chain tensioner Q's, do they wear out/go bad ?

[fast68]

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[99mustang232]

the tensioner spring does wear, but more than likely your chain streched out overtime.... i recently replaced mine with one of engnbldr.com's kits.... it comes with everything you will need like chain tensioner, seals/gaskets, timing chain, steel guides, cam and crank sprokets.... he sells a few diff. kits so pick the one that works best for what you need to do.... I also sugguest changing out the water pump while your at it since it is only about 20-30 for a new one, don't buy remanufactured and you can get it from your local parts store. If you are careful you do not have to drop the oil pain when you do the repair like the haynes manual says.

I was able to get my tc kit from engnbldr off ebay a little cheaper than what he list's it on his site. http://cgi.ebay.com/ebaymotors/ws/eB...%3AMERFB%3AIID (Item number: 7984437932)

here are all his items for sale on ebay = http://motors.search.ebay.com/_W0QQsassZengnbldr

[99mustang232]

ok i got you, I was wondering how you knew it broke without seeing it.... his kit's are pretty decent, i was quite impressed i paid under $50 for something he warranty's for 3 years, plus all parts fit perfectly. you do not get any install instructions from him, but between the haynes and the online docs most people can figure it out. after i slapped my tc cover back on, i got a small oil leak around one of the pan bolts... but it is very slow.

maybe your chain somehow got hung on the tensioner and the sprockets kept turning therefor breaking your chain.... my old chain broke the drivers side guide rail, and the plastic peices were down in the oil pan, there was also slight rub on the cover, when i pulled off my old tensioner it was still in ok shape for 115k miles? are there any play in your sprockets? was your timing off?

[99mustang232]

you will also want to use thread sealer (not threadlok) on a few of the bolts when putting it back together.

[Sidney]

Most engine wear on any engine occurs at startup with that said the R series Toyota engines such as the 18R,20R and 22R all use a timing chain which it's tension is supplied by hydraulically driven timing chain tensioner which has it's oil pressure build up few seconds after the engine has started therefore the timing chain rubs on the driver's side brown colored nylon/plastic timing chain dampener or guide and after so many miles (140-170 000 miles in the city with the average 4 starts per day) the driver's side guide breaks through causing the chain to rub on the timing chain cover for the first few seconds upon startup and when driving in 5th gear and letting off the gas.
Usually by this point the other timing components such as the camshaft sprocket,crankshaft sprocket and chain have their specs out of tolerance and hence must be replaced as well.The tensioner sometimes sticks due to dirt build up and other problems arise as well and must be replaced as well,all of those parts are sold in the aftermarket world as a "timing chain kit" which also include gaskets and a front oil crankshaft seal.Toyota on the other hand for some reason does not sell the parts as a kit but as individual parts which would cost around $400+ and from all of the reading I have done on many Toyota 4-Runner/pickup discussion sites I have come to the conclusion that many experienced off-roaders who cannot afford to buy all of the genuine Toyota timing parts instead buy the chain and tensioner from Toyota and the other parts from aftermarket as a kit but of course don't use the aftermarket chain or tensioner.
The best brand of aftermarket timing chain parts to use on the 20R & 22R series Toyota motors are:

http://www.engnbldr.com/ToyotaHotlicks.htm
http://www.22r.biz/
http://www.rpmrons.com/toyotatiming.html
http://www.toyota-engine-parts.com/
http://www.europeanautomotive.com

and if you choose to buy from Toyota these places have the best prices in the USA & probably the whole world:

http://www.1sttoyotaparts.com/partscat.html (10% shipping)
http://www.toyotadiscountparts.com (free shipping with $100 & up)
http://www.Toyotaparts4U.com
http://www.toyotaofplano.com

Other ways to check timing chain wear are:

http://www.misterfixit.com/chanslop.htm

you can also remove the valve cover and take a flashlight and see if the driver's side timing chain dampener or guide wore through.

You can bend 1 to all 8 valves and have timing cover eaten through if you wait and then coolant and oil mix together to give you butterflies in your stomach.You can do a fluid analysis on your engine oil by going to any Caterpillar and buying a fluid analysis kit for around $15-20 and taking a sample of your old oil.

Finally these sites explain the timing chain replacement well:

http://yotarepair.com/22R%20timingchain.html
http://www.4crawler.com/4x4/CheapTri...ingChain.shtml
http://www.4x4wire.com/toyota/maintenance/timingchain/

Sidney® ™
Repairs tv's,vcr's,home/car audio out of my home
E-mail:sidneybek@yahoo.com
Dartmouth,Nova Scotia
Canada
1985 Toyota 4-Runner,solid front straight axle,factory cruise control,sunroof,22R-E,W56,RN60LV-MSEK,rusted rear step/towing chrome bumper with 245 000 KM

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[qsd-dan]

"There is one little sticky spot in the engine when you turn it by hand, it gets stuck a second then you can continue turning it,
maybe its a toyota thing, i dont know,

can anyone explain it ?"



Yeah, I noticed this with my 22re while adjusting the valves. It seems to do this more often when I turn the motor counterclockwise so make sure you're turning the motor in the correct direction (clockwise). I think it would be safe to say it's a "22r(e) thing." You should be ok.