What is the significance of the little triangle on the end of the head right behind the P/S pump?

Is there a difference between that head and an Eco head that doesn't have it ? ( years produced?)

Interesting

on my red car it HAS one, on my black car it does NOT have one, on my GM P&P head it does NOT have one, im not sure the differance either

both my cars are 2004 caviliers, red car oct 03, black car nov 03

-Ben



Overall Best times
60' - 1.857 (6/24/07)-(Drag Radials 205-50-15)
330' - 5.552 (6/24/07)-(Drag Radials 205-50-15)
1/8 - 8.690 (7/22/07)-(Conquesrt Radials 195-70-14)
M.P.H. - 81.87 (7/22/07)-(Conquest Radials 195-79-14)
1000' - 11.274 (7/22/07)-(Conquest Radials 195-70-14)
1/4 - 13.442 (7/22/07)-(Conquest Radials 195-70-14)
M.P.H. - 104.08 (7/22/07)-(Conquest Radials 195-70-14)

** ALL MOTOR **
* 181whp @ 7600rpm *
Website: www.benwenzeljr.com

2007 GM Tuner Bash Runner Up - Broken Pressure Plate
#1 Qualifer 13.857 @ 101.49

dude its egr...


Built&Boosted moar
04 Cavalier Turbo r.i.p my baby
2nd place 2009 GM tuner bash qwick 8--holla

Yeah, it's a provision for an EGR valve, and from what I can tell, it was phased out in early 2003. In fact, I can't say that I ever recall seeing any Ecotec with an EGR valve, hence, why it is not cast in on the newer cylinder heads.

As a side note, if you are using the pressurized oil port in the middle of the cylinder head for any reason, , the EGR plate is an absolute pain in the ass to work with. My oil line for my turbo just barely cleared after grinding the plate down a bit to make it thinner.




Currently #4 in Ecotec Forced Induction horsepower ratings. 505.8 WHP 414WTQ!!!
Currently 3rd quickest Ecotec on the .org - 10.949 @ 131.50 MPH!!!

yea it was put in in 2002-3 for use with egr but i guess they opted not to.



My car may run 18s, but I can do your taxes in 10 seconds flat.
JBO lube - they would never have enough in stock and we'd never see RodimusPrime again