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.
So I have never seen the bracket that ties the water pump into the tensioner used.
What is the application for this bracket? Pre-S4?
Would it be advantageous to trim the plastic TB cover to accommodate? would this provide more stability to the tensioner roller shaft that is incorporated on the water pump?
Inquiring minds need to know...
Last edited by firemn131; Sep 14, 2020 at 10:44 AM.
in order to use that later S4 system ,
the earlier tensioner arm assembly must also be changed ,
IDK if that would also include a different tensioner body
So I have never seen the bracket that ties the water pump into the tensioner used.
What is the application for this bracket? Pre-S4?
Would it be advantageous to trim the plastic TB cover to accommodate? would this provide more stability to the tensioner roller shaft that is incorporated on the water pump?
Inquiring minds need to know...
It changes that post in the water pump into "double shear" versus "single shear".
This started in the S4 models and continued to the end of production.
Much more stable.
Considering that pin does not see much in the way of load (other than the weight of the assembly and possibly an imbalanced vertical component from the belt tension), that upper support bracket is very important. Without it, any load the pin does see is cantilevered off the base of the pin, which creates a bending moment with increased deflection. However, the real purpose of that support is to increase stiffness, driving up its resonant frequency. So, if/when it does resonate during operation, its deflection and stress will be lower.
Very early 87 used the early water pump. There is a service bulletin showing how to notch the cover for the new pump.
(If you use a PKT you can use a less expensive early pump on any year )
Don't know why anyone would use the stock tensioner with the Porken unit out there and available. Install and done - no belt tension checks or adjustments between water pump service intervals.
Seems to me that Porsche put that roller there specifically to protect the TB teeth from getting hosed up when the TB resonates wildly at certain RPMs during operation.
Theon Goes Full Carbon Fiber With Stunning New Build
Slideshow: Built around a carbon-bodied 964 and a naturally aspirated 4.0-liter flat-six, this bespoke commission highlights how far the restomod formula has evolved.
Tuner Is Converting Porsche 911s Into Shooting Brakes
Slideshow: A Polish Porsche specialist is moving ahead with one of the most unusual 911 conversions in recent memory: a shooting brake version of the 991-generation sports car.
This Coachbuilt Creation Is A Modern Take on the Legendary Porsche 917
Slideshow: A Porsche Carrera GT has been transformed into a one-off coachbuilt machine that blends analog supercar engineering with styling inspired by the legendary 917 race cars.
Is This Convertible Cayenne A Steal, Or A Returnless Investment?
Slideshow: A heavily modified Porsche Cayenne convertible with faux wood trim and a long list of flaws recently sold at auction for surprisingly little money.
Porsche's Top 5 Most Questionable Naming Decisions
Slideshow: For a company obsessed with engineering precision, Porsche has occasionally named its cars in ways that left even loyal enthusiasts scratching their heads.
Pogea Racing's 964 Porsche 911 Reimagination Stands Out in a Crowded Field
Slideshow: Pogea Racing's latest Porsche 964 project blends carbon-fiber construction, modern chassis upgrades, and up to 500 horsepower while keeping the air-cooled 911 experience firmly analog.
)
Water pump/tensioner bracket use
