Please post here if you have busted your oil pump and can directly attribute it to UDPs or aftermarket dampers. Like intake spacers all the information regarding this "issue" are more or less confined to hearsay and a few people's experience on race prepped engines almost 10 years ago. Let us put this thing to bed.
In the Spirit of Intake Spacers: UDPs!
- Thread starter OzzDOA
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You really want to stir things up....
Do a search, there have been some lengthy, flame ridden, threads on this already.
Do a search, there have been some lengthy, flame ridden, threads on this already.
I have searched and all the "classic" posts provide no concrete answers except for "ifs and buts". I want to know how many people have actually broken their oil pumps with UDPs. That's it. No flames, old posts or anything else needed.
YOu wont' find anything recent because this is old news.
This is one EERRRR thing I have about 'newer' members. I dont' mind helping those out that want it. But SHEESH....there ARE people that have been around certain things for YEARS. IE: alot longer than others.
[ame=http://www.mach1registry.org/forums/showthread.php?t=74655]Under Drive Pulleys..and the problems they cause. - 2003-04 Mach 1 Registry Owners Club[/ame]
This is one EERRRR thing I have about 'newer' members. I dont' mind helping those out that want it. But SHEESH....there ARE people that have been around certain things for YEARS. IE: alot longer than others.
[ame=http://www.mach1registry.org/forums/showthread.php?t=74655]Under Drive Pulleys..and the problems they cause. - 2003-04 Mach 1 Registry Owners Club[/ame]
I think it's one or two isolated cases that have been over-HYPED and turned it into a huge scarefest that's been blown out of proportion.
There are thousands of 4V owners running them right this moment and have been for years with no issues.
There are thousands of 4V owners running them right this moment and have been for years with no issues.
Again, nothing containing one person confirming that for a fact the UDPs broke their oil pump. Not a one. I've searched and searched and searched and the only thing that links the two is Al Pappito's and Ed Olin's oft-quoted and linked posts. But the problem is those were under very specific conditions (race prepped/high rpm) 5+ years ago. Things change, designs change and knowledge is not static.
SO....the 4V 281 from 99-04 has changed in the last 5 years? :dw:
The UDPs have changed in the last 5 years? :dw:
Look...you do as you wish, I've been around alot longer to see cars go down as a result. Search the mach section on here. THe end of last year (IIRC) there was a someone that had one fail that wasn't a drag racer. I ahve also seen stock pulleys and the pump fail.
I've been there. I had the UDPs on my DSG and took them off. I defended them and was skeptical along with saying the SAME things you are. I came to the realization that in the end, it doesn't matter. WHY? because the fact is, whether it's poor design in pumps or not, the UDPs INCREASE the chances of something going wrong. Russian roulette. I did not have the $$$ for a new short block had something happened. I decreased those chances by taking them off.
I wonder why flywheels get off scott-free without any scrutiny? :shrug:
Then where are the posts? I can't find them.
A) you aren't looking hard enough....or B) looking in the wrong spots. :dw:
Agreed, reason why I never bought pulley's. Would hear nothing but complains on them, the battery would go bad, a/c, etc. I rather have my car being reliable and not gain 8whp (at the most) than having chances on breaking down.
Here OP...here's just one in a 10 second search.
http://www.svtperformance.com/forums/7371375-post10.html
Contact him if you have any Q's.
http://www.svtperformance.com/forums/7371375-post10.html
Contact him if you have any Q's.
just fyi, only the crank pulley absorbs the harmonic vibration from our engines which is what causes the failure.
Sorry not good enough. The guy admits himself he doesn't think it was the UDPs but the over 100 strip runs he had done on spray.
it's the removal of the stock harmonic damper and installing a lesser then part to replace it or incorrect installation of the new part that will cause failure. an underdrive pulley in it self can not cause pump failure unless installed incorrectly throwing off balance or installing an ebay special part that has been made in china and balanced out terribly that will contribute to it. i have installed aftermarket pulleys on my 5.0's as well as my built turbo honda and never had 1 issue with 10's of thousands of street and track miles combined. i have a lot of friends that run them as well. this is just my experiance with building engines and friends cars.
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Adam Montague a well respected mod tuner told me no worries, he said its the RPM that kills them. When he's seen the pumps go out its 7300+ RPM and they'll do it with stock dampners too.
SOrry...that quote you posted was from before the one I made. Thanks for playing though.
First it's RPMS that cause it, now it's just drag racing with spray. Make up your mind.
Look n00b, you want to believe they aren't an issue, that's your choice. But for those of us that have BEEN AROUND modulars (my involvement is mostly with Machs) alot longer than you dont' have to pull up 4 year old research. Why? cause we've already done it.
Also, next time you try responding like that, try researching alll of his posts and CONTACTING him directly. Cliff notes, at first he didn't believe it was the UDps, then I PM'd him some information and he started doing his research against his car and the information that he had/found. It's obvious you dont' want to find the UDPs as problems, seems how I had to find that guys post to begin with and you couldn't.
I'm done with dealing with n00b's and their ignorance.
A pushrod 5.0 and a honda motor are NOT the same as a modular. internally balanced.
Also, I think the mach's see more issues because they are internally balanced WITH a factory underdrive pulley. The other 4.6 modulars do not have those.
I also believe Ford put in some shitty ass pumps.
WTF?! Then why do you even bother posting if you are so convinced it's a problem. The posts are regarding the same failure. The dude hasn't logged in for almost a month so I'm not going to waste my time in trying to PM him. A lot of people (not just me) are unconvinced that the UDPs are the devil. I am looking for people that have had this failure and can say without a shadow of a doubt the UDPs are the cause. If that isn't you and you have nothing constructive to add then stay out of the thread.
FWIW the quote I posted up is from less than 1 day before the one you posted, and the only thing that changed his opinion (from the posts I read) is you telling him it was the UDPs. Sorry, strike two and three.
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