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+-- Forum: Engines (https://www.306oc.co.uk/forum/forumdisplay.php?fid=16)
+--- Forum: DW10 HDi section (https://www.306oc.co.uk/forum/forumdisplay.php?fid=10)
+--- Thread: The big question thread (/showthread.php?tid=20455)
RE: The big question thread - Dum-Dum - 28-01-2014
No upgrade. If you dont ra*e boost youll never break them again.
RE: The big question thread - Slam Wagon - 28-01-2014
Ok ill do my best not to then.
RE: The big question thread - Poodle - 28-01-2014
Back pressure is the issue there, another reason i'm not a fan of hybrids tbh. Turning the boost down should certainly help, i wouldn't hit the limiter too often either. I think i've done some damage to my valve train actually, have been pushing it too hard without a big enough hotside and now it sounds clattery lol.
RE: The big question thread - Slam Wagon - 28-01-2014
The centre pins look like they were coming out of a few of the others too, not sure if thats whats happened to those two. Plan is definitely to wind it down and have a look at this wastegate.
RE: The big question thread - Ruan - 28-01-2014
Not read rest of the thread, but I know it'll be blamed on them - this is NOTHING to do with Hydraulic Lifters before anyone blames it on that.
This is a valve spring problem - the valves are floating from too much backpressure - that's because the turbo simply cannot move enough gas and/or the wastegate isn't opening.
Either the valve springs need uprating or you need to monitor exhaust manifold pressure along with inlet manifold pressure. The tuning process will affect both, adding in lots of fuel at mid RPMs will increase drive pressure insanely, IMO with a hybrid turbo with relatively small hotside, you need to monitor exhaust pressure.
RE: The big question thread - Slam Wagon - 29-01-2014
No boost is being blamed. And that will be wound down before i run it again. The manifold pressure should be regulated by the external wastegate.
RE: The big question thread - Slam Wagon - 29-01-2014
Worth putting new ones in or worth checking the condition of the ones in my old engine?
RE: The big question thread - mcglynn - 29-01-2014
Ones in your old engine would do id say, they are pretty expensive new afaik
RE: The big question thread - Slam Wagon - 29-01-2014
£160 for a set of 8. Not a part that really wears is it.
RE: The big question thread - pro_steve - 01-02-2014
Hi Ian, can't reply to your PM as I'm new on this forum. Once you figure out how the boost is controlled we can finish setting it up, I was right on the rocker as soon as I heard that noise in your video
I'm sure they are designed to be the weakest link aren't they?
RE: The big question thread - Slam Wagon - 01-02-2014
I believe they are yeah, or it seems that way and would make sense. I think ive got it figured out but need to get it running and test it to see.
RE: The big question thread - Slam Wagon - 05-02-2014
Piston one 390psi, piston two 390psi, piston three snapped glow plug (sh*t), piston 4 290psi.
Engine back out
RE: The big question thread - Poodle - 07-02-2014
Stick with it mate, it's all steps in the right direction.
RE: The big question thread - Slam Wagon - 07-02-2014
I will, are there any upgrades or jobs worth doing if im getting the engine back out and opening it up?
RE: The big question thread - Ruan - 07-02-2014
Valve springs.
Even just slightly stronger will reduce the likelihood of what happened with smashing the rockers.
RE: The big question thread - Slam Wagon - 07-02-2014
Any suggestions for where to start looking for them?
RE: The big question thread - Slam Wagon - 09-02-2014
Piston 1 vs piston 4 at tdc. Bent rod by the looks of it
Am i able to take a single rod out my old engine and put it into this one? Tolerances arent too tight to do so or anything? ![[Image: FF4FBC2E-E436-4F4A-8732-0A99F3B634DB_zpsuvtqk7m2.jpg]](http://s205.photobucket.com/user/Silent_Rider-TP/media/car/FF4FBC2E-E436-4F4A-8732-0A99F3B634DB_zpsuvtqk7m2.jpg.html)
![[Image: E92032E1-BE11-4E8E-9AFB-DD89E89BD4FE_zpsajdv8unm.jpg]](http://s205.photobucket.com/user/Silent_Rider-TP/media/car/E92032E1-BE11-4E8E-9AFB-DD89E89BD4FE_zpsajdv8unm.jpg.html)
Ignore the oil marks on them.
RE: The big question thread - Poodle - 09-02-2014
Ah that'll do it!
Can't see it being a problem swapping a single rod, the tolerances on these engines aren't exactly fine.
RE: The big question thread - Slam Wagon - 25-03-2014
Back in action baby. Touch wood it last this time. Estimated 175-180bhp with 23psi. Such a fun car to drive. Blasting it all day with steve ironing out the last few bits. Mainly MAF related as its now got the 2.2 hdi maf. Bigger diameter and bigger ranges.
RE: The big question thread - pro_steve - 25-03-2014
Going well, just need to figure out that crazy external waste gate and then you're all done. Did it un-jam on the way home or still the same?
RE: The big question thread - Slam Wagon - 25-03-2014
Took it easy on the way home, just cruised up the motorway. Need to get some fuel before i give it some more stick.
RE: The big question thread - Poodle - 25-03-2014
Have you got a part number for that maf to hand? Simce mine is dead it'd be daft not to upgrade.
RE: The big question thread - Slam Wagon - 25-03-2014
Needs calibrating. You will have to talk to steve about the details of that vdo part number is 5WK9628Z and dealer part number is 1920 ag.
RE: The big question thread - pro_steve - 25-03-2014
Yes I can sort that out for you poodle, I think Ian has another coming in the post that he no longer needs but not sure on that?
RE: The big question thread - Poodle - 25-03-2014
Cheers guys, will see what i can find and text you, Steve.