Alright. my dad has a 1994 Toyota 2wd with a 22RE. its at about 115,000-120,000 miles, and in need of a timing chain. its clicking pretty badly between 2000-3000 Rpms. my friend and i told my dad that we would do it for him, since he doesnt have any extra time, fixing and running hay equipment and what not. ive been trying to get him to let us do it, but he wont do it yet. im afraid that its going to cause some major damage if we dont get it done fairly quickly, and i dont really feel up to doing some major work if this thing goes. i wanted to know A) about what is the MAX that you should let one of these timing chains go, as in milage, and B) other than major head damage, what else could happen?

IIRC, recommended mileage to change these is 121K. The 22Rx is an interference engine. If the TC lets go, you stand a chance of having the valves clang the pistons as part of your collateral damage, and you WILL be pulling the oil pan off. Sounds like you're going to be doing that anyway. The other real collateral damage you can potentially have is the TC cover getting worn thru from the chain slop. <img src="/forums/images/graemlins/shame.gif" alt="" /> <img src="/forums/images/graemlins/shame.gif" alt="" />

Check out the threads/tech article to see if you want to tackle this:

http://www.4x4wire.com/toyota/maintenance/timingchain/

Timing Chain Tech in Archive

If you can have him give these a read, go for it.

Thanks alot Kewlnyx. your a great help. im readin them now.

I heard my TC rattle and let it go for around 6 months before the chain ate through the cover. I'd say that was about 4-5k miles.

What does the chain sound like when it rattles? Does it do it intermittently? My 22r makes a horrible growling sound every four or five seconds at idle. I thought that something was rattling loose in the first cylinder, but the timing chain makes more sense. Mine has 177k miles and I'm not sure if the chain was ever replaced. Should I check that first? Mine's an '83 22r.

My opinion is to just pull some late nighters and replace it... easy to do and you'll be happy with the results.

well, the chain rattles everytime your in the 2000-3000 range, and clicks intermitently at idle. i would do the late nighter option, but one of the reasons my dad doesnt want to do it is because of the cost. if this truck is down, hes drivin his 2000 tundra, with the v-8, so hes not so inclined to drive that for a week or so because of gas prices.

Well by the sounds of things, his truck will be out of comission soon anyway and he will be paying for headwork also, or maybe totally ruin the bottom end due to the chain eating through the timing cover. Give 'm the facts and let him eat the sh*t sandwich when it is delivered.

ya, i know. i told him we'll do it as soon as i get out of school (graduating june 2! Class of '07!), so i should have some free time before and after work, but oh well. he eats it if the thing blows...

When I did mine I found the instructions on 4crawlers site which are broken down into 60 steps to be very helpful and easy to follow.

http://www.4crawler.com/4x4/CheapTricks/EngineMods/TimingChain.shtml


Pay attention to how the power steering bracket works when you take it off. It took me a while to figure out how to put it back on.