Joined
·
6,063 Posts
2007 Exec 24,000 miles / 38,624 kilometers
Imagine my surprise when I go to check my valve tappet clearances today for the first time and find that all 8 valves are either out of spec or at the very limits.
Tappet clearance:
Standard: IN..: 0.10 - 0.20 mm mine> 0.10 mm
EX.: 0.20 - 0.30 mm mine> 0.19 mm
In my time updating the BKB (hasn't been updated in ~3 years) the vast majority of people didn't need to adjust their valves. Those that did either had to do a few, or all of the intake, or all of the exhaust. Not all 8. So this has me concerned.
I have TheDarkCutlass (who has more experience with this) coming over tomorrow to double check behind me on this. So this will be updated if he finds something different.
I checked and rechecked I had all of the proper alignments. I even turned the crankshaft and checked all of the valves 2-3 times with various methods. What I did find was a large discrepancy between the two sets of new feeler gauges I had.
-First was an Autocraft from Advance Auto Parts. The smallest gauges was 0.102 mm and would not fit any ANY of the valves, even the exhaust side that I later measured to be a lot larger!
-Second, I went and bought a set, the brand was "OEM" from Pep Boys. The smallest was 0.04 mm and this is what I based my measurements on.
I have no idea why the 0.1 gauge on the Autocraft will not fit anywhere, but the 0.1 gauge from OEM will. I also have no idea why when I measured with the OEM gauge that I could fit a 0.10 and a 0.09 gauge together to get the 0.19 clearance on the exhausts, but when I tried using a 1.5 and a 0.04 together they did not fit.
Regardless, both feeler gauges show that all of the valves are too tight. This is baffling to me since the time when I was most active on here, I never encountered anyone with this problem.
My current plan is to get my measurements double checked, then I'll buy shims that will take the clearance up to the max spec.
Imagine my surprise when I go to check my valve tappet clearances today for the first time and find that all 8 valves are either out of spec or at the very limits.
Tappet clearance:
Standard: IN..: 0.10 - 0.20 mm mine> 0.10 mm
EX.: 0.20 - 0.30 mm mine> 0.19 mm
In my time updating the BKB (hasn't been updated in ~3 years) the vast majority of people didn't need to adjust their valves. Those that did either had to do a few, or all of the intake, or all of the exhaust. Not all 8. So this has me concerned.
I have TheDarkCutlass (who has more experience with this) coming over tomorrow to double check behind me on this. So this will be updated if he finds something different.
I checked and rechecked I had all of the proper alignments. I even turned the crankshaft and checked all of the valves 2-3 times with various methods. What I did find was a large discrepancy between the two sets of new feeler gauges I had.
-First was an Autocraft from Advance Auto Parts. The smallest gauges was 0.102 mm and would not fit any ANY of the valves, even the exhaust side that I later measured to be a lot larger!
-Second, I went and bought a set, the brand was "OEM" from Pep Boys. The smallest was 0.04 mm and this is what I based my measurements on.
I have no idea why the 0.1 gauge on the Autocraft will not fit anywhere, but the 0.1 gauge from OEM will. I also have no idea why when I measured with the OEM gauge that I could fit a 0.10 and a 0.09 gauge together to get the 0.19 clearance on the exhausts, but when I tried using a 1.5 and a 0.04 together they did not fit.
Regardless, both feeler gauges show that all of the valves are too tight. This is baffling to me since the time when I was most active on here, I never encountered anyone with this problem.
My current plan is to get my measurements double checked, then I'll buy shims that will take the clearance up to the max spec.