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[STICKY] How to rebuild a hydraulic tensioner for under $10

Posted: July 9th, 2008, 2:53 pm
by Juans_93_MX3
When you have to replace the timing belt. Its a must that you also get the 2 idler pulleys and the tensioner pulley aswell

I went to several stores and around the internet, it seems that AutoZone has a fair price
$200 for a Durlast kit with no timing belt but a life time warranty
$188 for a Gatorback kit that comes with a belt but I dont think it comes with any warranty.

I went ahead and spent about $250 on the Durlast kit along with a Durlast belt because I could bring back the idler pulleys or tensioner pulleys next time I replace the belt.

But anyway, besides the pulleys and belt itself, the tensioner itself seems very expensive.
http://www.autozone.com/N,15101204/shop ... ultSet.htm" onclick="window.open(this.href);return false;
I searched around, I guess they can go anywhere from $80 to $300.
I was only able to find tensioners from AutoZone and Checkers for about $250.
Ether way, $80 or $300 is a lot of money.
Its a must that you replace all these parts though.

Is there a cheap fix?
You bet your a-- there is. Stock Hondas use this and even some bikes. Some Probe users have done this with no problems.

Building a Manual Tensioner and save $$$
From Probetalk.com user: escortlover19
id love to help ya, but its going to be very difficult to explain over the internet.Basically here is the basics

Before you tear anything apart, REMEMBER to measure the overall length of the tensioner when its fully extended.This will help alot later on.

1.remove tensioner from car
2.find a drill bit that is about the same size as the eclip that holds the stock pushrod into the tensioner.The drill bit should be basically big enough so it makes a hollow hole that replaces the pin and e-clip.Without a tensioner in my hand, i cant give you an exact size for the bit.
3.if you tensioner has a small allen screw, take that out and drain the hydrolic oil.If not dont worry about it, some have it, some dont.
4.Do whatever it takes to remove the inside guts from the tensioner, all you want left is the outter body.
5.take the bit that i told you about earlier and start to drill through the body starting at the end where the pin was.The bit should just fit barely into the body.
6.Drill all the way through the body as straight as possible.
7.Now bring the tensioner to hardware store and find a bolt that fits as tight as possible inside the hole you just drilled.
8.Buy one fully threaded bolt that is as close to the length that you measured before.It should be at least as long as the stock tensioner length was, longer is better if they dont have exact size.You can cut the excess off later if its too long.
9.Buy 2 nuts and 2 washers that fit on the bolt you buy.These will act as the jamb nuts to keep the tensioner where you need it.
10.Take the bolt and thread one nut all the way to the bottom where the head is, then throw a washer on.
11.Now put the bolt through the tensioner and install the other washer and nut.
12.Now adjust the nuts so the end of the bolt is flush with the top nut so its essentially loosened all the way.
13.Now install the tensioner and see how it fits.
14.Now your gunna want to adjust the tensioner bolt till it tensions the belt where you need it.
15.Once you get the bolt where you want it, tighten bolt nuts tight to the tensioner body so it jambs it tight so it wont move.One nut should be loosened, one will tighten to move closer to the tensioner body.


i know this is kind of hard to understand, but you should be able to figure it out once you have the pieces in your hand.If not, i could make you one if you paid me for the work and parts.Id need a s--- tensioner, i can buy the other hardware.It only takes about 30 minutes to make the tensioner, so it would be back to ya in no time.Lemme know if you have problems, and ill try and make one, get measurements,and take pics along the way.Good luck and let me know how it goes.
Pretty much, you want it to be like this...
Image
Except that you want a bolt and washer on both sides.
Yeah basically your replacing the rod with a bolt that is adjustable.There should be a little clip that holds the rod in the housing.The only thing wrong with the pic you showed me, is that you need a nut and washer on both sides of the housing so you can lock it in place.Let me know how it goes.
Yup, you got the right idea.The only thing i worded wrong, was the length of the bolt you want to buy.Id buy one about an inch longer than your measurement.The reason is, you have to add the extra length since youll be putting a nut and washer on before the tensionser housing.Basically it will push the bolt farther out.Just add an inch to the measurement, and cut the bolt with a hacksaw if need be.Either way, you can screw this up 10 times and still be cheaper than a new OEM one
I DO NOT RECOMMEND THAT YOU DO THIS WHILE HAVING A MECHANIC WORK ON YOUR CAR! A mechanic will charge alot of money to do a timing belt job on a FWD car like ours because of how the engine is postioned (East to West). They have to pull out the engine. If they dont install your manual tensioner correctly, they hold no responsibility.

Do this if your working on your engine yourself.

Re: [STICKY] How to rebuild a hydraulic tensioner for under $10

Posted: July 9th, 2008, 5:25 pm
by Nd4SpdSe
Juans_93_MX3 wrote:a FWD engine is postioned (East to West).
Also known as transverse ;)

Actually double-checking my spelling i found that "east-west" is actually a proper as well. Heh, learn something new everyday

Re: [STICKY] How to rebuild a hydraulic tensioner for under $10

Posted: July 9th, 2008, 7:44 pm
by Vanished
Um, you don't have to pull the motor...Not sure were you heard that from. I did my head gasket, motor in.

Re: [STICKY] How to rebuild a hydraulic tensioner for under $10

Posted: July 9th, 2008, 8:03 pm
by Juans_93_MX3
Ether way, it dont matter. Its a PITA replacing the belt and pulleys.

Quick fix for anyone wanting to replace their hydraulic tensioners

Re: [STICKY] How to rebuild a hydraulic tensioner for under $10

Posted: July 9th, 2008, 8:15 pm
by SuperK
Or, you could just shove a 10mm socket in there and call it a day...

Re: [STICKY] How to rebuild a hydraulic tensioner for under $10

Posted: July 9th, 2008, 8:44 pm
by Juans_93_MX3
SuperK wrote:Or, you could just shove a 10mm socket in there and call it a day...
You try whatever you want to do. There are several ways of doing this.
People on ProbeTalk.com prefer drilling a new hole in.

Dont know why, ill ask them. But if it works for them it should work for us

Re: [STICKY] How to rebuild a hydraulic tensioner for under $10

Posted: July 9th, 2008, 10:02 pm
by FlyVFR
What happens when the belt stretches a bit 20K miles down the road? :roll:

Re: [STICKY] How to rebuild a hydraulic tensioner for under $10

Posted: July 9th, 2008, 10:54 pm
by Juans_93_MX3
FlyVFR wrote:What happens when the belt stretches a bit 20K miles down the road? :roll:
http://forums.probetalk.com/showthread. ... +tensioner" onclick="window.open(this.href);return false;
Explains what happens.

Also, honda engines have manual tensioners and so do some bikes. No harm.

Re: [STICKY] How to rebuild a hydraulic tensioner for under $10

Posted: July 9th, 2008, 11:15 pm
by FlyVFR
I'd get a good quality belt...just in case. :wink:

Re: [STICKY] How to rebuild a hydraulic tensioner for under $10

Posted: July 10th, 2008, 1:33 am
by Juans_93_MX3
People on Probetalk.com have been doing this for a while. No problems with them.

I went to Autozone today, got me a Durlast belt along with the timing kit that came with 2 idlers and a tensioner pulley. In total, it was about $250 with a life time warranty. Just letting everyone know. The LLT lets you bring back the pulleys next time you need to change them... acording to the AutoZone workers

Re: [STICKY] How to rebuild a hydraulic tensioner for under $10

Posted: July 10th, 2008, 3:42 am
by FlyVFR
8) :D

Re: [STICKY] How to rebuild a hydraulic tensioner for under $10

Posted: July 10th, 2008, 3:49 am
by fowljesse
This is a very interesting mod.. I imagine you'd need to go in every 10,000ish, and screw it in a tiny bit...? It would be awesome if you do it, and report back in a year or so. I wonder if there is some flex at high torque that the tensioner is designed to make up for. I wish it could be tested scientifically. I always wondered if the valve timing is affected by flex in the system at high torque. Maybe this would actually improve that...?
By the way, I pressed my own bearings into the pulleys, instead of buying new ones.

Re: [STICKY] How to rebuild a hydraulic tensioner for under $10

Posted: July 10th, 2008, 10:49 am
by Juans_93_MX3
fowljesse wrote:This is a very interesting mod.. I imagine you'd need to go in every 10,000ish, and screw it in a tiny bit...? It would be awesome if you do it, and report back in a year or so. I wonder if there is some flex at high torque that the tensioner is designed to make up for. I wish it could be tested scientifically. I always wondered if the valve timing is affected by flex in the system at high torque. Maybe this would actually improve that...?
By the way, I pressed my own bearings into the pulleys, instead of buying new ones.
How did you do that?
You should do a write up.

Anyway, check out the Probetalk.com thread I posted around here. It talks about how timing belts barely ever stretch.

Re: [STICKY] How to rebuild a hydraulic tensioner for under $10

Posted: July 10th, 2008, 12:25 pm
by fieromx3
the original way possted on pt juan is u get a shorter bolt and tap the bottom and thread the bolt in through bottom and pushes the ORIGINAL hydralic arm up not a bolt through the hole dam thing... thats how mines done and been done for like 1.5 months

Re: [STICKY] How to rebuild a hydraulic tensioner for under $10

Posted: July 10th, 2008, 12:29 pm
by mx3autozam
whats the hell cams are you runnin Juan kl36????