Recent Topics
Replaced halogen headlight with LED
by gman2304
22 minutes 9 seconds ago
Web Archive
by Duffyjr
Today at 10:25 AM
Sonoma This weekend!
by racin4ds
Today at 10:22 AM
low water pressure on new kitchen faucet
by Joe1
Today at 09:40 AM
Flashing third tail light
by Brigadier
Today at 08:59 AM
Intermittent AC Cooling
by Gebo
Today at 08:59 AM
Who includes full size spare in tire rotation?
by Parlay_Slow
Today at 08:45 AM
Crude and foul behavior
by mjoekingz28
Today at 08:31 AM
Best Off The Shelf Car Wash Liquid ?
by ChrisD46
Today at 08:30 AM
Wrecking Yards
by Snagglefoot
Today at 08:26 AM
F1 - 2018 French Grand Prix
by gofast182
Today at 08:14 AM
AAP 25% Off
by Egg_Head
Today at 06:03 AM
GM Ecotec 2.4 - Cracked Exhaust Manifold
by The Critic
Today at 05:05 AM
Half Price - Shell Helix HX7, Castrol Edge and GTX
by SR5
Today at 03:59 AM
Why hang your bicycle from the ceiling?
by mjoekingz28
Today at 03:47 AM
Oil For High Sustained RPM on BMW S52
by ZEK
Yesterday at 10:41 PM
Chevy brought the blazer back
by WiskyBadger
Yesterday at 10:07 PM
LC20 and uses in modern motor oil
by synman
Yesterday at 10:01 PM
Full Synthetic CJ-4 or > 5W-30 or 10W-30
by LeTempt
Yesterday at 09:57 PM
2018 RAM 1500 EcoDiesel
by OVERKILL
Yesterday at 08:37 PM
Newest Members
Fatbrowndog0822, DRNJR, ZEK, Dudewayne, kmdz
65294 Registered Users
Who's Online
72 registered (2012AccentSE, 4WD, bdcardinal, asiancivicmaniac, Al, 4 invisible), 1484 Guests and 37 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
65294 Members
67 Forums
285764 Topics
4769197 Posts

Max Online: 3590 @ 01/24/17 08:07 PM
Donate to BITOG
Topic Options
#4586246 - 11/27/17 03:07 AM Camshaft Profile Question
George7941 Offline


Registered: 05/10/05
Posts: 2158
Loc: Toronto, Canada
I did a valve clearance adjustment on a Caterpillar C7 inline 6 truck engine. Firing order is 153624. I thought I had the engine at TDC at the end of the exhaust stroke for cyl 1 to adjust 1I&E, 2I, 3E, 4I and 5E. I found out later that I had not turned the engine over enough, the engine was only half way through its exhaust stroke and I was off by 90 deg/quarter turn. Similar situation for the second half of the valve adjustment when I thought I had TDC for cyl 6.

Do I need to pull the valve cover off again and recheck? Engine sounds normal now with no clatter indicating excessive lash.
_________________________
2006 GMC Sierra 4.3l, NV3500,G80 , Mobil 1 5W30, Dexcool.
1987 BMW R80 - sold
2015 Honda CBR300R

Staying out of the right lane a lot.

Top
#4586250 - 11/27/17 03:17 AM Re: Camshaft Profile Question [Re: George7941]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
Originally Posted By: George7941
the engine was only half way through its exhaust stroke


You might be fine, butt he ONLY way to be sure is check the valve lash again.

Trust, but verify.
_________________________
"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

Top
#4586261 - 11/27/17 04:24 AM Re: Camshaft Profile Question [Re: George7941]
Silk Offline


Registered: 07/26/03
Posts: 4562
Loc: New Zealand
Setting valves by the TDC method is too troublesome - set them on the back of the cam...so when No6 inlet is wide open, set No1 inlet, and so on. You can still set 2 valves at once because there will always be another valve nearly fully open. If you get confused, mark each valve you set.
_________________________
1987 BMW R65 - Penrite V Twin 20/50
2005 Nissan Expert - Gulf Western 10W-40
1996 Volvo T5 - Penrite HPR15 - 15W-60. Ryco syntec filter.

Top
#4586320 - 11/27/17 07:23 AM Re: Camshaft Profile Question [Re: George7941]
FlyNavyP3 Offline


Registered: 07/04/16
Posts: 1407
Loc: Jacksonville, FL
I would absolutely 're check the lash.

I learned how to lash valves quickly and easily from a friend who used to crew a fuel funny car. The method works on any 4 cycle engine.

Start on cylinder #1 rotate the engine until the exhaust valve just starts to open, once the exhaust valve just starts to open, adjust the intake valve on the same cylinder.

Continue to rotate the engine over, once the intake valve has fully opened and just starts to close, adjust the exhaust valve on that cylinder.

Now cylinder #1 is done.

Repeat process for the remaining 5 cylinders.

The beauty of this method is that it works regardless of firing order and you can start on any cylinder. It's how I've lashed valves for at least 20 years now.
_________________________
Luke
P-3C and P-8A Maritime Weapons and Tactics Instructor, Instructor Tactical Coordinator and Mission Commander

Top
#4586492 - 11/27/17 11:12 AM Re: Camshaft Profile Question [Re: George7941]
andyd Offline


Registered: 09/25/04
Posts: 7151
Loc: Marshfield , MA
Re- check. It isn't the noisy ones that burn.
_________________________
'16 Camry LE STP synth 0w20 and STP filter. the Fridge

1994 Ranger ,the Rat, 5w30 dino, STP filter

'16 Camry SE, Valvoline HM 0w20 and OEM filter
Thick oil is better grin2

Top
#4586649 - 11/27/17 02:01 PM Re: Camshaft Profile Question [Re: FlyNavyP3]
Silk Offline


Registered: 07/26/03
Posts: 4562
Loc: New Zealand
Originally Posted By: FlyNavyP3

Start on cylinder #1 rotate the engine until the exhaust valve just starts to open, once the exhaust valve just starts to open, adjust the intake valve on the same cylinder.

Continue to rotate the engine over, once the intake valve has fully opened and just starts to close, adjust the exhaust valve on that cylinder.


That's how I do single cyls, if I can't see the cam itself. But apart from triples and V twins, multi cyl engines will have one cyl 360 degrees firing from another cyl, so these ones are easy to do with the valve opening method - just so much easier to flick the engine over on the starter, see a valve fully open and adjust it's opposite number.
_________________________
1987 BMW R65 - Penrite V Twin 20/50
2005 Nissan Expert - Gulf Western 10W-40
1996 Volvo T5 - Penrite HPR15 - 15W-60. Ryco syntec filter.

Top
#4586768 - 11/27/17 03:48 PM Re: Camshaft Profile Question [Re: Silk]
CR94 Offline


Registered: 03/20/16
Posts: 1120
Loc: Western S.C. since 1996
Originally Posted By: Silk
... But apart from triples and V twins, multi cyl engines will have one cyl 360 degrees firing from another cyl, so these ones are easy to do with the valve opening method -...
Apart from 5-cylinder engines, too.
_________________________
2011 Toyota Prius now at 88K
1981 Mazda GLC (323) retired at 606K
1972 Subaru DL retired at 190K
1954 Chevrolet retired at 121K

Top
#4586830 - 11/27/17 05:29 PM Re: Camshaft Profile Question [Re: George7941]
Silk Offline


Registered: 07/26/03
Posts: 4562
Loc: New Zealand
7, 9, 11.....
_________________________
1987 BMW R65 - Penrite V Twin 20/50
2005 Nissan Expert - Gulf Western 10W-40
1996 Volvo T5 - Penrite HPR15 - 15W-60. Ryco syntec filter.

Top
#4586964 - 11/27/17 07:43 PM Re: Camshaft Profile Question [Re: andyd]
George7941 Offline


Registered: 05/10/05
Posts: 2158
Loc: Toronto, Canada
Thanks for all the feedback. I will recheck valve lash.

Originally Posted By: andyd
Re- check. It isn't the noisy ones that burn.

No risk of burning from my error. There is a possibility of excessive lash, no risk at all of insufficient lash.
_________________________
2006 GMC Sierra 4.3l, NV3500,G80 , Mobil 1 5W30, Dexcool.
1987 BMW R80 - sold
2015 Honda CBR300R

Staying out of the right lane a lot.

Top
#4587114 - 11/27/17 10:56 PM Re: Camshaft Profile Question [Re: George7941]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
I have always used charts very similar to this one:
_________________________
"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

Top
#4587164 - 11/28/17 02:42 AM Re: Camshaft Profile Question [Re: Linctex]
George7941 Offline


Registered: 05/10/05
Posts: 2158
Loc: Toronto, Canada
Oops! I made a mistake in my original post. It should have been "I thought I had the engine at TDC at the end of the COMPRESSION stroke for cyl 1---".

Linctex's chart shows the exact way I did it.
_________________________
2006 GMC Sierra 4.3l, NV3500,G80 , Mobil 1 5W30, Dexcool.
1987 BMW R80 - sold
2015 Honda CBR300R

Staying out of the right lane a lot.

Top