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Discussion Starter #1
I just had a new timing belt and water pump installed @ the dealer ( bout 2 months ago). Since I got it back it seems as though the RPM's on the Tach dont go over 2100 too often..even doing 70 mph.
I also noticed a BIG loss in MPG's. i use to get about 420- 440 mpg depending on my driving, I looked after a ful tank @ the trip odometer and saw I only got 286 and 329 on my last two fill ups...is it possible they put the timing belt in wrong??

anyone have any ideas before i go down there and ask them..cause you KNOW that they will tell me the truth...yeah right!!

anyone..anyone....????
 

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Discussion Starter #2
are there any Techs on here that could shed some light on this?? even a yes or no answer would be a place to start..
 

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There isnt but one way to install a "belt",timeing chains are a different animal.Ive never cracked a Toyo motor so I really cant say what all is connected and or how its all connected in there ?
 

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I just had a new timing belt and water pump installed @ the dealer ( bout 2 months ago). Since I got it back it seems as though the RPM's on the Tach dont go over 2100 too often..even doing 70 mph.
I also noticed a BIG loss in MPG's. i use to get about 420- 440 mpg depending on my driving, I looked after a ful tank @ the trip odometer and saw I only got 286 and 329 on my last two fill ups...is it possible they put the timing belt in wrong??

anyone have any ideas before i go down there and ask them..cause you KNOW that they will tell me the truth...yeah right!!

anyone..anyone....????
Yes they can, and you are posting in the wrong section, this is for 2007 and up.
 

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Yes they can, and you are posting in the wrong section, this is for 2007 and up.


4.7 liter vvti iforce v8 is the same engine used on the 2007 Tundra.He may have posted on wrong topic but Engine is still the same maybe someone could help with the topic since the engine is shared on all Tundra's..

5.7 liter have a chain your lucky Mxsju you dont ever have to deal with this Pricey issue.....
 

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Yes, it can be installed wrong. The four cams must be timed properly with the crank. So, you could have all 4 cams phased properly to each other but not to the crank...you could have one or more of the 4 not properly phased to each other. The truck will still run, just not well.

The timing belt covers should be pretty easy to take off with everything else in place. You set the crank on TDC and verify the timing of the cams. Even if one cam is off by one tooth, you will have drivability issues.
 

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Discussion Starter #10
Thanks for the info..I'll take it back to them to see if they will try toi screw me over some more...but I WILL mention that it can be put on wrong to them...

Thanks again
 

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Good luck. My dealer would blame it on me and rechagre me. However, I know that my delaership offers a 1 year warranty on all services that they do. I only had to use this once when they refused to redo the brake TSB for my 2000 Tundra after 9 months. They said that the warranty does not cover wear items such as brake pads. I told them I would be more then happy to pay for new pads at $109 but not another $500 to redo the TSB that they did wrong. They final did it for a reduced rate of $200 including the pads. I have yet to have a problem over 50k miles later. Check your service invoice for any warranty info. By the way how much did they want to do the timing belt and water pump for you? Thank you.:ts:.
 

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I wonder if there would be any engine error codes being stored if the cams were out of time? Aren't there a ton of sensors and such on them to manage the variable timing? Stop by Autozone (or where-ever) and pull the codes b4 going to the dealership.
Let us know what happens!
Good Luck!
 

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probably off by a tooth or so. if off by more, your valves should all be bent and barely run. remember, this is an interference motor and does not take a lot to mess things up. if the dealer did it and are at fault, they should fix for free. if not, report to BAR.
 

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probably off by a tooth or so. if off by more, your valves should all be bent and barely run. remember, this is an interference motor and does not take a lot to mess things up. if the dealer did it and are at fault, they should fix for free. if not, report to BAR.
No...you can actually move cam timing around quite a bit before you bang into valves. In fact, it's typical to index a camshaft on a performance motor...you might run it advanced or retarded to get certain results. Heck, what do you think VVTI and similar systems do? The BMW version, VANOS, uses a helical-cut gear that engages the cam sprockets to physically advance the cams forward when activated.

I had an '85 Supra with a 5MGE that actually had 3 keyways on each cam sprocket so you could advance or retard each cam as you like.
 

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Believe it or not this could be the crank pulley. I just read an article a a few months ago in Motor magazine about problems associated with not properly torquing the crank pulley down. If I recall the bolt must be torqued to 270ftlb (not sure on this number) which takes a special tool to hold the crank from turning.
If just tighten with an impact the pulley can walk messing with the crank sensor signal. This will not set a code but cause drivability problems.
I'll see if I can locate the article and get you more details.
Mike
 

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Having swapped out my water pump and timing belt about a month ago one weekend at a buddies house for my 90k, I have to say, aside from having to pull 1/2 the front end off to get to it, it was one of the easier timing belt changes I've ever done. If you used the Toyota OEM belt, it's fairly idiot proof since it's got markings on the belt itself that match up with the timing marks, assuming the tech made sure the cams and crank were lined up when he replaced it.
 

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Discussion Starter #17
well I'm just trying to explain the HORRIBLE mpg's since it was instaled...not to mention the hard to start in the cold. This truck has NEVER missed a beat when it comes to starting..and now after a new timing belt install the starting is hard and mpg's are WAY down!!!!!! something is wrong... as it was written before could the cams not have been set...it's GOT to be running rich...:cry:
 

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My friends 2003 4.7 was set wrong by the dealer at the 90K change! No real power and rough idle. He drove it that way for 6K Mi. and finally asked me to take a look. We checked compression, and long story is he had to take it to another dealer to get it set right! That dealer called the other and got the original amount refunded. The truck can run pretty well with a one tooth misalignment.
 

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Discussion Starter #19
thanks for the imput...I'm setting the appt now w/ the dealer to get it checked...the fight will be on!!
 

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So what's the latest with your truck........did the dealership fess up about the timing or what?
 
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