Valve Clearances
02-26-2014, 12:07 AM
#1
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Valve Clearances
I'm doing a budget refresh on a stock MSM head (BP4W and stock MSM cams). I lapped the valves and cleaned everything up. I have gaps between .007 and .0125 on the intake side and .008 and .012 on the exhaust.
What is the recommended lash on a stock head running around 15psi on a track only motor with a redline around 7,200? I should have enough shims to mix/match and get pretty balanced numbers if I can figure out what the targets are. Search results are returning crazy values from .007 to .016 and everything in between and OEM recommendations might be too tight for forced induction and track heat. Thanks!
What is the recommended lash on a stock head running around 15psi on a track only motor with a redline around 7,200? I should have enough shims to mix/match and get pretty balanced numbers if I can figure out what the targets are. Search results are returning crazy values from .007 to .016 and everything in between and OEM recommendations might be too tight for forced induction and track heat. Thanks!
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1
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02-26-2014, 08:01 AM
#4
I'm interested to know as well. When I was adjusting my valves I could find very little information online.
I did manage to dig up some part numbers, even they were tough to find.
Mazda Part Numbers and thicknesses so you can order from a dealer. They're ~$9 a piece from Rosenthal.
mm Mazda Part #
2.750 Z5Y1-12-541
2.800 Z5Y2-12-541
2.850 Z5Y3-12-541
2.900 Z5Y4-12-541
2.950 Z5Y5-12-541
3.000 Z5Y6-12-541
3.028 Z502-12-542
3.050 FP07-12-564
3.052 Z502-12-545
3.076 Z502-12-548
3.100 FP07-12-566
3.100 Z502-12-552
3.116 Z502-12-554
3.148 Z502-12-558
3.156 Z502-12-559
3.164 Z502-12-561
3.172 Z502-12-562
3.175 FP07-12-569
3.180 Z502-12-563
3.188 Z502-12-564
3.196 Z502-12-565
3.204 Z502-12-566
3.210 Z502-12-567
3.220 Z502-12-568
3.236 Z502-12-571
3.252 Z502-12-573
3.260 Z502-12-574
3.268 Z502-12-575
3.284 Z502-12-577
3.292 Z502-12-578
3.300 Z502-12-579
3.316 Z502-12-582
3.324 Z502-12-583
3.348 Z502-12-586
3.350 FP07-12-577
3.396 Z502-12-593
3.400 FP07-12-579
3.450 KJ01-12-595
3.500 KJ01-12-597
3.550 KJ01-12-599
3.600 Z5Y1-12-599
3.650 Z5Y2-12-599
3.700 Z5Y3-12-599
3.750 Z5Y4-12-599
List of compatible Nissan Shims that can be purchased from Cylinder Head Supply I bought quite a few shims from them and have been very happy with the sevice and quality/accuracy of the shims. Prices are $13.75 for 4, so they come out considerably cheaper than OEM if you need more than 1.
Nissan compatible shims
Size ----Nissan Part
2.00mm - NISK2-00
2.05mm - NISK2-05
2.10mm - NISK2-10
2.15mm - NISK2-15
2.20mm - NISK2-20
2.25mm - NISK2-25
2.30mm - NISK2-30
2.35mm - NISK2-35
2.40mm - NISK2-40
2.45mm - NISK2-45
2.50mm - NISK2-50
2.55mm - NISK2-55
2.60mm - NISK2-60
2.65mm - NISK2-65
2.70mm - NISK2-70
2.75mm - NISK2-75
2.80mm - NISK2-80
2.85mm - NISK2-85
2.90mm - NISK2-90
2.95mm - NISK2-95
3.00mm – NISK3-00
I did manage to dig up some part numbers, even they were tough to find.
Mazda Part Numbers and thicknesses so you can order from a dealer. They're ~$9 a piece from Rosenthal.
mm Mazda Part #
2.750 Z5Y1-12-541
2.800 Z5Y2-12-541
2.850 Z5Y3-12-541
2.900 Z5Y4-12-541
2.950 Z5Y5-12-541
3.000 Z5Y6-12-541
3.028 Z502-12-542
3.050 FP07-12-564
3.052 Z502-12-545
3.076 Z502-12-548
3.100 FP07-12-566
3.100 Z502-12-552
3.116 Z502-12-554
3.148 Z502-12-558
3.156 Z502-12-559
3.164 Z502-12-561
3.172 Z502-12-562
3.175 FP07-12-569
3.180 Z502-12-563
3.188 Z502-12-564
3.196 Z502-12-565
3.204 Z502-12-566
3.210 Z502-12-567
3.220 Z502-12-568
3.236 Z502-12-571
3.252 Z502-12-573
3.260 Z502-12-574
3.268 Z502-12-575
3.284 Z502-12-577
3.292 Z502-12-578
3.300 Z502-12-579
3.316 Z502-12-582
3.324 Z502-12-583
3.348 Z502-12-586
3.350 FP07-12-577
3.396 Z502-12-593
3.400 FP07-12-579
3.450 KJ01-12-595
3.500 KJ01-12-597
3.550 KJ01-12-599
3.600 Z5Y1-12-599
3.650 Z5Y2-12-599
3.700 Z5Y3-12-599
3.750 Z5Y4-12-599
List of compatible Nissan Shims that can be purchased from Cylinder Head Supply I bought quite a few shims from them and have been very happy with the sevice and quality/accuracy of the shims. Prices are $13.75 for 4, so they come out considerably cheaper than OEM if you need more than 1.
Nissan compatible shims
Size ----Nissan Part
2.00mm - NISK2-00
2.05mm - NISK2-05
2.10mm - NISK2-10
2.15mm - NISK2-15
2.20mm - NISK2-20
2.25mm - NISK2-25
2.30mm - NISK2-30
2.35mm - NISK2-35
2.40mm - NISK2-40
2.45mm - NISK2-45
2.50mm - NISK2-50
2.55mm - NISK2-55
2.60mm - NISK2-60
2.65mm - NISK2-65
2.70mm - NISK2-70
2.75mm - NISK2-75
2.80mm - NISK2-80
2.85mm - NISK2-85
2.90mm - NISK2-90
2.95mm - NISK2-95
3.00mm – NISK3-00
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1
1
02-26-2014, 10:00 AM
#6
Retired Mech Design Engr
iTrader: (3)
Join Date: Jan 2013
Location: Seneca, SC
Posts: 5,009
Total Cats: 856
18psi. The FSM does a poor job of converting from metric to imperial. If you do the conversion yourself, you arrive at Savington's numbers.
Sav: are you also recommending that this should be adhered to for N/A, street turbo, and track turbo?
Sav: are you also recommending that this should be adhered to for N/A, street turbo, and track turbo?
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0
02-26-2014, 11:23 AM
#7
Former Vendor
iTrader: (31)
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 15,442
Total Cats: 2,099
My numbers come from the 99-05 Engine-specific FSM, and they are converted from metric specs. I've used them on turbo builds as well. Trend towards the big side on the exhaust cam gaps.
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1
1
02-27-2014, 08:29 AM
#9
I'm interested to know as well. When I was adjusting my valves I could find very little information online.
I did manage to dig up some part numbers, even they were tough to find.
Mazda Part Numbers and thicknesses so you can order from a dealer. They're ~$9 a piece from Rosenthal.
mm Mazda Part #
2.750 Z5Y1-12-541
2.800 Z5Y2-12-541
2.850 Z5Y3-12-541
2.900 Z5Y4-12-541
2.950 Z5Y5-12-541
3.000 Z5Y6-12-541
3.028 Z502-12-542
3.050 FP07-12-564
3.052 Z502-12-545
3.076 Z502-12-548
3.100 FP07-12-566
3.100 Z502-12-552
3.116 Z502-12-554
3.148 Z502-12-558
3.156 Z502-12-559
3.164 Z502-12-561
3.172 Z502-12-562
3.175 FP07-12-569
3.180 Z502-12-563
3.188 Z502-12-564
3.196 Z502-12-565
3.204 Z502-12-566
3.210 Z502-12-567
3.220 Z502-12-568
3.236 Z502-12-571
3.252 Z502-12-573
3.260 Z502-12-574
3.268 Z502-12-575
3.284 Z502-12-577
3.292 Z502-12-578
3.300 Z502-12-579
3.316 Z502-12-582
3.324 Z502-12-583
3.348 Z502-12-586
3.350 FP07-12-577
3.396 Z502-12-593
3.400 FP07-12-579
3.450 KJ01-12-595
3.500 KJ01-12-597
3.550 KJ01-12-599
3.600 Z5Y1-12-599
3.650 Z5Y2-12-599
3.700 Z5Y3-12-599
3.750 Z5Y4-12-599
List of compatible Nissan Shims that can be purchased from Cylinder Head Supply I bought quite a few shims from them and have been very happy with the sevice and quality/accuracy of the shims. Prices are $13.75 for 4, so they come out considerably cheaper than OEM if you need more than 1.
Nissan compatible shims
Size ----Nissan Part
2.00mm - NISK2-00
2.05mm - NISK2-05
2.10mm - NISK2-10
2.15mm - NISK2-15
2.20mm - NISK2-20
2.25mm - NISK2-25
2.30mm - NISK2-30
2.35mm - NISK2-35
2.40mm - NISK2-40
2.45mm - NISK2-45
2.50mm - NISK2-50
2.55mm - NISK2-55
2.60mm - NISK2-60
2.65mm - NISK2-65
2.70mm - NISK2-70
2.75mm - NISK2-75
2.80mm - NISK2-80
2.85mm - NISK2-85
2.90mm - NISK2-90
2.95mm - NISK2-95
3.00mm – NISK3-00
I did manage to dig up some part numbers, even they were tough to find.
Mazda Part Numbers and thicknesses so you can order from a dealer. They're ~$9 a piece from Rosenthal.
mm Mazda Part #
2.750 Z5Y1-12-541
2.800 Z5Y2-12-541
2.850 Z5Y3-12-541
2.900 Z5Y4-12-541
2.950 Z5Y5-12-541
3.000 Z5Y6-12-541
3.028 Z502-12-542
3.050 FP07-12-564
3.052 Z502-12-545
3.076 Z502-12-548
3.100 FP07-12-566
3.100 Z502-12-552
3.116 Z502-12-554
3.148 Z502-12-558
3.156 Z502-12-559
3.164 Z502-12-561
3.172 Z502-12-562
3.175 FP07-12-569
3.180 Z502-12-563
3.188 Z502-12-564
3.196 Z502-12-565
3.204 Z502-12-566
3.210 Z502-12-567
3.220 Z502-12-568
3.236 Z502-12-571
3.252 Z502-12-573
3.260 Z502-12-574
3.268 Z502-12-575
3.284 Z502-12-577
3.292 Z502-12-578
3.300 Z502-12-579
3.316 Z502-12-582
3.324 Z502-12-583
3.348 Z502-12-586
3.350 FP07-12-577
3.396 Z502-12-593
3.400 FP07-12-579
3.450 KJ01-12-595
3.500 KJ01-12-597
3.550 KJ01-12-599
3.600 Z5Y1-12-599
3.650 Z5Y2-12-599
3.700 Z5Y3-12-599
3.750 Z5Y4-12-599
List of compatible Nissan Shims that can be purchased from Cylinder Head Supply I bought quite a few shims from them and have been very happy with the sevice and quality/accuracy of the shims. Prices are $13.75 for 4, so they come out considerably cheaper than OEM if you need more than 1.
Nissan compatible shims
Size ----Nissan Part
2.00mm - NISK2-00
2.05mm - NISK2-05
2.10mm - NISK2-10
2.15mm - NISK2-15
2.20mm - NISK2-20
2.25mm - NISK2-25
2.30mm - NISK2-30
2.35mm - NISK2-35
2.40mm - NISK2-40
2.45mm - NISK2-45
2.50mm - NISK2-50
2.55mm - NISK2-55
2.60mm - NISK2-60
2.65mm - NISK2-65
2.70mm - NISK2-70
2.75mm - NISK2-75
2.80mm - NISK2-80
2.85mm - NISK2-85
2.90mm - NISK2-90
2.95mm - NISK2-95
3.00mm – NISK3-00
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0
02-27-2014, 11:18 PM
#10
Senior Member
Thread Starter
iTrader: (4)
Join Date: Jul 2009
Location: Seattle
Posts: 798
Total Cats: 24
I had my head's 16 shims and 18 spares and was able to get the intake completely square with different combinations. I ordered 5 shims from MMD to complete the exhaust side and of those, I only found one size discontinued. Two of the five were backordered so hopefully they arrive sometime soon... ...like before April! 
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0
0
02-28-2014, 07:26 AM
#11
Pardon my ignorance, but who is MMD?
I went my local dealer because only 1 of the 4 shim sizes I wanted was on Rosenthal. The local dealer only had the same shim available, and his parts system was telling me that out of the 3, only 1 was in British Columbia, and there were none of the others in North America. I inferred from this that perhaps they had consolidated the number of shims they made. I was able to get the last valve into spec by playing with the tolerances and selecting a different shim.
I went my local dealer because only 1 of the 4 shim sizes I wanted was on Rosenthal. The local dealer only had the same shim available, and his parts system was telling me that out of the 3, only 1 was in British Columbia, and there were none of the others in North America. I inferred from this that perhaps they had consolidated the number of shims they made. I was able to get the last valve into spec by playing with the tolerances and selecting a different shim.
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0
0
02-28-2014, 09:43 AM
#13
Pardon my ignorance, but who is MMD?
I went my local dealer because only 1 of the 4 shim sizes I wanted was on Rosenthal. The local dealer only had the same shim available, and his parts system was telling me that out of the 3, only 1 was in British Columbia, and there were none of the others in North America. I inferred from this that perhaps they had consolidated the number of shims they made. I was able to get the last valve into spec by playing with the tolerances and selecting a different shim.
I went my local dealer because only 1 of the 4 shim sizes I wanted was on Rosenthal. The local dealer only had the same shim available, and his parts system was telling me that out of the 3, only 1 was in British Columbia, and there were none of the others in North America. I inferred from this that perhaps they had consolidated the number of shims they made. I was able to get the last valve into spec by playing with the tolerances and selecting a different shim.
MAZDASPEED MOTORSPORTS DEVELOPMENT - Home Page
put the new cam in, check the clearance, get new shims for ones that are out of spec. I wouldn't bother with any of the others.
Last edited by Seefo; 02-28-2014 at 02:05 PM.
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