Forums/Z31P/z31-performance-upgrade-forums engine-mechanical-aa/Nissan VG valve differences
Imported from Z31Performance.com Forums{{#if:Doug| — original post by Doug}}{{#if:2014-01-28 03:07:15|, posted 2014-01-28 03:07:15}}{{#if:10| · 10 post{{#ifeq:10|1||s}}}}{{#if:/Z31performance_archive/forum/z31-performance-upgrade-forums/engine-mechanical-aa/23262-nissan-vg-valve-differences.html|
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Doug: (2014-01-28 03:07:15)
Nissan has used an number of valves for the various VG30 and VG33s with unknown performance differences and very different pricing - a full set of VG33E valves is just $53.58 from my local dealership while a full set of VG30ET is $135.36.
What I've found so far:
Year Model Intake
$
Exhaust
$
2002-2004 Xterra VG33ER 13201-0B000
$ 4.14
13202-7B000
$ 4.79
2000-2004 Xterra VG33E 13201-0B000
$ 4.14
13202-7B000
$ 4.79
1996-2000 Pathfinder VG33E 13201-V5202
$ 7.18
13202-V5210
unknown
1984-1989 300ZX VG30ET 13201-V5202
$ 7.18
13202-V6510
$ 15.38
1984-1989 300ZX VG30E 13201-V5202
$ 7.18
13202-V6510
$ 15.38
Ferrea F1843P
$ 23.68
F1844P
$ 24.86
Mr. 510 posted that there are special valves for supercharged VG33ERs on nissanpathfinders.net:
He even posted a picture:
But I get the same P/N for VG33ER and VG33E valves Xterras/Frontiers at courtesyparts.com and my local dealership. Questions I'm trying to answer:
- Are there special coated VG33ER valves? If so, what's the part number?
- Is there any meaningful difference between the older, more expensive VG30 valves and the newer, cheaper VG33 valves?
G-E: (2014-01-28 03:13:48)
As I recall the z31 exhaust valves are sodium filled for better heat dissipation which is the first part, looks like the vg33r may have a different size or profile altogether
Doug: (2014-01-28 03:54:02)
I'm not aware of any sodium valves in any VG30, easy enough to cut one up to check. The VG33ER heads are definitely identical OWO castings.
88sinZ: (2014-01-28 05:42:35)
Uh… yeah, i wouldn't do that. Popping a sodium filled valves can be very hazardous, and i highly doubt Nissan would put them in as OE.
besides that, FSM section EM list valve dimensions/angles and seat dimensions/angles similar between Z31 VG30E(T) and VG33E(R)
IMAGE LINK
VG33E(R) SD&S
VG30E(T) SD&S
VG33E(R) Valve Seat SD&S:
INTAKE
Exhaust
VG30E(T) Valve Seat SD&S:
Word to ya momma.
Doug: (2014-01-28 19:21:59)
Ordered 4 valves to compare: 13201-0B000 VG33E(R) intake, 13201-V5202 VG30E(T) intake, 13202-7B000 VG33E(R) exhaust, 13202-V6510 VG30E(T) exhaust. I'll post pics when they come in.
NissanEgg: (2015-02-07 18:14:58)
What happened to the pic update?
88sinZ: (2015-02-08 05:18:22)
The proof is above, what update do you need?
NissanEgg: (2015-02-09 13:55:44)
Pics of the supposed valves without markings or the "ceramic" coating.
jaqattack02: (2015-02-09 14:15:22)
Pics of the supposed valves without markings or the "ceramic" coating.
Yeah, the picture is in the OP.
NissanEgg: (2015-02-09 21:51:46)
I meant the pics of the actual valve differences that Doug was supposed to supply that shows the actual differences between all the part numbers.