Z1 valve clearance check - ArcticChat.com - Arctic Cat Forum

4 Strokes Z1 Turbo / Z1 / T660

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post #1 of 56 Old 03-17-2009, 08:12 PM Thread Starter
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Garage
Sled: 12 F1100 /78 Cheetah/88 elTigre 6000
10-11 Mileage: 1,800
09-10 Mileage: 2,200
08-09 Mileage: 3,000
07-08 Mileage: 2,150
06-07 Mileage: 2,600
ATV: 2007 h-d road king
2010 Mileage: 3,300
2009 Mileage: 3,600
2007 Mileage: 800
2006 Mileage: 2,400
I'm probably done riding for the year, so I figured I'd check my valve clearance on the Z1, after the recommended 5,000 mile interval. All in all, not too far off. The outer exhaust valves were perfect, the inner ones, were a few thousandths tighter than the minimum spec. On the intake side, they were all in spec, but both valves on the mag side were close to the minimum spec.
When I have a high and low spec., I like to set it right in the middle, so I'll re-set the 2 intake valves, as well as the 2 exhaust ones. I ordered the necessary shims, and will re-assemble later this week. The camshafts need to be removed to change the shims, so I wouldn't recommend the average person tackle this job, unless you're comfortable with taking apart the top end of a double overhead cam engine.
I would assume that most of the clearance change would be over the first 5,000 miles, and I doubt that it would change much from here on out, but I'll check them again after 10,000 and see.
I know there are some Z1s out there with over 10k on them. Anybody with any valve stories?

*previous sleds:
68 olympique
73 tnt silver bullet 294
73 tnt silver bullet 340
80 el tigre 6000
86 pantera
88 wildcat
90 ext
93 ext
95 cougar
97 xlt ltd
02 zl 500
01 z370
03 zr800efi
07 Z1EB
*current sleds:
12 F1100 Retro
78 cheetah 5000
88 el tigre 6000
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post #2 of 56 Old 03-18-2009, 09:42 AM
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Sled: 06 T660 T.T
10-11 Mileage: 1000
09-10 Mileage: 700
08-09 Mileage: 1200
07-08 Mileage: 600
<div class='quotetop'>QUOTE (captainruss99 @ Mar 17 2009, 08:12 PM) <{POST_SNAPBACK}></div>
Quote:
I'm probably done riding for the year, so I figured I'd check my valve clearance on the Z1, after the recommended 5,000 mile interval. All in all, not too far off. The outer exhaust valves were perfect, the inner ones, were a few thousandths tighter than the minimum spec. On the intake side, they were all in spec, but both valves on the mag side were close to the minimum spec.
When I have a high and low spec., I like to set it right in the middle, so I'll re-set the 2 intake valves, as well as the 2 exhaust ones. I ordered the necessary shims, and will re-assemble later this week. The camshafts need to be removed to change the shims, so I wouldn't recommend the average person tackle this job, unless you're comfortable with taking apart the top end of a double overhead cam engine.
I would assume that most of the clearance change would be over the first 5,000 miles, and I doubt that it would change much from here on out, but I'll check them again after 10,000 and see.
I know there are some Z1s out there with over 10k on them. Anybody with any valve stories? [/b]
Captain , Do you have a service manual for your Z1 ?
The reason I'm asking is, earlier this year i recieved the letter from cat saying to do valve inspections on my T660turbo at 3500 mile intervals , but in my service manual it states the recomended interval
is 7000 miles .. Just wondering if yours was contradictory as well ..

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post #3 of 56 Old 03-18-2009, 08:29 PM Thread Starter
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Join Date: Jan 2006
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Garage
Sled: 12 F1100 /78 Cheetah/88 elTigre 6000
10-11 Mileage: 1,800
09-10 Mileage: 2,200
08-09 Mileage: 3,000
07-08 Mileage: 2,150
06-07 Mileage: 2,600
ATV: 2007 h-d road king
2010 Mileage: 3,300
2009 Mileage: 3,600
2007 Mileage: 800
2006 Mileage: 2,400
I also got the letter from Cat. I would guess that the feedback they were getting in the field, made them re-think their mileage numbers. I guess if I had a 660 with over that kind of mileage, I'd have it checked during the off season. I really believe that after the initial check and re-set of the valves, that it would take much longer to lose adjustment after that.
These overhead cam engines tend to lose valve clearance as the miles add up, not like the old car engines, where they would loosen up and clatter. Valves too tight will tend to suck up into the head, and usually the exhaust valves will go first, due to the extreme heat.
All this being said, one of my riding buds, didn't check his 05 ST660 till almost 10,000 miles, and his exhaust valves were very tight, and started pulling into the head, slightly. He re-set them as they were, and ran over 8,000 miles more, with no problems, though he did check them again. I wouldn't wait that long, but it shows that every 3,500 might be a bit too much.

*previous sleds:
68 olympique
73 tnt silver bullet 294
73 tnt silver bullet 340
80 el tigre 6000
86 pantera
88 wildcat
90 ext
93 ext
95 cougar
97 xlt ltd
02 zl 500
01 z370
03 zr800efi
07 Z1EB
*current sleds:
12 F1100 Retro
78 cheetah 5000
88 el tigre 6000
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post #4 of 56 Old 03-18-2009, 10:34 PM
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Sled: 04 660 Turbo Touring
10-11 Mileage:
09-10 Mileage: 1300
08-09 Mileage: 1800
07-08 Mileage: 2000
06-07 Mileage: 1600
Interesting posts, I have a 04 660 Turbo touring and have 7300 miles without any problems so far. I have checked my manual and found no mention of checking valve clearance and have not received any notice advicing that the valves should be checked. IF anybody can scan and post or send a copy of the letter I would appreciate reading the letter and reviewing with the AC dealer. I feel this would be better posted in another thread, but it was this thread the subject was visited. Again, I really like the info shared on this site. Actually, I follow posts and have read about some of the problems encountered with the 660 Turbos such as valves clearance, overheating, battery failure and drive shaft bearings. I only hope I have not jinxed myself because so far I have not had any problems but with the miles adding up, I am now thinking it is about time to to do some preventative maintenance.
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post #5 of 56 Old 03-19-2009, 05:26 AM Thread Starter
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Posts: 939
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Garage
Sled: 12 F1100 /78 Cheetah/88 elTigre 6000
10-11 Mileage: 1,800
09-10 Mileage: 2,200
08-09 Mileage: 3,000
07-08 Mileage: 2,150
06-07 Mileage: 2,600
ATV: 2007 h-d road king
2010 Mileage: 3,300
2009 Mileage: 3,600
2007 Mileage: 800
2006 Mileage: 2,400
I don't believe I have a copy of it, but I'll look. It did say 3,500 for the 660 & 5,000 for the Z1. With your miles, I'd do it though. As far as the 660 goes, I found it to be very durable. Like I said, over 18,000 miles on the sled, with very few issues, and all minor ones at that.

*previous sleds:
68 olympique
73 tnt silver bullet 294
73 tnt silver bullet 340
80 el tigre 6000
86 pantera
88 wildcat
90 ext
93 ext
95 cougar
97 xlt ltd
02 zl 500
01 z370
03 zr800efi
07 Z1EB
*current sleds:
12 F1100 Retro
78 cheetah 5000
88 el tigre 6000
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post #6 of 56 Old 03-19-2009, 11:48 AM
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Sled: 06 T660 T.T
10-11 Mileage: 1000
09-10 Mileage: 700
08-09 Mileage: 1200
07-08 Mileage: 600
<div class='quotetop'>QUOTE (r schwenz @ Mar 18 2009, 10:34 PM) <{POST_SNAPBACK}></div>
Quote:
Interesting posts, I have a 04 660 Turbo touring and have 7300 miles without any problems so far. I have checked my manual and found no mention of checking valve clearance and have not received any notice advicing that the valves should be checked. IF anybody can scan and post or send a copy of the letter I would appreciate reading the letter and reviewing with the AC dealer. I feel this would be better posted in another thread, but it was this thread the subject was visited. Again, I really like the info shared on this site. Actually, I follow posts and have read about some of the problems encountered with the 660 Turbos such as valves clearance, overheating, battery failure and drive shaft bearings. I only hope I have not jinxed myself because so far I have not had any problems but with the miles adding up, I am now thinking it is about time to to do some preventative maintenance.[/b]
The A/C letter suggests 3500 mi and the 06 T660 turbo service manual suggests to check the valve clearance at 7000 mi .
the service manual also suggests getting the dealer to re-parallel the drive clutch/ driven pully and adjust the belt deflection after the first 100 mi ( this also is not in the owners manual ) because the engine mounts tend to move " take a set " and throw out the system . It actually states the dealer should "stress to the customer the importance of adjusting after 100 mi " Then the book goes on to explain that if the drive clutch / driven pully and belt deflection are not correct , it can lead to overheating , premature belt wear and premature bearing failure ..
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post #7 of 56 Old 03-19-2009, 12:38 PM
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Location: Sartell, mn
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Sled: 04 660 Turbo Touring
10-11 Mileage:
09-10 Mileage: 1300
08-09 Mileage: 1800
07-08 Mileage: 2000
06-07 Mileage: 1600
thank you guys for the good info!!! I am going to take my 660 in to have the valve clearance checked by dealer. I know I have been lucky so far from reading other problems encountered or some of the problems were addressed before I purchased the machine--- it was an AC employee sled for its first season, then I bought it. I have had no drive shaft bearing problems, on the 2nd belt only because I notched the first one, no overheating problems although I added a temp gauge rather wait for lights to flash, still have the original battery. But rather than live on luck I plan to take do the PM. I am curioius though with 18,000 miles what PM was carried out on the sled---- I would follow your PM schedule!
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post #8 of 56 Old 03-19-2009, 04:09 PM
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Sled: 2003f7-2004sabrecat600
Have 2 07 Z1'S and had the valves done around 7300 and 7500 miles in january. One sled was out of spec on the ex valves but hadn't run tight yet. The second sled had run 2 ex valves tight and may have burned the seats. We have now almost 9500 on each appear to be fine. Be careful though we did have some problem w/the valve cover gasket on both. The 4 shoulder bolts do not seat the gasket easily and one sled had to be resealed w/permatex as well as the new gasket. The other sled had a new gasket also and 1600 miles later the gasket split and spewed oil all over. Both sleds went through about 1 qt each in 25 miles when it happened. The first one was mine and i had to go back to pick it up w/a truck. The second was my wife's and luckily we were about 15 miles from the servicing dealer and they rolled her in the shop and went right to work and had us uot the door in 2 1/2hours. Great service. After 1600 it wasn't thier fault it broke.
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post #9 of 56 Old 03-19-2009, 06:40 PM
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Sled: Z1TurboLXR LE,& 400hp Z1Turbo ext
10-11 Mileage: 3750
09-10 Mileage: 2667
08-09 Mileage: 2580
07-08 Mileage: 2600
06-07 Mileage: 3200
What is the clearance suppose to be on the '07 Z1?
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post #10 of 56 Old 03-19-2009, 08:19 PM Thread Starter
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Join Date: Jan 2006
Location: lewiston, maine
Posts: 939
Thanks: 13
Thanked 61 Times in 56 Posts
Garage
Sled: 12 F1100 /78 Cheetah/88 elTigre 6000
10-11 Mileage: 1,800
09-10 Mileage: 2,200
08-09 Mileage: 3,000
07-08 Mileage: 2,150
06-07 Mileage: 2,600
ATV: 2007 h-d road king
2010 Mileage: 3,300
2009 Mileage: 3,600
2007 Mileage: 800
2006 Mileage: 2,400
07 Z1 Intake spec: 0.0039 to 0.0078" (0.10 to 0.20 mm)
Exhaust: 0.0078 to 0.0118" (0.20 to 0.30 mm)
There is a chart, where you take the out of spec clearance measurement, check the number of your valve shim, and it will tell you what new shim you'll need to get the desired clearance.
My exhaust shims were 285's, but I now need 280's to get the clearance right.

*previous sleds:
68 olympique
73 tnt silver bullet 294
73 tnt silver bullet 340
80 el tigre 6000
86 pantera
88 wildcat
90 ext
93 ext
95 cougar
97 xlt ltd
02 zl 500
01 z370
03 zr800efi
07 Z1EB
*current sleds:
12 F1100 Retro
78 cheetah 5000
88 el tigre 6000
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