2006 Ford GT Oilpump and Serpentine Belts


twobjshelbys

GT Owner
Jul 26, 2010
5,341
Las Vegas, NV
Something you may stock in the future?
Readily available, even Amazon has it.
 

GT@50

GT Owner
Dec 14, 2019
181
Issaquah
Something you may stock in the future?
I ordered one from NAPA. I think they're getting it from Grainger. I'll put it on this winter and see what happens.
 

Art138

GT Owner
Mark II Lifetime
Jan 4, 2011
403
Weston,FL
Has anyone done a video of the oil pump belt change? It’s the only pending to do on my preventive maintenance list.
 

nota4re

GT Owner
Mark IV Lifetime
Le Mans 2010 Supporter
Feb 15, 2006
3,791
Has anyone done a video of the oil pump belt change? It’s the only pending to do on my preventive maintenance list.
There's a reasonable description in the service manual regarding the tension adjustment and how to set it. In contrast to the replacement procedure in the manual, we always replace them from underneath and never go in through the interior. Once you get the cover off, use the service manual pictures and a mirror and flashlight (seriously) to familiarize yourself with the orientation of the alignment marks for proper tensioning BEFORE you remove the existing belt. The belt is tensioned via an idler pulley. We will typically remove the idler pulley completely so that the new belt can be installed without damaging the "tracks". In summary, maybe the hardest/most tedious job is getting the plastic belt cover off. However, the most important part is understanding and setting the tension correctly. Like everything else, the first time that you do this its a learning experience and after that it will be quite easy/straightforward the next time.
 
  • Like
Reactions: Art138

B.M.F.

GT Owner
Mark II Lifetime
Jan 29, 2009
1,400
Minnesota
In contrast to the opinion above, I really like the valves. Yes, they are slower so if your objective is to have a Jiffy-lube quick oil change, the valve may slow you down. In our case, the draining speed has NEVER been an issue. Under a GT with the pans off, there's plenty of items to check - belts, AC compressor, oil cooler, power steering pump, motor mounts, exhaust, starter wiring, shocks, ball joints, etc. Additionally, it is a good opportunity to clean the pebbles and other crap that has accumulated between the frame rails and pans. By the time you've done these checks and cleaning, the oil reservoir has completely drained.

I also installed and use the drain on my F350 with 10+ quarts of oil. I've never found the speed of the draining to be an issue as it allows me (typically overdue) time to make some visual inspections to insure all is good.

Different strokes for different folks.
maybe it was just because the only car i had with valve had a 3/8 hose that was 2' long..
 

GT101

*UK Support*
Supporting Vendor
Jan 20, 2010
303
Colchester, Essex, UK
Hi Dave! Collectively, have you accumulated many miles on the GTs using the Y-720 belt? I think that's going to be the go to belt for the oil pump!
We’ve fitted maybe 6 or so now - we don’t have lots of miles as most of our customers don’t drive their cars enough...
No reason to think they won’t last just as well as the OE belt though from what we have seen.
 

Dan S.

Member
Oct 7, 2020
13
I contacted Continental yesterday about the y-720 belt... was curious if there were any specs, specifically rpm and minimum sprocket diameter that might be helpful to our discussion. (Disclaimer - I don't know what the sprocket diameters are on the GT).

Their reply can be found below, their speed is noted in feet per minute; the belt is approx. 28.5" (2.375 ft) in circumference. so by my math, which could very well be wrong, at 9800 fpm it is going at about 4100 rpm. At 6500 rpm, the belt is going at over 15000 rpm which would seem to be more than "can handle well over 9800 fpm".

I have both the OEM and Y-720 in front of me. The Y-720 is about 0.020" wider and about 0.035" thicker most of which is in the belt not the teeth. Still don't know which belt I will go with when I swap them out this year...

Thoughts?

Dan

Dan,

The minimum diameter sprocket on the Y-720 is 18 teeth which is 1.80” in pitch diameter.

The max speed is dependent on the material of the sprockets.

Up to 6500 fpm rim speed (belt surface speed) = cast iron is often used in stock

Up to 9800 fpm rim speed (belt surface speed) = ductile iron is required.

Over 9800 fpm rim speed (belt surface speed) = steel is required.

The belt can handle well over 9800 fpm. Of course, the faster the belt is travelling the less life the belt will see. Also we would recommend to go as large as possible on the small sprocket and stay away from the minimum if at all possible. Going small on the sprocket will also reduce life of the belt.


Regards, Jeff
Applications Engineering
 
Last edited:
  • Like
Reactions: extrap

extrap

GT Owner
Mark II Lifetime
Jul 16, 2020
289
N Cent FL
Very much looking forward to seeing how this plays out ... not crazy at all about operating with a 15 year old belt.
 

Dan S.

Member
Oct 7, 2020
13
I'm assuming that the oil pump is running at engine rpm, which I recognize now is a really bad assumption
 

HighHP

GT Owner
Jun 3, 2019
215
Spokane, WA
Assume the belt crank sprocket is 2" in diameter.

2" x 3.14 = 6.28" sprocket circumference. So the belt travels approximately 6" or 0.5 feet per revolution. If the engine is running at 6000 RPM the belt is running at 3000 feet per minute.
 
Last edited:

Dan S.

Member
Oct 7, 2020
13
Thanks for the correction, the math seemed off - should have worked it through a couple more times before posting.

I see where I went wrong;. my math assumes a sprocket circumference of 2.375 ft, sigh... so the good news is that the belt is well within the rim speed specs given by the tech.

The bad news is that I'm going to go in a dark room and sulk for a couple days.
 

HighHP

GT Owner
Jun 3, 2019
215
Spokane, WA
No bad news. We all learned a lot from your research and sharing the specs.