharing options...
Ex Member Posted November 21, 2007 Share Posted November 21, 2007 A friend just tested that block heater in a 200TDI and it fits there as well. Quote Link to comment Share on other sites More sharing options...
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