When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I suspect that the tensioner part # 8W93-6K254-CA is for the Tsubaki chain system, not the INA. The jaguar part # for the Tsubaki tensioner is AJ811487, and doesn't have any supersessions. Web searches on these part numbers don't yield anything conclusive. It's possible that the engine you show in the pics above with the 8W93-6K254-CA tensioners, somehow had the Tusbaki tensioners with the INA chain system.
The bolt positions changed with the 3rd and latest tensioner design. So first and second designs were the same bolt pattern but different plungers and the third changed to give it more of an angle and thus improved mechanical advantage against the new guide which has the steel button. The closer to the fulcrum of the guide, the more movement can be achieved although this does reduce the force that gets applied. Its many years since I learned about the physics and terminology but I think you can make out my fumbling for the correct words.
Furthermore you can see the steel button on the guide in your first photo in your previous post but the plunger does not press against it due to the old bolt pattern.
I rotated the images to get them all at approximately the same angle.
1. Original INA with original tensioner and guide,
2. Intermediate INA tensioner but with the latest steel button guide. (obviously fitted in error during a previous job)
3. Latest INA with latest tensioner and guide.
I rotated the images to get them all at approximately the same angle.
1. Original INA with original tensioner and guide,
2. Intermediate INA tensioner but with the latest steel button guide. (obviously fitted in error during a previous job)
3. Latest INA with latest tensioner and guide.
Interesting and thanks. Why do you think the second picture shows an interim design tensioner when it has the same part number as the one in the top picture?
Last edited by kansanbrit; 06-30-2023 at 11:11 AM.
Interesting and thanks. Why do you think the second picture shows an interim design tensioner when it has the same part number as the one in the top picture?
You are right. I got myself confused - it is the original.
So basically the tensioner changed at the same time as the guide changed. I hadn't realized that but it makes perfect sense. And the dirty engine photo in the middle shows it had been fitted with new guides but with old tensioners.
Last edited by kansanbrit; 06-30-2023 at 01:03 PM.
Hi, I understand this thread is old but I can shed a little bit of light about the interim tensioner deisgn, for XFR for instance, this is what my car has, INA chain, with new slider with the aluminium insert, but tensioner finishing in AA. You can see the VIN numbers from and to. So after that VIN number, the new tensioner was installed (CA I assume)
06-29-2023 | 11:47 AM
