Go Back   Infamous Nissan - Hardbody / Frontier Forums > Model Specific > Hardbody Forum (D21)

Reply
 
Thread Tools Display Modes
Old 02-20-2020, 11:17 PM   #1
smith
 
Join Date: Feb 2020
Location: Arizona
Posts: 26
Vehicle: 93 nissan d21
Thanks: 0
Thanked 1 Time in 1 Post
Default stuck wax thermo element?

No fast idle on start up. I noticed the wax thermo always stayed the same height- cold or hot (I took pictures and the movement was minimal). I sprayed penetrating oil on the piston and let it sit a couple of days and drove it to normal operating temp. Still no change. I looked around for a new one and while waiting, I took a long, flat end punch and rubber mallet and very gently tapped on the piston head. Loosened that puppy up. After the next drive the piston moved a lot. I'm wondering if anyone has freed up the element and how long that has lasted or is it very temporary? Or should I just order a new one?
smith is offline   Reply With Quote
Old 02-21-2020, 02:04 AM   #2
cadillacdude1975
The Gear Jammer
 
cadillacdude1975's Avatar
 
Join Date: Apr 2013
Location: Chattanooga, TN
Age: 47
Posts: 9,674
Vehicle: 87 D21 SE KC V6 2wd 5sp & 86.5 V6 SE auto
Thanks: 371
Thanked 1,139 Times in 1,051 Posts
Default

Mine never worked. I carbed my truck, so that fixed my problem lol
__________________
"Im officially lost" - wildbill
cadillacdude1975 is offline   Reply With Quote
Old 02-21-2020, 03:31 AM   #3
Deerhurst
4/86 SE-V6 2 tone 4x4 HB
 
Deerhurst's Avatar
 
Join Date: Apr 2013
Location: Oregon
Posts: 6,480
Vehicle: 1986.5 Hardbody
Thanks: 846
Thanked 732 Times in 670 Posts
Default

I was under the impression that the wax solenoid was a TBI thing not MPFI. Could it be a AB valve? Pics?
__________________
1986.5 SE-V6 4X4 D21 Hardbody
Pacesetter Long Tube Headers
Morimoto Mini D2S HID Projectors and Hella 500s
VG33i
Deerhurst is offline   Reply With Quote
Old 02-21-2020, 03:49 AM   #4
SBJ
Total Buzzkill
 
Join Date: Nov 2016
Location: OR
Posts: 2,618
Vehicle: '90 D21 4cyl 5spd 2wd
Thanks: 292
Thanked 432 Times in 387 Posts
Default

I think they used those all the way up to ~2004 on the VG and KA engines. I had this part fail too and swapped it with one from an extra throttle body I had. I'd probably keep it in the back of my mind and get a new one if it starts acting up again. But you never know.
SBJ is online now   Reply With Quote
Old 02-21-2020, 05:59 AM   #5
XoXSciFiGuy
 
XoXSciFiGuy's Avatar
 
Join Date: May 2017
Location: Auburn, WA
Posts: 2,373
Vehicle: 1997 D21 King Cab XE 2WD, 1998 Pathfinder.
Thanks: 152
Thanked 414 Times in 379 Posts
Default

Quote:
Originally Posted by Deerhurst View Post
I was under the impression that the wax solenoid was a TBI thing not MPFI. Could it be a AB valve? Pics?
You might be right. I don't recall seeing a wax solenoid on my 97...could be there I guess...never noticed one though.
__________________

1997 King Cab XE, 5-sp, canopy, AC/PS, KA24E, 120,000 miles. Need a technical manual? Drop me a message. Chilton's for amateurs.
XoXSciFiGuy is offline   Reply With Quote
Old 02-22-2020, 04:09 PM   #6
smith
 
Join Date: Feb 2020
Location: Arizona
Posts: 26
Vehicle: 93 nissan d21
Thanks: 0
Thanked 1 Time in 1 Post
Default stuck thermo element?

fuzzy pics. of wax thermo. Should not the head of the piston be seated on valve case when cold? If this first measurement is off by 1/8"- 3/16" then all adjustments are off too. If this is so, this meets my criteria for replacement. I like to know why a part is not up to snuff before I replace and not throw parts at my truck. Does the head of piston seat on the casing? It looks as if my attempt at pics failed.










'
smith is offline   Reply With Quote
Old 02-22-2020, 07:50 PM   #7
sdfp45
 
Join Date: Dec 2019
Location: california
Posts: 21
Vehicle: 86 Nissan D21
Thanks: 0
Thanked 3 Times in 3 Posts
Default

No it shouldn't rest on the case. Comes close but shouldn't touch, at least from what I've seen on my trucks. Probably needs to be replaced.

And be careful getting it out of the case. I broke my case trying to remove it and had to replace that as well. Things can get really stuck after 20-30 yrs of sitting in coolant.

Scott
__________________
86.5 D21 SE-V6 KC 4x4 500k mls
VG33i, Thorley Headers, Russ Cam Gears
Rear Discs and LSD, ARB Front, 21 gal fuel tank
86.5 D21 Z24i Longbed - all stock 220k mls
sdfp45 is offline   Reply With Quote
Old 02-22-2020, 08:28 PM   #8
smith
 
Join Date: Feb 2020
Location: Arizona
Posts: 26
Vehicle: 93 nissan d21
Thanks: 0
Thanked 1 Time in 1 Post
Default

Quote:
Originally Posted by sdfp45 View Post
No it shouldn't rest on the case. Comes close but shouldn't touch, at least from what I've seen on my trucks. Probably needs to be replaced.

And be careful getting it out of the case. I broke my case trying to remove it and had to replace that as well. Things can get really stuck after 20-30 yrs of sitting in coolant.

Scott
Thanks for the info. Mine has no case- it's in the throttle body- ouch. I have sprayed it with PB blaster a couple of time in prep. I live in Az, not so rusty here but definitely I will go easy.

Last edited by smith; 02-22-2020 at 11:14 PM. Reason: to make more sense
smith is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 12:40 AM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.