V6 Valve Cover Gasket Replacement
#47
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Engine Codes Help
Great guide! Just did this job successfully but it took me quite a while to finish. Had a small leak in the rear valve after I turned it on but I may have just forgotten to torque one of the bolts. Luckily I could reach the engine cover bolt with everything reassembled.
After I finished I had 2 codes pop up which were not there previously: P1135 and P1155. I am assuming I damaged or did not clip in an electrical connector properly. Can anyone point out where to start looking? Should I try the electrical clip close to the firewall coming off the A/F sensor below? I tried to reach back there and see if it was properly engaged. Thanks in advance!
After I finished I had 2 codes pop up which were not there previously: P1135 and P1155. I am assuming I damaged or did not clip in an electrical connector properly. Can anyone point out where to start looking? Should I try the electrical clip close to the firewall coming off the A/F sensor below? I tried to reach back there and see if it was properly engaged. Thanks in advance!
#48
Hi speedcar9 et al,
Please let me begin by saying I will try not to create confusion here. I tried to get a Moderator to PM me but no one replied. I wanted to run the following by the Moderator privately, but looks like that isn't going to happen. So I'll present my observation as follows:
In your 09-12-13 8:16am post, you say, "Install eight valve cover bolts <aka "cylinder head cover" bolts>. Torque spec is 59 in – lb." (ie. fifty-nine) . I have a 2000 RX300 that also has the same 1MZ-FE 3.0L V6 engine. It says so on the sticker under the hood and is also confirmed here:
https://en.wikipedia.org/wiki/Toyota_MZ_engine .
That said, the Lexus shop manual for the RX300 says to torque them to 69 inch lbs (ie. sixty-nine). "69" is seen on page EM-66 (ie. Engine Mechanical)
"69" is also seen on page SS-7 (ie. Service Specifications):
All this begs the question, does the 1MZ-FE 3.0L V6 engine use 59 or 69 inch lbs on the valve cover bolts? What do your ES3xx manuals say? It's got to be either one or the other. I can't imagine Toyoto saying 59 on one vehicle, and 69 on the other. That doesn't make sense. "Something is rotten in the state of denmark."
Let me add this, I had an oil leak on the driveway from the left cover (ie. front-most cover) on my RX300 and found they were all very loose. I used a reliable inch-pound wrench on them (done in a couple passes). To my hands, 69 seemed like way too much torque. I thought I was going to strip one of them, but eventually got the "click" (maybe oil under the bolt head).
I look forward to your thoughts/comments/etc on the 59 vs 69 dilemma.
Regards . . .
Please let me begin by saying I will try not to create confusion here. I tried to get a Moderator to PM me but no one replied. I wanted to run the following by the Moderator privately, but looks like that isn't going to happen. So I'll present my observation as follows:
In your 09-12-13 8:16am post, you say, "Install eight valve cover bolts <aka "cylinder head cover" bolts>. Torque spec is 59 in – lb." (ie. fifty-nine) . I have a 2000 RX300 that also has the same 1MZ-FE 3.0L V6 engine. It says so on the sticker under the hood and is also confirmed here:
https://en.wikipedia.org/wiki/Toyota_MZ_engine .
That said, the Lexus shop manual for the RX300 says to torque them to 69 inch lbs (ie. sixty-nine). "69" is seen on page EM-66 (ie. Engine Mechanical)
"69" is also seen on page SS-7 (ie. Service Specifications):
All this begs the question, does the 1MZ-FE 3.0L V6 engine use 59 or 69 inch lbs on the valve cover bolts? What do your ES3xx manuals say? It's got to be either one or the other. I can't imagine Toyoto saying 59 on one vehicle, and 69 on the other. That doesn't make sense. "Something is rotten in the state of denmark."
Let me add this, I had an oil leak on the driveway from the left cover (ie. front-most cover) on my RX300 and found they were all very loose. I used a reliable inch-pound wrench on them (done in a couple passes). To my hands, 69 seemed like way too much torque. I thought I was going to strip one of them, but eventually got the "click" (maybe oil under the bolt head).
I look forward to your thoughts/comments/etc on the 59 vs 69 dilemma.
Regards . . .
Last edited by Brcobrem; 12-22-20 at 01:45 PM.
#49
Lexus Fanatic
INCH POUNDS not foot!!!!!
#51
Lexus Fanatic
Off the top of my head 69, somewhere around there. That is very low torque for that reason I tighten them by feel using a 1/4" drive ratchet. This may be heresy to some but for the firewall side bank I RTV the entire surface not just the sharp bend areas. I've had seeping oil after a few years (more like 6-7) on some jobs I've done coating the entire surface eliminates this. Sucks for the next person though.
#52
Just fyi: I talked to the Service Manager at our local Lexus dealership. He said the cylinder head cover torque spec for both the 2000 ES300 and 2000 RX300 with the 1MZ-FE 3.0L V6 engine is 69 in-lb. He said, "I've done plenty of these. In fact, if you order the special bolts for either vehicle, it's the same part number."
Hope that helps someone.
Regards . . .
Hope that helps someone.
Regards . . .
#53
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Hi fellows, just replaced my valve cover gaskets on my 2002 ES300, and I’m looking for the tightening sequence for the valve cover bolts. Any help will be greatly appreciated. Thanks. Carlos.
#54
Lexus Fanatic
Start with the middle bolts and work your way out tightening in stages, then as a final step torque to spec.
#55
For what it's worth, "9c" in my 12/22/20 post above say's "uniformly tighten..." (see above).. That said, if it was me and no specific pattern was given, I too would "uniformly tighten", beginning in the middle (to allow gasket to "roll out" if it need to). That means lightly tightening beginning in the middle. There my 2 cents.
Regards . . .
Regards . . .
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