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Cool Down to Ambient Temperature #4463651
07/19/17 07:07 AM
07/19/17 07:07 AM
Joined: Oct 2008
Posts: 1,352
MD
ET16 Offline OP
ET16  Offline OP
Joined: Oct 2008
Posts: 1,352
MD
I want to change some spark plugs. and I want to do it when the engine (Ford Duratec 2.5L) is cool. How long would I have have to wait if the car has been running?

Last edited by ET16; 07/19/17 07:16 AM.
Re: Cool Down to Ambient Temerature [Re: ET16] #4463662
07/19/17 07:13 AM
07/19/17 07:13 AM
Joined: Sep 2016
Posts: 1,418
Minnesota
bioburner Offline
bioburner  Offline
Joined: Sep 2016
Posts: 1,418
Minnesota
Depends on how hot it is outside. I've had a warm engine after 8 hours in the summer. I like to let things to sit overnight and go at the project in the cool of morning. Tackling tougher projects after a decent nights sleep helps keep ones cool when trying to work around some dumb engineers Rube Goldgerg.



97 Ford E350 D,99 F350 dually D
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Re: Cool Down to Ambient Temerature [Re: ET16] #4463680
07/19/17 07:31 AM
07/19/17 07:31 AM
Joined: Jan 2009
Posts: 2,474
wi
dave123 Offline
dave123  Offline
Joined: Jan 2009
Posts: 2,474
wi
Stone cold!

Re: Cool Down to Ambient Temerature [Re: ET16] #4463686
07/19/17 07:37 AM
07/19/17 07:37 AM
Joined: May 2009
Posts: 12,283
N.H, U.S.A.
ARCOgraphite Offline
ARCOgraphite  Offline
Joined: May 2009
Posts: 12,283
N.H, U.S.A.
I wanted to try denso TT plugs in my 2.5 my 2011 ranger to eliminate a high misfire count. I couldn't get the spark plug boots off! It was like they were glued on. Even large pliers wouldn't work - almost ripped a boot. And this is in a 6 month old vehicle. Good luck. Hopefully your car has COP ignition, not dual waste spark coil packs.

I still have the plugs new in box smile


2014 Nissan Rogue S CVT, OC#10 47272mi-QSUD10W30+5w20 Toughguard Filter; '17 Subaru Crosstrek CVT OC#2 ?? mi-SOA/Idemitsu 0w20 + SOA Filter
Re: Cool Down to Ambient Temerature [Re: ET16] #4463687
07/19/17 07:39 AM
07/19/17 07:39 AM
Joined: May 2009
Posts: 12,283
N.H, U.S.A.
ARCOgraphite Offline
ARCOgraphite  Offline
Joined: May 2009
Posts: 12,283
N.H, U.S.A.
4 hours should be fine for plugs (if you're not in Arizona). Stone cold is for valve lash.


2014 Nissan Rogue S CVT, OC#10 47272mi-QSUD10W30+5w20 Toughguard Filter; '17 Subaru Crosstrek CVT OC#2 ?? mi-SOA/Idemitsu 0w20 + SOA Filter
Re: Cool Down to Ambient Temerature [Re: ARCOgraphite] #4463699
07/19/17 07:44 AM
07/19/17 07:44 AM
Joined: Dec 2016
Posts: 279
Sav ga
NStuart Offline
NStuart  Offline
Joined: Dec 2016
Posts: 279
Sav ga
Originally Posted By: ARCOgraphite
I wanted to try denso TT plugs in my 2.5 my 2011 ranger to eliminate a high misfire count. I couldn't get the spark plug boots off! It was like they were glued on. Even large pliers wouldn't work - almost ripped a boot. And this is in a 6 month old vehicle. Good luck. Hopefully your car has COP ignition, not dual waste spark coil packs.

I still have the plugs new in box smile

I can be helpful today buy a can of WD-40 insert straw in can is the other end of the straw and stick it between the spark plug boot and the wire you can inject WD-40 into the boot it will slide right off boom , have fun


Detroit14l 1m75k mi bp schaffer9k 30k oil
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Re: Cool Down to Ambient Temerature [Re: ARCOgraphite] #4463967
07/19/17 12:00 PM
07/19/17 12:00 PM
Joined: Jan 2016
Posts: 339
Cheshire, England
barryh Offline
barryh  Offline
Joined: Jan 2016
Posts: 339
Cheshire, England
Originally Posted By: ARCOgraphite
Stone cold is for valve lash.


I believed and practised that for 40 years.

A few years back I set valve lash after the engine had been stopped for only 30 mins so it was still quite warm but nothing like hot enough to cause burns. I then left it overnight and checked them again stone cold. There was no measurable difference so now I'm a convert and set them during a normal service after I've drained the oil.


Barry

1979 BMW R45 (Triple QX 5W40)
2009 Mercedes C180K (Shell Helix Ultra 5W40)
Re: Cool Down to Ambient Temerature [Re: ET16] #4464112
07/19/17 02:30 PM
07/19/17 02:30 PM
Joined: Oct 2008
Posts: 1,352
MD
ET16 Offline OP
ET16  Offline OP
Joined: Oct 2008
Posts: 1,352
MD
I checked the car in question after about 3.5 hours and it was still too hot.

Re: Cool Down to Ambient Temerature [Re: ET16] #4464458
07/19/17 09:59 PM
07/19/17 09:59 PM
Joined: Jun 2011
Posts: 1,803
Crawfordville FL
SilverFusion2010 Offline
SilverFusion2010  Offline
Joined: Jun 2011
Posts: 1,803
Crawfordville FL
Are you opening the hood to let air get to the motor?


2010 Ford Fusion SE 3.0L V6, 181 miles M1 HM 10w-30

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