Recent Topics
coolant capacity 06 lacross 3.8
by lucerne06
4 minutes 34 seconds ago
Touch-up paint thoughts? Mazda Velocity Red Mica
by d00df00d
35 minutes 4 seconds ago
FS: Various Detailing Supplies
by The Critic
44 minutes 47 seconds ago
Need photo software
by Eddie
53 minutes 12 seconds ago
The new Ram
by SteveSRT8
Today at 03:22 PM
Help me select my winter oil
by GSCJR
Today at 03:10 PM
2014 Jetta TDI any better than yrs ago?
by LoneRanger
Today at 03:03 PM
Royal Purple
by mauric3
Today at 02:24 PM
1998 Toyota Corolla Brake Issue
by 01_celica_gt
Today at 01:58 PM
Need info on Bosch Batteries
by Da Game
Today at 01:56 PM
Airbag recall now URGENT status by NHTSA
by 97tbird
Today at 01:21 PM
2014 Subaru Forester or Legacy
by phenix78_99
Today at 01:15 PM
Newest Members
Mkurmve, l1tech, greyghost, banderso, ovidiu
51649 Registered Users
Who's Online
116 registered (2oldtommy, 2009Edge, -SyN-, 123Saab, 2010_FX4, 05LGTLtd, 16 invisible), 1876 Guests and 174 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
51649 Members
64 Forums
221010 Topics
3493292 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG

Page 1 of 3 1 2 3 >
Topic Options
#2422832 - 11/01/11 10:30 PM Cold piston slap, thicker oil?
CBR.worm Offline


Registered: 05/10/05
Posts: 1422
Loc: Jupiter, Fl
My FX has always had cold piston slap, not bad. it goes away as it warms up, but sounds like a diesel when ambient temps drop below 60ish. I typically run M1 0w40. Should I go to something thicker when cold? Living in Florida I don't exactly need cold weather protection.
_________________________
'06 Infiniti G35 Sedan 6MT - 145k

Top
#2422837 - 11/01/11 10:38 PM Re: Cold piston slap, thicker oil? [Re: CBR.worm]
Dakota1820 Offline
formerly chevyboy14


Registered: 04/28/11
Posts: 3894
Loc: missouri usa
It probably won't make a big difference but is try it. Try 10w30 or 10w40
_________________________
2004 Honda civic vp -m1 5w30
1998 Saturn sl2 -mobil super 5000 5w30


Top
#2422849 - 11/01/11 10:48 PM Re: Cold piston slap, thicker oil? [Re: CBR.worm]
ammolab Offline


Registered: 01/16/06
Posts: 544
Loc: Ruidoso, NM USA
Your oil is THICKEST when cold... It the slap goes away when things warm up(oil now thinner)...how would a thicker oil help that piston slap?
Or is it the temp of the piston/parts that matters?


Edited by ammolab (11/01/11 10:49 PM)
_________________________
2009 Honda CR-V
2002 BMW M Coupe
2011 BMW R1200R
1986 BMW K75C
2005 Kaw Ninja 250
1994 Jeep Wrangler 2.5L

Top
#2422859 - 11/01/11 11:00 PM Re: Cold piston slap, thicker oil? [Re: CBR.worm]
MrRPM Offline


Registered: 08/25/11
Posts: 437
Loc: Michigan
its probably the temp of the pistons that cause that. as they get hot they expand to the proper size/shape, as they are desighned to do.

so i could maybe see how using a thicker oil at start up could help cushion the piston slap, but who knows if it actually would work.

try it!
_________________________
2001 Jeep Wrangler 4.0L, 5qts Quaker State DEFY 10w-30/1qt kendall GT-1 20w-50, FRAM XG8A (ultra)


Top
#2422905 - 11/02/11 01:39 AM Re: Cold piston slap, thicker oil? [Re: CBR.worm]
chubbs1 Offline


Registered: 06/09/10
Posts: 4574
Loc: Merritt Island FL, USA
Can you use a 0w30? M1? That is what I would try, I am another who doesn't understand how a thicker oil would stop COLD piston slap. If you decide to go thicker and it helps please let me know, I would be surprised. M1 0w30 or the thicker Syntec 0w30 should do the trick. The Former being my choice, especially since we are getting towards our cold months. I had a neighbor with cold slap and I told him to go thinner and it was gone that day. Never had that issue again.
_________________________
'12 Charger SXT
QSUD 5w30 OEM filter

'12 Charger SXT
Edge FST EP 5w30 OEM (Mine;)

'11 Hyundai Sonata GLS
QSUD 5w20 OEM Filter


Top
#2422912 - 11/02/11 02:15 AM Re: Cold piston slap, thicker oil? [Re: CBR.worm]
aquariuscsm Offline


Registered: 12/30/06
Posts: 9889
Loc: South Texas,USA
Try either a 10W40 dino or if you want synth,M1 10W40HM. I bet either of these will do the trick. I`d try the dino first. Let us know how it turns out.
_________________________
1996 Nissan 300ZX 5-speed,Arctic Pearl(#175 of 300)
Syntec 10W40/Fram Ultra
Amsoil MTG(tranny)
Amsoil 80W90 GL5(rear diff)
Mobil 1 ATF
Redline Water Wetter

Top
#2422919 - 11/02/11 02:35 AM Re: Cold piston slap, thicker oil? [Re: CBR.worm]
Merkava_4 Online   content


Registered: 01/30/07
Posts: 9345
Loc: Clovis, CA
Try some MaxLife 10W-40.

Top
#2422951 - 11/02/11 06:18 AM Re: Cold piston slap, thicker oil? [Re: CBR.worm]
SteveSRT8 Online   content


Registered: 10/10/08
Posts: 15115
Loc: Sunny Florida
As the owner of many 'slappers' I can tell you this. Get used to it. No oil is likely to help, as it's not clearances where oil is pressurized.

If it is real piston slap it will disappear very quickly, unlike a valve gear noise which can hang around a bit. On our engines it has absolutely no effect at all on the life or performance of the engine.
_________________________
"In a democracy, dissent is an act of faith."
J. William Fulbright
Best ET-12.79 @ 111 mph
4340 pounds, Street tires
Just like we go to Publix

Top
#2422963 - 11/02/11 06:50 AM Re: Cold piston slap, thicker oil? [Re: SteveSRT8]
TFB1 Offline


Registered: 09/03/10
Posts: 2622
Loc: VA
Originally Posted By: SteveSRT8
As the owner of many 'slappers' I can tell you this. Get used to it. No oil is likely to help, as it's not clearances where oil is pressurized.


There you go, in a nutshell...

I could maybe see thicker oil helping if the slap was slight but usually the only thing that stops it is piston expansion as it heats up... Piston slap is basically the piston rocking slightly in the cylinder and while it likely won't cause a issue, I'd give the engine a minute or so to get heat into the pistons before I'd drive it...

Top
#2423033 - 11/02/11 08:51 AM Re: Cold piston slap, thicker oil? [Re: SteveSRT8]
Boss302fan Offline


Registered: 11/07/09
Posts: 1951
Loc: Oconomowoc Wi
Originally Posted By: SteveSRT8
As the owner of many 'slappers' I can tell you this. Get used to it. No oil is likely to help, as it's not clearances where oil is pressurized.

If it is real piston slap it will disappear very quickly, unlike a valve gear noise which can hang around a bit. On our engines it has absolutely no effect at all on the life or performance of the engine.


Ditto.
_________________________
John P
Wisconsin
2006 Lexus LS 430
1990 Jaguar XJS V12
2011 Hyundai Santa Fe V6
Other fun cars

Top
#2423116 - 11/02/11 11:08 AM Re: Cold piston slap, thicker oil? [Re: CBR.worm]
KCJeep Offline


Registered: 06/30/11
Posts: 4608
Loc: Mahzurrah!
We have two "slappers", a 2000 Chevy 3.1 and a 2004 Chevy 3.4, both slap loudly when cold, both quite down quickly, and fooling with different oils has never made a bit of difference that I can detect.
_________________________
2004 Jeep GC WJ 4.0 @ 122k Pennzoil HM 10w30 w/MoS2
Napa Silver 31515
KIA Sedona 40k, Chevy Lumina 173k, Chrysler Sebring 171k.

Top
#2423151 - 11/02/11 12:02 PM Re: Cold piston slap, thicker oil? [Re: CBR.worm]
Bambam Offline


Registered: 12/16/03
Posts: 747
Loc: CT
How about using a block heater all the time, warmer engine less slap?
_________________________
07 DMAX CC 4x4
265 Goodyears
Bilstein 5100's
T-C pump rub fix
EGR Blocked
PCV rerouted
efi live tuned

Student of dnewton's dino teachings

Top
#2423159 - 11/02/11 12:10 PM Re: Cold piston slap, thicker oil? [Re: CBR.worm]
aquariuscsm Offline


Registered: 12/30/06
Posts: 9889
Loc: South Texas,USA
My 2nd 3000GT I owned "slapped" with thinner synths. Dino made it go away completely. Some engines just seem finicky for some reason.
_________________________
1996 Nissan 300ZX 5-speed,Arctic Pearl(#175 of 300)
Syntec 10W40/Fram Ultra
Amsoil MTG(tranny)
Amsoil 80W90 GL5(rear diff)
Mobil 1 ATF
Redline Water Wetter

Top
#2423187 - 11/02/11 12:39 PM Re: Cold piston slap, thicker oil? [Re: CBR.worm]
SteveSRT8 Online   content


Registered: 10/10/08
Posts: 15115
Loc: Sunny Florida
You very likely proved it was not piston slap at all.
_________________________
"In a democracy, dissent is an act of faith."
J. William Fulbright
Best ET-12.79 @ 111 mph
4340 pounds, Street tires
Just like we go to Publix

Top
#2423207 - 11/02/11 01:11 PM Re: Cold piston slap, thicker oil? [Re: CBR.worm]
Ken2 Online   content


Registered: 12/02/02
Posts: 6200
Loc: Washington St.
My Tundra has had a cold piston tick for the last 115,000 miles with no changes, and I'm not worried about it. Some oils damp sound better than others, but there is really no reason to be concerned about the noise that goes away when warm. The aluminum pistons expand and contract more with heat changes than the cast iron block, so they're made to be loose when cold. No problem.
_________________________
Every gun that is made, every warship launched..a theft from those who hunger and are not fed, those who are cold and not clothed.
Gen. Eisenhower


Top
Page 1 of 3 1 2 3 >