Finding the Hz value for Cambelt tension
Discussion
I have a Peugeot 306 Rallye with the XU10J4RS engine (middle schematic) and I want to accurately set the tension using an OEM-ish method.
Peugeot say you should use the Gates STT-1 sonic cambelt tension tester but I don’t have access to one and annoyingly they don’t give the Hz value you’re aiming for.
I’ve seen people using simple smart phone apps to get cambelt tension on Ducatis and want to do the same to check mine.
I’ll do the usually tighten till you can twist it 45 degrees at the longest span but I want to do it this way too as it’s more scientific.
Can anyone help me find the correct Hz value for my cambelt?
Any help much appreciated!
Cheers.
Peugeot say you should use the Gates STT-1 sonic cambelt tension tester but I don’t have access to one and annoyingly they don’t give the Hz value you’re aiming for.
I’ve seen people using simple smart phone apps to get cambelt tension on Ducatis and want to do the same to check mine.
I’ll do the usually tighten till you can twist it 45 degrees at the longest span but I want to do it this way too as it’s more scientific.
Can anyone help me find the correct Hz value for my cambelt?
Any help much appreciated!
Cheers.
cavebloke said:
I have a Peugeot 306 Rallye with the XU10J4RS engine (middle schematic) and I want to accurately set the tension using an OEM-ish method.
Peugeot say you should use the Gates STT-1 sonic cambelt tension tester but I don’t have access to one and annoyingly they don’t give the Hz value you’re aiming for.
I’ve seen people using simple smart phone apps to get cambelt tension on Ducatis and want to do the same to check mine.
I’ll do the usually tighten till you can twist it 45 degrees at the longest span but I want to do it this way too as it’s more scientific.
Can anyone help me find the correct Hz value for my cambelt?
Any help much appreciated!
Cheers.
When I were a lad it was always a 90° twist on the longest run!Peugeot say you should use the Gates STT-1 sonic cambelt tension tester but I don’t have access to one and annoyingly they don’t give the Hz value you’re aiming for.
I’ve seen people using simple smart phone apps to get cambelt tension on Ducatis and want to do the same to check mine.
I’ll do the usually tighten till you can twist it 45 degrees at the longest span but I want to do it this way too as it’s more scientific.
Can anyone help me find the correct Hz value for my cambelt?
Any help much appreciated!
Cheers.
Unless you have a very good frequency measuring unit forget using apps etc. I do belt tensioning on industrial machinery on my day job using the frequency method and it works very well. I have also built a number of Peugeot engines and changed cambelts on others including XU5/9/10's 8v and 16v using the twist method. No issues. I wouldnt complicate it and also wouldnt rely on the frequency method unless you have the right tools.
I've used the Gates app on my phone when tensioning my Ducati cambelts but I prefer to use the 'old-school' methods first and then confirm with the app.
That said, it seems pretty accurate to me as long as you have a calm, peaceful environment to use it in but I'd still double-check with the twist/go-nogo/tension meter where possible.
That said, it seems pretty accurate to me as long as you have a calm, peaceful environment to use it in but I'd still double-check with the twist/go-nogo/tension meter where possible.
catso said:
I've used the Gates app on my phone when tensioning my Ducati cambelts but I prefer to use the 'old-school' methods first and then confirm with the app.
That said, it seems pretty accurate to me as long as you have a calm, peaceful environment to use it in but I'd still double-check with the twist/go-nogo/tension meter where possible.
This is what I’d like to do. Set tension by the twist method and then just validate it using the Hz value. That said, it seems pretty accurate to me as long as you have a calm, peaceful environment to use it in but I'd still double-check with the twist/go-nogo/tension meter where possible.
Sadly I can’t find the Hz value to aim for, so it doesn’t look like it will be possible.
Mikey G said:
Unless you have a very good frequency measuring unit forget using apps etc. I do belt tensioning on industrial machinery on my day job using the frequency method and it works very well. I have also built a number of Peugeot engines and changed cambelts on others including XU5/9/10's 8v and 16v using the twist method. No issues. I wouldnt complicate it and also wouldnt rely on the frequency method unless you have the right tools.
This ^ over 35 yrs on the tools never lost a belt ever after completion of this task Evoluzione said:
The 90 twist method is the stupidest thing I ever saw. I can take any correctly tensioned belt and twist it to any angle I like, it depends how much pressure I put on it.
Which is why a lot of manufacturers went the way of using spring loaded tensioners, easy to setup and repeatable, no need to fuss about with a Hz meter. The negatives though is many people forget about the spring tensioner and inadvertantly doing other maintenace like replacing a crank damper pulley turn the engine backwards causing the belt to slacken on its tensioned edge making a jumped tooth a possibility.But on older engines the twist method is a good guage, and I expect most people to be applying a medium pressure and not taking a ham fisted approach.
When i'm back in work I may investigate the accuracy of a phone app against a Hz meter but may be a while depending on what maintenance schedules fall on me.
Gassing Station | Engines & Drivetrain | Top of Page | What's New | My Stuff