Thread: 300 Tdi head fitting

thats where they go, I have on predrilled into a plate on a turbo thats waiting for install, feel free to drop round tomorrow morning and I can drill and tap yours to suit if you need it.

The Tdi now has VDO boost pressure, EGT and water temperature gauges so at least now I have some idea what's going on inside. At first I thought the temp gauge was faulty but I pulled it all back out and set it up on a small battery in the kitchen and boiled up some water in a saucepan, checking it off against a digital thermometer from zero to 100 degrees and it's spot on. Will check what the thermostat is when the head comes off but I guess it must be about 77 deg. Couldn't get a reading above that in the vehicle. The vent in the guard seems to have dropped temps a bit.
So Dave, I know what you mean now by driving by the EGT. I'm not sure what temps I'm after but I don't think I'll Be giving her any more fuel. If I hold it flat up a long hill in 5th on the highway at 110 plus the EGT climbs to 700 deg at 16 lb boost, as soon as I back off it comes quickly back to 400. Cruising at 100 it stays around 350 to 400 depending if it's going uplill or down. Makes me wonder what it got to when I flogged it up the toowoomba range the other week, maybe ignorance is bliss?
So I assume having the gauge before the turbo it reacts a lot quicker to throttle as the turbine would take time to heat and cool?

yep, and it gives you a reliable temp figure because the post turbo numbers are a little rubbery as the turbo draws a variable amount of power from the exhaust (remember the engine is only a heat pump and heat=engergy)

I think we need to play with the turbo setup a little (configure it like I showed you on my tdi200)

http://www.aulro.com/afvb/1521229-post17.html


theres my usual speil.

If it won't go over 77*, the oil t/stat might be stuck open ?

Had that happen last winter.

BTW, if you up your boost a touch EGT's will drop, but I can scream past 720* if I hold it flat up the range here @ 17psi.

Was a cool day today, will see what happens on a hot one.
Will change a few tubes around when I do the head, need to do an adaptor for the bolt in the back of the manifold. Was the boost control you put into the manifold Dave wasn't it?
Things seem happy when i drive her like a grown up.
Edit, I replaced oil and water thermostats in '09, SHOULD still be okay.

boost actuator (the one on the turbo) should come from the manifold.

Took her for a run today, 270 km around the mountains, really had to be trying to get EGTs above 600 deg, cruising is still 350 to 450 at 100Ks, drops quickly on no throttle. Water temp won't make 80 deg no matter how hard I push it and is mostly low 70s, maybe it's air cooling a bit now that it has such a big vent in the guard? Either wat I'll check the thermostats when I pull her apart, probably start that tomorrow.

It lives! This arvo I finally got her on the road again, after a new Turners "flowed" head, timing belt, idler and tensioner, a few serpentine belt idler bearings, new head gasket, new turbo, cleaned out radiator and intercooler as well as oil and filters. Did hurt the wallet a little but it runs smoother and the new turbo boosts a little quicker also the top end is improved so that at overtaking speeds the acceleratation times from 85 to 110 ks are noticeably better. And now it has a thermostat that closes fully the temp stays right on 92 deg. The turbo seems to have the wastegate set to 15 psi from Garrett which suits me fine.