skauldy Posted August 6, 2019 Share Posted August 6, 2019 Hi folks, anyone have or know of a 4lt V8 non crossbolted block/engine for sale. Don’t mind what condition as I just want the block. Any help would be great, thanks Shane Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted August 6, 2019 Share Posted August 6, 2019 I think all the 4.0 were cross bolted. Later 3.9s had all the bosses for the cross bolts, but no drilling, are those the ones you mean? If so, look for a serpentine 3.9. Quote Link to comment Share on other sites More sharing options...
skauldy Posted August 6, 2019 Author Share Posted August 6, 2019 Hi Bowie, im told the early 4’s were non crossbolted, I need the block to be Gems shane Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted August 6, 2019 Share Posted August 6, 2019 My 4.0 is from 1995 and is cross bolted... 1995 is about as early as they came. Quote Link to comment Share on other sites More sharing options...
skauldy Posted August 6, 2019 Author Share Posted August 6, 2019 carp lol right maybe change of plan Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted August 6, 2019 Share Posted August 6, 2019 What are you attempting to do? Quote Link to comment Share on other sites More sharing options...
skauldy Posted August 6, 2019 Author Share Posted August 6, 2019 I want to transfer the internals of a 4.2 into a 4 and then run it as a Gems using tornados ecu Quote Link to comment Share on other sites More sharing options...
smallfry Posted August 6, 2019 Share Posted August 6, 2019 All the 4 litres used bigger crank journals, so the nearest block you will get is the late serpentine 3.9,which has the crossdrill type bearing caps and cylinder block webs, but is not actually drilled. It could be though. Crank sensor could also be grafted on. Don't know if anyone does some sort or main bearing spacers though. Bit of a bodge though. Quote Link to comment Share on other sites More sharing options...
garrycol Posted August 7, 2019 Share Posted August 7, 2019 All 4.0 block are cross bolted and have larger diameter crank journals. The 4.2 is a development of the 3.9 engine so you will need a 3.9 block to put the 4.2 crank into. The journals on the 4.2 crank are the same as the 3.9 crank. If you want the resultant engine to still be a Gems - all the Gems stuff will still bolt on but you may need to change the timing cover etc. As the 3.9 block has the cross bolt pads you may want to consider drilling them and the main bearing caps and making them cross bolted but is not totally needed. Quote Link to comment Share on other sites More sharing options...
skauldy Posted August 7, 2019 Author Share Posted August 7, 2019 Thanks for all the replies guys. Apology’s I was lead to believe the early ones weren’t cross bolted and had the smaller journals allowing me to swap the internals over . i have a Gems 4.6 and have all the bits I need but it’s the crank sensor on the rear that’s throwing me off this is why I wanted the 4lt block. Back to the drawing board I may just go 4.6 but I’ve rebuilt the 4.2 and it’s fitting in the def Shane Quote Link to comment Share on other sites More sharing options...
garrycol Posted August 7, 2019 Share Posted August 7, 2019 The 4.6 and 4.0 blocks are the same so the issue that you have with crank sensor on the 4.6 would apply equally with the 4.0 block. Quote Link to comment Share on other sites More sharing options...
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