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12-04-2017, 07:08 PM
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#1
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Senior Member
Join Date: Sep 2013
Posts: 979
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Valve adjustment
I recently purchased my coach and I now understand that Catapillar recommends an initial valve adjustment at 30,000 miles and another one at 100,000 miles. My coach has 60,000 miles on it and I am not sure it even had an initial adjustment. How can I know whether or not the adjustment was done?
__________________
U.S. Army Retired, 2002 Beaver Patriot Thunder
40 Ft, CAT C12, 455 HP, 1550 Ft Lbs Torque
Towing 2019 Chevy Equinox, AWD Turbo Diesel
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12-04-2017, 07:33 PM
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#2
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Senior Member
Join Date: Jul 2014
Posts: 35,442
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Check the rocker box, cover bolts for cracks in the paint. If the paint is intact, they haven't been off.
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12-04-2017, 08:44 PM
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#3
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Senior Member
Newmar Owners Club Freightliner Owners Club
Join Date: Jun 2016
Location: Odessa, Tx.
Posts: 848
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Quote:
Originally Posted by twinboat
Check the rocker box, cover bolts for cracks in the paint. If the paint is intact, they haven't been off.
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That's an excellent suggestion that's so obvious I didn't think of it. I assumed the OP would have to adjust his valves and go from there.
Thanks for sharing your knowledge.
Is the valve cover gasket reusable?
__________________
John and Sue from W. Texas
2001 DSDP, 3126B Cat
"the Oilfield PAID me to retire, so I did" :-)
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12-04-2017, 08:47 PM
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#4
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Senior Member
Join Date: Nov 2009
Location: Warren, Oregon
Posts: 2,560
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Have your S/N in hand and call the Cat Hot Line. If it has been done at at a Cat shop they can tell you and any thing else that has been done to your motor.
1-877-777-3126
2 stroker
__________________
2006 Country Coach Inspire 360 40ft Genoa Designer Series, Samsung 197 RR
Cat C9--STEEL & COPPER Bolt Together Radiator w/ updated rubber mounting
SilverLeaf 330 Magnum 2812 PSW 2011 Ford Edge Sport-Air Force One
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12-05-2017, 06:25 AM
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#5
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Member
Join Date: Dec 2002
Location: Mead, Wa
Posts: 64
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Valve adjustment
Hello
It's not hard to check the valve adjustment yourself. If you own a feeler gauge and have a helper to pin the engine, it takes about a hour to do it. That way you know it's done.
CAT 3126B
__________________
Richard & Roxanne
Mead,WA
2008 Forest River Charleston 410FS
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12-05-2017, 03:45 PM
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#6
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Senior Member
Join Date: Sep 2013
Posts: 979
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Quote:
Originally Posted by 2 Stroker
Have your S/N in hand and call the Cat Hot Line. If it has been done at at a Cat shop they can tell you and any thing else that has been done to your motor.
1-877-777-3126
2 stroker
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Thanks, I’ll give it a shot. I looked for it but can’t seem to locate it. Where would that S/N be located on the motor?
__________________
U.S. Army Retired, 2002 Beaver Patriot Thunder
40 Ft, CAT C12, 455 HP, 1550 Ft Lbs Torque
Towing 2019 Chevy Equinox, AWD Turbo Diesel
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12-05-2017, 03:58 PM
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#7
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Senior Member
Join Date: Nov 2009
Location: Warren, Oregon
Posts: 2,560
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Quote:
Originally Posted by MO Fred
Thanks, I’ll give it a shot. I looked for it but can’t seem to locate it. Where would that S/N be located on the motor?
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Mine you open the back door and there is a white label with the S/N on it.
2 stroker
__________________
2006 Country Coach Inspire 360 40ft Genoa Designer Series, Samsung 197 RR
Cat C9--STEEL & COPPER Bolt Together Radiator w/ updated rubber mounting
SilverLeaf 330 Magnum 2812 PSW 2011 Ford Edge Sport-Air Force One
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12-06-2017, 06:51 PM
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#8
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Senior Member
Join Date: Sep 2013
Posts: 979
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Found the SN and called CAT. They have no record at all of any work ever been done on my motor. Also, finally reached the PO and he is not sure if it was ever done. So... at 60,000 miles what would you do?
__________________
U.S. Army Retired, 2002 Beaver Patriot Thunder
40 Ft, CAT C12, 455 HP, 1550 Ft Lbs Torque
Towing 2019 Chevy Equinox, AWD Turbo Diesel
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12-06-2017, 07:04 PM
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#9
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Senior Member
Join Date: May 2013
Location: Minnesota
Posts: 260
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Quote:
Originally Posted by JNSNWT
That's an excellent suggestion that's so obvious I didn't think of it. I assumed the OP would have to adjust his valves and go from there.
Thanks for sharing your knowledge.
Is the valve cover gasket reusable?
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When I worked for the KW dealer some people wanted the gaskets changed others wanted them used over We always asked if they wanted them changed if the customer wanted them reused we told them and made a note of it that if a leak was to happen it would not be covered under workmanship warr and the cost would be the customers. Alot of people used them over and had no problems but once in a while one would leak.
__________________
2005 sunseeker V-10
Retired Diesel tech Kenworth
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12-07-2017, 12:16 AM
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#10
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Senior Member
Join Date: Nov 2009
Location: Warren, Oregon
Posts: 2,560
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Quote:
Originally Posted by MO Fred
Found the SN and called CAT. They have no record at all of any work ever been done on my motor. Also, finally reached the PO and he is not sure if it was ever done. So... at 60,000 miles what would you do?
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Fred
Well if he can't remember if it has been done I would say it has never been done.
When I took mine in I removed the mirrors and track in the bedroom pulled up the floor and cleaned the motor. I used air to blow it off first then solent and a brush to get it clean. I did not want any dirt in my motor, remember there time is your $$$$
2 stroker
__________________
2006 Country Coach Inspire 360 40ft Genoa Designer Series, Samsung 197 RR
Cat C9--STEEL & COPPER Bolt Together Radiator w/ updated rubber mounting
SilverLeaf 330 Magnum 2812 PSW 2011 Ford Edge Sport-Air Force One
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12-07-2017, 07:22 AM
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#11
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Senior Member
Newmar Owners Club Freightliner Owners Club
Join Date: Jun 2016
Location: Odessa, Tx.
Posts: 848
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FKREL, that makes perfect sense to me... I'll roll the dice on mine and reuse it.
But I will give myself a generous "lifetime " warranty
Thanks for sharing your knowledge.
__________________
John and Sue from W. Texas
2001 DSDP, 3126B Cat
"the Oilfield PAID me to retire, so I did" :-)
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12-07-2017, 11:06 AM
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#12
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Senior Member
Join Date: Sep 2013
Posts: 979
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Quote:
Originally Posted by 2 Stroker
Fred
Well if he can't remember if it has been done I would say it has never been done.
When I took mine in I removed the mirrors and track in the bedroom pulled up the floor and cleaned the motor. I used air to blow it off first then solent and a brush to get it clean. I did not want any dirt in my motor, remember there time is your $$$$
2 stroker
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Thanks for your response. I called a CAT dealer closest to me and talked to the service department. They looked up my motor too and again said it has never been worked on by CAT. At 60,000 miles he said the motor should be ok but I should get the valves adjusted sometime over the next few months. He also said it is more of a MPG issue than the threat that the motor will blow up. I am currently getting 8.1 miles per gallon on my C12 455 HP and he indicated that I should be happy with that. So.... it still makes me wonder if the valves have already been adjusted. I will keep researching the past maintenance... maybe I will get lucky.
__________________
U.S. Army Retired, 2002 Beaver Patriot Thunder
40 Ft, CAT C12, 455 HP, 1550 Ft Lbs Torque
Towing 2019 Chevy Equinox, AWD Turbo Diesel
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12-07-2017, 03:52 PM
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#13
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Senior Member
Join Date: Aug 2017
Posts: 2,106
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It's quite possible the valves have never been adjusted . Valves used to go out of adjustment more on real old engines , but there is very little change on the newer engines.
__________________
1993 Tiffin Allegro Bay 32'
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12-07-2017, 03:59 PM
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#14
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Senior Member
Monaco Owners Club
Join Date: Aug 2017
Location: Orlando, Florida
Posts: 5,819
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Quote:
Originally Posted by MO Fred
I will keep researching the past maintenance... maybe I will get lucky.
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If you get lucky you save, maybe, $500 on the overhead adjustment.
If you're unlucky it could cost you $30,000 for an engine.
So:
"you've got to ask yourself one question: 'Do I feel lucky?'"?
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