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Old 10-16-2022, 10:31 AM #1
BretMann BretMann is offline
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3rd Gen. 4 cyl. (3RZ-FE), valve springs issue?

I heard that the 3RZ-FE engine has a known issue with the valve springs, where they begin to fail at about 130k miles. Is this true and if so:

1- Was it factory fixed and is there a model number or date to identify which trucks this effects.
2- If not factory fixed, is there a dealer recall?
3- If neither factory or dealer fix recall fix, would a DIY fix mean removal of the head to replace them?
4- What is the correct updated replacement part No.?

Thanks.
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Old 10-16-2022, 01:11 PM #2
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Never heard of this issue. But the 3RZ does tend to burn valves if the lash is never adjusted. The 5VZ can typically get away without an adjustment.
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Old 10-16-2022, 03:09 PM #3
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I thought you guys would know about it since I heard it was a known issue. So I went down the rabbit hole now and found it here:
Our Toyota’s Engine Has a Serious Problem & Expensive Problem | Now What? Baby Yota Ep.8 - YouTube

It's about a 2002 Tacoma with the 2.7l engine - same as mine? At 2:30 the mechanic explains the issue with the valves (not the valve springs as I stated). At 4:20 it shows a glimps of what I think is the engine label that shows X3R-N84.
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1999 4Runner(3rd Gen) Base, Engine: 2.7L (3RZ-FE), Trans: 5sp manual (R150)
Miles as of 10-2022: 107k
VIN: JT3GM84R2X0047863
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Old 10-16-2022, 06:49 PM #4
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Like JZiggy said, these engines had problems with burnt valves. I've never heard of the valve spring issue.

I think I've viewed the video you linked a while ago (can't listen, at library), if I remember correctly they're referring to the burnt valve issue. And they recommend getting the valves adjusted, same thing you do to avoid burnt valve.
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Old 10-17-2022, 12:59 PM #5
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Quote:
Originally Posted by BretMann View Post
I thought you guys would know about it since I heard it was a known issue. So I went down the rabbit hole now and found it here:
Our Toyota’s Engine Has a Serious Problem & Expensive Problem | Now What? Baby Yota Ep.8 - YouTube

It's about a 2002 Tacoma with the 2.7l engine - same as mine? At 2:30 the mechanic explains the issue with the valves (not the valve springs as I stated). At 4:20 it shows a glimps of what I think is the engine label that shows X3R-N84.
The Tacoma has a different engine, the 2RZ. We have the 3RZ, or the 2.7L engine. Any engine can benefit from some regular maintenance including valve clearance adjustments. It's not a ticking time bomb though.

Careful about searching the internet. If you search long and hard enough you'll find critical, life-threatening issues on your vehicle for parts it doesn't have that you never knew existed. It's like searching WebMD when you have a sore throat and come back thinking you now have throat cancer.
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