cookie64 Posted October 11, 2021 Share Posted October 11, 2021 Hey, all its been a while, unfortunately have been out of action with a slipped disc but now getting stuck into fixing the truck (its sat with a blown head for 4 months) 😢 I had the coolant blasting out of the back of the head at the bulkhead so have today got the head off and to my surprise absolutley no sign of gasket failure anywhere, gonna be proper miffed if there's a pin hole in the rear blow off plug. Any way, whilst apart I noticed that my pistons have done a lovely job of flattening the end of my glow plugs off and I was wondering is there any way of adjusting the glow plugs so they down stick in quite as far? can follow up with photos if needed. Thanks Tom Quote Link to comment Share on other sites More sharing options...
Snagger Posted October 12, 2021 Share Posted October 12, 2021 That is curious. Are you sure the head and pistons are all 300 spec, not some from a 200? Quote Link to comment Share on other sites More sharing options...
cackshifter Posted October 12, 2021 Share Posted October 12, 2021 Curious indeed. Is there any danger of some pictures? Quote Link to comment Share on other sites More sharing options...
monkie Posted October 12, 2021 Share Posted October 12, 2021 Are the glow plugs the correct type? Quote Link to comment Share on other sites More sharing options...
cookie64 Posted October 12, 2021 Author Share Posted October 12, 2021 ill get some photos in a-bit basic info, I rebuilt engine about 8 years ago (it has always ran fine ever since) when it was rebuilt it was bored out and +20 thou pistons fitted, OEM 300tdi spec. piston protrusion height was measured and I ended up fitting a no hole 1.6mm thick gasket. glow plugs were never removed from the head at this time as they had been replaced with the head about 5 years earlier. Quote Link to comment Share on other sites More sharing options...
cookie64 Posted October 12, 2021 Author Share Posted October 12, 2021 Quote Link to comment Share on other sites More sharing options...
cookie64 Posted October 12, 2021 Author Share Posted October 12, 2021 Just did a resistance check over the glow plugs and they’re registering about .5 ohms which would suggest there’s nothing wrong with them except the obvious collision issue haha Quote Link to comment Share on other sites More sharing options...
Snagger Posted October 14, 2021 Share Posted October 14, 2021 The 300 head is thinner than the 200, so the tips of the injectors and glow plugs will be more off-centre than a 200’s. That is why the bowl in the piston crown was moved. Given that you changed the pistons for oversized, I suspect you have 200 pistons, so the bowl is in the wrong place for the head. It is also possible that the pistons are correct but fitted the wrong way around, so the bowl is offset in the wrong direction - the crowns have direction arrows near one edge, and the photo with the dented piston shows that arrow pointing aft, but I think it should point forward to the timing case. 1 Quote Link to comment Share on other sites More sharing options...
western Posted October 14, 2021 Share Posted October 14, 2021 just looked at that piston photo & wondering if they are 180 degrees out, the glowplug tip definitely shouldn't touch anything. Quote Link to comment Share on other sites More sharing options...
cookie64 Posted October 16, 2021 Author Share Posted October 16, 2021 Ahhh thanks, that explains it! so I messed up 8 years ago and put my pistons in 180degrees out oh well nice bit of learning for the future Quote Link to comment Share on other sites More sharing options...
western Posted October 16, 2021 Share Posted October 16, 2021 Check the engraved arrow on all 4 pistons first, it should face/point to front of the engine. Quote Link to comment Share on other sites More sharing options...
cookie64 Posted October 17, 2021 Author Share Posted October 17, 2021 Yep they definitely point to the back of the engine! not sure how I messed that up so badly At least we all know what happens if you get this wrong now! left as is for now and running sweet IMG_5136.MP4 Quote Link to comment Share on other sites More sharing options...
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