Oil temps way high after header install - Subaru Impreza WRX STI Forums: IWSTI.com
STI Forum
Join
Start New Thread Create Account Advertise FAQ Members List Contact
Oil temps way high after header install
Oil temps way high after header install
Go Back   STI Forums > > > Oil temps way high after header install
Reply
 
Thread Tools
Old 03-06-19, 06:21 PM   #1
brapp
Becoming A Master Contributor
Feedback Score: 0 reviews
 
Car: 2005 STi
Fav Mod: going from GR -> GD
My Threads
Posts: 652
My Subaru Parts for sale

Join Date: Oct 2015
Location: CO
brapp will become famous soon enoughbrapp will become famous soon enough
Default Oil temps way high after header install

Recently installed a set of Killer B headers on my car. I love them, but I'm a bit concerned about the increase in oil temps I've been seeing.

Before, the car would usually run around 180-200f around town and go up to 220f max on spirited drives through the mountains -- maybe creeping towards 230 if it was a really hot day or I was really pushing it. Track use would usually see temps maxing out around 250f.

Now though... I'm seeing 220 often around town (in the winter) and just yesterday hit 240 driving slowly up a mountain pass in a snowstorm. Keep in mind.. this was constant 3200 rpm, 30ish mph, no boost, outside temp was about 30f.

I'm wondering if the headers proximity to the oil filter is heating the oil significantly -- or, if the sensor in the drain plug is being overly heated from the outside.

I'm not too concerned about the 240f temp by itself... but the fact that I'm hitting that when it's below freezing out and the car isn't seeing any boost makes me pretty worried for 90f track days this summer...
brapp is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Sponsored Links
Advertisement
 
Old 03-07-19, 09:56 AM   #2
blurred
Advanced Contributor Level 3
Feedback Score: 0 reviews
 
Fav Mod: GTX2867R
My Threads
Posts: 364
My Subaru Parts for sale

Join Date: Jan 2006
Location: Toronto
blurred will become famous soon enough
Default Re: Oil temps way high after header install

Well sensor in the drain plug will probably be a good bet. Add some heat shields or put your sensor somewhere else. Logically do you think your overall oil temps could increase by having a better flowing exhaust?
__________________
Instagram - @blurredGTA
blurred is online now  
Likes 0 Dislikes 0
 
Reply With Quote
Old 03-07-19, 10:00 AM   #3
raisingAnarchy
Becoming A Master Contributor
Feedback Score: 0 reviews
 
Car: CBS '16 STI
Fav Mod: Driver mod
My Threads
Posts: 634
My Subaru Parts for sale

Join Date: Jun 2015
Location: OH, US
raisingAnarchy will become famous soon enough
Default Re: Oil temps way high after header install

I'm assuming you're tuned. Are the headers coated or just bare?

I've been having trouble with putting the temp sensor in the pan's drain plug location. I think most sensor/thermocouples aren't designed well enough to mitigate ambient temps. I just don't know where else to put it because in theory it really is the best spot.
raisingAnarchy is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Sponsored Links
Advertisement
 
Old 03-07-19, 02:06 PM   #4
8cd03gro
Advanced Mastery Level II
Feedback Score: 0 reviews
 
My Subaru Parts for sale

Join Date: Mar 2008
Location: San Francisco
8cd03gro is a jewel in the rough8cd03gro is a jewel in the rough8cd03gro is a jewel in the rough
Default Re: Oil temps way high after header install

Did you remove the undertray as part of the header install?
8cd03gro is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Old 03-07-19, 03:15 PM   #5
SubySal
Advanced Mastery Level I
Feedback Score: 1 reviews
 
Fav Mod: everything done so far
My Subaru Parts for sale

Join Date: Feb 2009
Location: Colorado
SubySal has a spectacular aura aboutSubySal has a spectacular aura about
Default Re: Oil temps way high after header install

Hey Danny,

This is my set up. I don't have any issues with false oil temp readings as far as I can tell. With the undertray winter temps peak at about 180ºF. Time Attack temps peak at 230ºF and track temps at 245ºF. Because I'm me I also throw a wrap of DEI gold tape around the oil filter.

SubySal is offline  
Likes 2 Dislikes 0
 
Reply With Quote
Old 03-07-19, 03:32 PM   #6
8cd03gro
Advanced Mastery Level II
Feedback Score: 0 reviews
 
My Subaru Parts for sale

Join Date: Mar 2008
Location: San Francisco
8cd03gro is a jewel in the rough8cd03gro is a jewel in the rough8cd03gro is a jewel in the rough
Default Re: Oil temps way high after header install

I saw my oil temps drop 10-15* across the board when I added a beatrush undertray after having none for a while because the plastic one started melting and I took it off. I imagine air just stagnates there without the undertray directing airflow.
8cd03gro is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Old 03-07-19, 05:37 PM   #7
SubySal
Advanced Mastery Level I
Feedback Score: 1 reviews
 
Fav Mod: everything done so far
My Subaru Parts for sale

Join Date: Feb 2009
Location: Colorado
SubySal has a spectacular aura aboutSubySal has a spectacular aura about
Default Re: Oil temps way high after header install

That could be. I know there's a lot of aero on the '06. I just use the plastic OEM undertray. I haven't had any melting issues in the 5 years I've been racing the car even with ambient temps over 100º at the track. I just put some DEI gold tape on the tray where it was close to the header.
SubySal is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Old 03-07-19, 05:53 PM   #8
Noximus
Advanced Mastery Level II
Feedback Score: 3 reviews
 
Fav Mod: 2015 STI Steering Rack!
My Subaru Parts for sale

Join Date: May 2013
Location: Canada eh?
Noximus is just really niceNoximus is just really niceNoximus is just really niceNoximus is just really niceNoximus is just really nice
Default Re: Oil temps way high after header install

The metal tray would be better overall as it'll act like a heat sink being cooled by the airflow passing underneath.

The plastic one will just hold it all in and only cool off by whatever air moves in between the tray and the headers.
Noximus is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Old 03-07-19, 05:58 PM   #9
Leemanfor
Master Contributor Level 1
Feedback Score: 0 reviews
 
Fav Mod: EFR 7163 Turbo
My Threads
Posts: 731
My Subaru Parts for sale

Join Date: Feb 2015
Location: Lochbuie, CO
Leemanfor has a spectacular aura aboutLeemanfor has a spectacular aura about
Default Re: Oil temps way high after header install

I'm planning on getting the metal undertray for my car here in a few weeks.

Interesting to see your oil temps too. I am buying Killer-B's oil pan and am curious my oil temps. I do plan on tracking my car
Leemanfor is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Old 03-08-19, 05:45 AM   #10
raisingAnarchy
Becoming A Master Contributor
Feedback Score: 0 reviews
 
Car: CBS '16 STI
Fav Mod: Driver mod
My Threads
Posts: 634
My Subaru Parts for sale

Join Date: Jun 2015
Location: OH, US
raisingAnarchy will become famous soon enough
Default Re: Oil temps way high after header install

Quote:
Originally Posted by SubySal View Post
Hey Danny,

This is my set up. I don't have any issues with false oil temp readings as far as I can tell. With the undertray winter temps peak at about 180ºF. Time Attack temps peak at 230ºF and track temps at 245ºF. Because I'm me I also throw a wrap of DEI gold tape around the oil filter.

Image Link
A little off topic, but can you share details on how you've insulated your oil temp sensor? Are you using the sender that came with the Perrin gauge? Is that a metal conduit covering the wire/sensor from the chassis up to the pan itself?

I read through your build thread on this topic again, but didn't find some of these details.
raisingAnarchy is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Sponsored Links
Advertisement
 
Reply

Thread Tools

Posting Rules
You may post new threads
You may 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

Similar Threads
Thread Thread Starter Forum Replies Last Post
GR Sedan: Without the “Ambassador” mask on Dspin_1080 GR-Members' Journals 3272 10-29-16 06:44 PM
Lets Talk Motor Oil It Is So Very Misunderstood Dspin_1080 2.5 Liter/Litre Factory Motor 44 01-12-12 05:14 AM
Free APS Manifold Offer for Limited Time. Big APS Shipment with New Lower Pricing! RallySportDirect GD-Vendor Classified Ads 31 05-12-09 12:37 PM
High Oil temps topend 2.5 Liter/Litre Factory Motor 12 06-30-07 05:49 PM


New To Site? Need Help? More

All times are GMT -8. The time now is 09:08 AM.


Powered by vBulletin
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Designed & Powered by Domain Architect
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.