Replace Timing Chain 1989 4Runner
05-26-2012, 03:20 AM
#1
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Replace Timing Chain 1989 4Runner
I purchased an 1989 4Runner from a guy that had it for a short period of time and had no clue what services were done. I looked at the water pump and timing chain cover and they looked new or cleaned very well and looked to be a fresh blue gasket that was not dirty so i thought they had been replaced.
I took off the oil pan and found pieces of the timing chain plastic.
So i bought a kit to install well once i took the alternator, power steering pump, fan, radiator out. The next step was to take off the valve cover and to my surprise the timing chain looked brand new and the plastic guides are intact.
Should i just go ahead and replace the chain? Really hate to spend the money replacing a possibly new chain.
Any signs i should look for if it is old?
The bolts are all intact and so are the plastic pieces.
How could the timing chain plastic fall into the pan without someone noticing? the piece was about 3" long and a bunch of small pieces.
I took off the oil pan and found pieces of the timing chain plastic.
So i bought a kit to install well once i took the alternator, power steering pump, fan, radiator out. The next step was to take off the valve cover and to my surprise the timing chain looked brand new and the plastic guides are intact.
Should i just go ahead and replace the chain? Really hate to spend the money replacing a possibly new chain.
Any signs i should look for if it is old?
The bolts are all intact and so are the plastic pieces.
How could the timing chain plastic fall into the pan without someone noticing? the piece was about 3" long and a bunch of small pieces.
05-26-2012, 05:11 AM
#3
YotaTech Milestone-Two Millionth Post
meh. thumbnail pics. see if you can post full-size images.
probably someone did a timing chain(or not) / cover / water pump /??oil pump service and never cleaned the pan out from the old pieces.
other than obvious wear signs, I believe the only way to tell is by measuring the chain (in the FSM) to see that it is within spec.
probably someone did a timing chain(or not) / cover / water pump /??oil pump service and never cleaned the pan out from the old pieces.
other than obvious wear signs, I believe the only way to tell is by measuring the chain (in the FSM) to see that it is within spec.
05-26-2012, 05:48 AM
#5
YotaTech Milestone-Two Millionth Post
simple answer. no.
do you have the oil pan off and out of the way totally? if yes, I would personally just clean it and the oil pickup tube and screen perfectly, new gasket for it (the tube) and seal the pan back on and run it until you have a problem.
see "THREAD B" in my sig for better pics and explanations.
why were you taking the pan off? are you having an issue?
do you have the oil pan off and out of the way totally? if yes, I would personally just clean it and the oil pickup tube and screen perfectly, new gasket for it (the tube) and seal the pan back on and run it until you have a problem.
see "THREAD B" in my sig for better pics and explanations.
why were you taking the pan off? are you having an issue?
Last edited by 92 TOY; 05-26-2012 at 05:49 AM.
05-26-2012, 09:21 AM
#7
YotaTech Milestone-Two Millionth Post
my humble opinion would be that it's likely from an incomplete repair job. meaning, that they were unwilling to do a full job and left that crap in there.
I would think that if it is running well and you aren't exactly in the mood to do the whole timing chain job / pumps / head gasket, then button it up and call it good.....probably what I would do.
at some point the guide probably broke and eroded into the timing cover (like mine) and caused a mix that necessitated a repair.
I would think that if it is running well and you aren't exactly in the mood to do the whole timing chain job / pumps / head gasket, then button it up and call it good.....probably what I would do.
at some point the guide probably broke and eroded into the timing cover (like mine) and caused a mix that necessitated a repair.
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