Valve adjustment?
- Thread starter Runnin in MT
- Start date
To switch from the theoretical to the actual:
Can any reader of this forum testify to having, on a 5VZ-FE, inserted a thicker shim in the course of checking and correcting valve clearance?
I'm sure readers have inserted thinner shims, particularly on 3RZ-FE engines. My experience with two of these engines is that their exhaust valves do shrink clearance due to valve face and/or valve seat wear.
Can any reader of this forum testify to having, on a 5VZ-FE, inserted a thicker shim in the course of checking and correcting valve clearance?
I'm sure readers have inserted thinner shims, particularly on 3RZ-FE engines. My experience with two of these engines is that their exhaust valves do shrink clearance due to valve face and/or valve seat wear.
BoostedRNR
New member
I didn't have any that were even close to tight. My passenger side exhaust were .001 out of spec on the loose side @ 20 degrees Fahrenheit. When i went to pull the shims and see what size shims i needed to order it had warmed up to 50 degrees and everything shrunk into spec. Most of the valves were on the loser side of the tolerance
Yep.
ajonesnv
New member
I had to to add wider shims on a couple valves on both exhaust sides. When I bought it, it had a lot of valve chatter. 2 of the valves were too far out of spec to even fix with shims, three others where brought into spec from the shims.
appreciated
New member
Good Valve Adjustment Can Make a Huge Difference
I wanted to give back to this great Toyota site and community. When my 1987 rebuilt (30ish thousand miles) 22RE 4Runner was making so much engine noise that it turned heads and sounded like some loose part could fly off anytime. I was able to learn a lot from you all, and feel hope.
We're lucky to have Youtube and others who posted pictures and suggestions, thank you. You make a difference even if you don't let you know.
(The car also made a strange and loud harmonic imbalance sound through and along the exhaust pipe.)
I was running 65% Lucas Oil to quiet it down a bit.
For this very loud clanking/rattling I investigated the timing chain, the time chain guides, the timing change tensioner, engine bearing(s), nuts and bolts loose, bad exhaust and more.
I had personally given it 7 valve adjustments, with little change.
After all that a professional Toyota mechanic still told me that my problem was "valves." After loosening up the oil cap while the engine was running, and us seeing that the cap got slightly suspended above the valve cover like the puck on an air hockey table, but the cap was a bit higher (meaning there was good compression; if the opposite occurs and the oil cap is sucked down it means the opposite,) he told me without hesitation that it was "valves."
I gave it one more valve adjustment, feeling desperate.
I adjusted it cold; the intake I adjusted at .007 and the exhaust .011 but this time I did a much better job of adjusting the gap. I made sure each feeler gauge gap was tighter so it wasn't at all easy to pull the feeler gauge through. (Still the feeler gauge had to go through the gap.)
Well folks the engine quieted down dramatically. I took most of the Lucas oil out, and now it's even quieter, but that may be because the engine oil has gotten heavier due to not having changed it recently.
It did loose some power but not that much.
Good luck all and thanks again.
I wanted to give back to this great Toyota site and community. When my 1987 rebuilt (30ish thousand miles) 22RE 4Runner was making so much engine noise that it turned heads and sounded like some loose part could fly off anytime. I was able to learn a lot from you all, and feel hope.
We're lucky to have Youtube and others who posted pictures and suggestions, thank you. You make a difference even if you don't let you know.
(The car also made a strange and loud harmonic imbalance sound through and along the exhaust pipe.)
I was running 65% Lucas Oil to quiet it down a bit.
For this very loud clanking/rattling I investigated the timing chain, the time chain guides, the timing change tensioner, engine bearing(s), nuts and bolts loose, bad exhaust and more.
I had personally given it 7 valve adjustments, with little change.
After all that a professional Toyota mechanic still told me that my problem was "valves." After loosening up the oil cap while the engine was running, and us seeing that the cap got slightly suspended above the valve cover like the puck on an air hockey table, but the cap was a bit higher (meaning there was good compression; if the opposite occurs and the oil cap is sucked down it means the opposite,) he told me without hesitation that it was "valves."
I gave it one more valve adjustment, feeling desperate.
I adjusted it cold; the intake I adjusted at .007 and the exhaust .011 but this time I did a much better job of adjusting the gap. I made sure each feeler gauge gap was tighter so it wasn't at all easy to pull the feeler gauge through. (Still the feeler gauge had to go through the gap.)
Well folks the engine quieted down dramatically. I took most of the Lucas oil out, and now it's even quieter, but that may be because the engine oil has gotten heavier due to not having changed it recently.
It did loose some power but not that much.
Good luck all and thanks again.
Does anybody know a good mechanic in the Seattle area that can do this? I have a 1996 4runner with 3RZ. I usually do most maintenance myself but don't have the tools or know how for this. I rather avoid the deanships if possible. I called a few local mechanics and both said they've never done this before and didn't have the right equipment for the shim and bucket valves. Thanks!
Here is a how to for the 3rz, it's for a Tacoma but it is the same for a 4runner.
https://www.youtube.com/watch?v=pKEkOdQuJR4
I'm not sure for the V6. I know this is much more common on the 4 bangers.
https://www.youtube.com/watch?v=pKEkOdQuJR4
I'm not sure for the V6. I know this is much more common on the 4 bangers.
St Runner
Member
The Tacoma sites have a lot more on valve adjustment because there are a lot more tacomas with the 2.7. I read a good how to on TTORA which helped a lot when I checked the valves on my 99 Tacoma with the 2.7 Only had one exhaust valve which is slightly under spec. I bought the tool but have not done it yet because getting the shims is a pain down here. bwarren, I would just check the valves yourself first its not hard to measure them and there is no use paying someone a lot of money if they are still in spec
Here is a really good guide to valve adjustment on the v6 3.0LValve adjustment on 3.0L V6. - YotaTech Forums
I am trying to find out when I need to do the valve adjustment on my 1993 V6 3.0. After all the reading I have done I still don't know if "chatter" is a good thing or a bad thing....in my case.
I am trying to find out when I need to do the valve adjustment on my 1993 V6 3.0. After all the reading I have done I still don't know if "chatter" is a good thing or a bad thing....in my case.
tarsotenorio
New member
Need Help From Brasil
Guys, firs time posting here! My name is Tarso, I'm from Brasil and just came back from San Diego - CA. While in SD I had a 2000 4runnner with more than 300.000 miles and I used to love the car. Actually I still love it, but I had to sell it to come back. Now that I'm back in Brasil, I'm trying to find "the one" that I will take with me forever, but it's hard to find the one here in Brasil.
Last week I thought I had found it, but unfortunately, It's in another state and I would have to travel to see it in person. So I asked the actual owner to send me a video of the car with the engine running, and that's what I got:
https://www.youtube.com/watch?v=tvnK98w7JT0
Whatching the video I realized that there is a strange tapping noise while the engine is on. Not sure what it is, but making a good research, I got to this thread:
http://www.toyota-4runner.org/3rd-g...ing-how-many-days-live-doc-2.html#post2774233
My question is: Do you guys think the car from the video has the same VSV (Vacuum Switching Valve) problem, or is it something more serious like a valve problem? Please help! To me it seens like the same tap noise.
I've been dreaming with a 3rd gen 4runner since I sold mine in SD, but not sure if I should give it a chance and travel to another state to check the one from the video out. If that noise is the same Vacuum Switching problem, I would definitely travel just to purchase, grab the car and fix it.
PS: sorry about my english!
Thanks
Guys, firs time posting here! My name is Tarso, I'm from Brasil and just came back from San Diego - CA. While in SD I had a 2000 4runnner with more than 300.000 miles and I used to love the car. Actually I still love it, but I had to sell it to come back. Now that I'm back in Brasil, I'm trying to find "the one" that I will take with me forever, but it's hard to find the one here in Brasil.
Last week I thought I had found it, but unfortunately, It's in another state and I would have to travel to see it in person. So I asked the actual owner to send me a video of the car with the engine running, and that's what I got:
https://www.youtube.com/watch?v=tvnK98w7JT0
Whatching the video I realized that there is a strange tapping noise while the engine is on. Not sure what it is, but making a good research, I got to this thread:
http://www.toyota-4runner.org/3rd-g...ing-how-many-days-live-doc-2.html#post2774233
My question is: Do you guys think the car from the video has the same VSV (Vacuum Switching Valve) problem, or is it something more serious like a valve problem? Please help! To me it seens like the same tap noise.
I've been dreaming with a 3rd gen 4runner since I sold mine in SD, but not sure if I should give it a chance and travel to another state to check the one from the video out. If that noise is the same Vacuum Switching problem, I would definitely travel just to purchase, grab the car and fix it.
PS: sorry about my english!
Thanks
