98 4Runner 3.4L ticking

JeepguyCJ7

JeepguyCJ7

Active Member
Joined
Mar 10, 2007
Location
Stanley, NC
Heya folks, not sure this should fall under the newbie tech or not but I just bought a 1998 4Runner SR5 3.4L with lots of miles (271k). New heads and timing belt installed about 2k miles ago. Motor runs super strong and haven't had any issues until now. I changed the oil today just like I have changed the oil on any other vehicle I have owned in the past, yet after I filled it up and started it, I noticed a significantly loud ticking towards the bottom end of the motor. I am definitely a noob when it comes to internal engine workings but from the research I have done, this could be a lifter not being lubed properly? It speeds up with the RPMs from what I can tell.

Here is a short video/sound bit form the motor running at idle.



It may be a bit hard to hear on the video but its there.


If this needs to be in the newbie tech forums I apologize.

Thanks a ton
 
Could possibly be the infamous Toyota "tick".... what I've read about it is that is causes no harm to your motor... my truck ticks when I'm on the gas and stops when I let off. I'm not positive that its the Toyota tick you have but any help from others would be appreciated by me as well
 
that does seem to sound like an exhaust manifold leak, at the end of the clip when you shut down, I hear a "hissing" sound, which could be exhaust under pressure in the manifold(s) escaping after shut down.

These engines are known for clogging catalytic converters over 150k+, blown head gasket is one of the symptoms. Could be the reason the heads were replaced, they don't like to be overheated, which would happen when the a head gasket blows.

I've been pretty observant of mine and if I get the extra cash I'll replace the converter ( $250ish on RockAuto ), hopefully this happens before the head gaskets go.
 
Is that 3.4 a DOHC engine? do those have lifters?
 
It is a DOHC, no lifters, shim over bucket adjustment, a pain to do well and need a very good selection of adjustment shims a good feeler gauge set and a lot of patience
 
Blkvoodoo said:
It is a DOHC, no lifters, shim over bucket adjustment, a pain to do well and need a very good selection of adjustment shims a good feeler gauge set and a lot of patience
Click to expand...


thats what I thought. But if it is the valevtrain that is making the noise, shouldnt it also be beyond the threshold of "still running strong"?
 
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