N9TE Posted September 12, 2012 Report Share Posted September 12, 2012 Hey, I was dropping my turbo gas head off at my shop and they asked me if anyone was looking for a diesel head they had done for a well known independent Peugeot shop that stiffed them. These guys are very well known and do great work so the head is probably 100%. Is there any difference between the XD2S and XD3T heads? If so, how to distinguish between them? Or are there more than 2 kinds of diesel heads. Quote Link to comment Share on other sites More sharing options...
Bean Posted September 12, 2012 Report Share Posted September 12, 2012 Pretty sure XD2S (2.3L) an XD3T (2.5L) were the same, but if it's an older diesel (XD90 2.1L) then I think they're different. That's just based on info absorbed off Peugeot-L though. Brian Holm or Rob Coutier would know for sure. *Edit - I do know that the water pumps are different between the XD2S and the XD3T however... Did they say how much they wanted? I might be interested if it's the XD3T head. That way I could build up the top end as unit with the egr-less manifolds so I can figure out an intercooler solution off the car. Leaning towards FMIC now with no mods to the intake - just need to ensure room is left for re-installing AC later on if so. Doing a top mount like the XD3TE is a lot of work to make it work with the non-intercooled intake I have. Rabin Quote Link to comment Share on other sites More sharing options...
JunktionFET Posted September 12, 2012 Report Share Posted September 12, 2012 The XD2S and XD3T heads are distinctly different. For one thing, the external casting looks different. The XD3T head came in two versions (both different from the XD2S). One of the XD3T iterations had exposed ribbing in the casting connecting the head bolt holes, in sort of an alternating V pattern. Beyond that, the prechambers are different--the XD3T being larger. The XD3T has larger exhaust valves I believe the cooling jacket around the water pump cutout is different as well. Quote Link to comment Share on other sites More sharing options...
Bean Posted September 12, 2012 Report Share Posted September 12, 2012 I was under the impression the head gaskets were the same for the XD2S and XD3T (maybe they still are?) so guessed they were the same casting. Thanks very much for clarifying Joe! Koll - I can try to get some close up pics of the XD3T head in my car for reference - see if it has that pattern Joe mentioned between the head bolts, or any other distinguishing features for visual confirmation. Rabin Quote Link to comment Share on other sites More sharing options...
N9TE Posted September 12, 2012 Author Report Share Posted September 12, 2012 If I got some pictures of it could you guys identify it? I think they want to move it as it's been sitting on the shelf in their shop all wrapped up. Quote Link to comment Share on other sites More sharing options...
Bean Posted September 12, 2012 Report Share Posted September 12, 2012 Joe likely could just looking at the picture - I'd just be able to confirm it was an XD3T head by comparing it to mine (at least to say it's the same style as mine anyway). Rabin Quote Link to comment Share on other sites More sharing options...
JunktionFET Posted September 13, 2012 Report Share Posted September 13, 2012 I'd be happy to take a look. I should point out that every XD2S head I've seen actually has "XD2s" stamped on it between injectors 2 and 3. Actually it's "XD2" in a large font size, and an "s" in a much smaller font size. None of the XD3T heads have any such markings. Quote Link to comment Share on other sites More sharing options...
Peugeottogo Posted September 13, 2012 Report Share Posted September 13, 2012 Joe hit the nail on the head, all the XD2S heads are stamped XD2. If it's a XD2S head I'd be interested in it Koll. Jeff Quote Link to comment Share on other sites More sharing options...
N9TE Posted September 14, 2012 Author Report Share Posted September 14, 2012 OK. The shop sent pictures: Quote Link to comment Share on other sites More sharing options...
Bean Posted September 16, 2012 Report Share Posted September 16, 2012 I guess that last pic kinda gives it away nicely... lol I guess Jeff has a nice rebuilt head to pursue now. Rabin Quote Link to comment Share on other sites More sharing options...
N9TE Posted September 16, 2012 Author Report Share Posted September 16, 2012 You should call Heads Up @ 253-833-4546 and ask for JoAnne. She runs one of the most respected head shops in the Pacific Northwest. Quote Link to comment Share on other sites More sharing options...
JunktionFET Posted September 16, 2012 Report Share Posted September 16, 2012 I haven't seen a naked XD head in a while, and seeing the port side makes me think what it would take to give it 8 proper ports. Clearly the coolant runs close to the surface as the heater core outlet is there as well as a few small freeze plugs. But I wonder if some careful cutting and re-welding new material is possible. Surely the cost to do that as well as fab new exhaust and intake manifolds would be prohibitive, but still... Quote Link to comment Share on other sites More sharing options...
Peugeottogo Posted September 16, 2012 Report Share Posted September 16, 2012 You should call Heads Up @ 253-833-4546 and ask for JoAnne. She runs one of the most respected head shops in the Pacific Northwest. Thanks for the photos and the contact number Koll. I'll call JoAnne tomorrow morning. Jeff Quote Link to comment Share on other sites More sharing options...
JunktionFET Posted October 2, 2012 Report Share Posted October 2, 2012 I was going over some crazy ideas in my head and came up with a weird proposal. I think the hot ticket for XD performance using stock parts would be an XD2S short block, XD3T cam, and XD3T head. Combine that with a VNT turbocharger with a high maximum boost pressure, a highly customized injection pump, and I think you could get a lot of power very reliably. - XD3T cam has higher lift - XD3T head has larger exhaust valves - XD3T swirl chambers are larger which would mean a lower compression ratio on the XD2S--better for high boost - XD2S has a short stroke which means lower pistons speeds and therefore less bore wear and better tolerance to high revs - XD2S reciprocating assembly is lighter--crank has 4 counterweights unlike the 3T which has/needs 8. XD2S pistons are lighter as well. Quote Link to comment Share on other sites More sharing options...
Peugeottogo Posted October 2, 2012 Report Share Posted October 2, 2012 Follow up on the XDS2 head, I confirmed that there are hairline cracks between the valves but pressured tested OK. I'm not in so if there is someone else, give JoAnne a call. Quote Link to comment Share on other sites More sharing options...
Bean Posted October 2, 2012 Report Share Posted October 2, 2012 I was going over some crazy ideas in my head and came up with a weird proposal. I think the hot ticket for XD performance using stock parts would be an XD2S short block, XD3T cam, and XD3T head. Combine that with a VNT turbocharger with a high maximum boost pressure, a highly customized injection pump, and I think you could get a lot of power very reliably. - XD3T cam has higher lift - XD3T head has larger exhaust valves - XD3T swirl chambers are larger which would mean a lower compression ratio on the XD2S--better for high boost - XD2S has a short stroke which means lower pistons speeds and therefore less bore wear and better tolerance to high revs - XD2S reciprocating assembly is lighter--crank has 4 counterweights unlike the 3T which has/needs 8. XD2S pistons are lighter as well. For peak or ultimate power I think you're bang on with that combo. Many VW IDI enthusiasts picked the 1.6 TD engine to chase the really big power numbers as well - some of them pushing 6500 rpm and big boost! I know of only a couple guys that have pushed the XD performance in Finland - but nothing like the VW guys have done. Same with MB diesels - there are some CRAZY builds out there, but again nobody really embraced Peugeot IDI modifications so I'm curious how they will do. I suspect they have TONS of untapped potential and I'm VERY curious to see what gains my TD project realizes with the upgrades I've got planned. Rabin Quote Link to comment Share on other sites More sharing options...
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