09-17-2019, 10:31 PM
|
#16
|
Elite Member
|
|
Join Date: Aug 2013
Location: Stouchsburg PA
Posts: 5,353
|
|
Elite Member
Join Date: Aug 2013
Location: Stouchsburg PA
Posts: 5,353
|
puzzler after installing new head gaskets
I’ll try and get a picture of the two dots tomorrow. They are opposite of the single dot. Somewhere I have an extra set of cams. It will be easier taking a picture of them than the cams in the head because the dots face the firewall.
Get a rag and spray it with brake cleaner and wipe off the outside face and see if you can find the second set of dots. My cams are from a 97 and a 96 and both sets of cams have both dots on them.
Sent from my iPhone using Tapatalk
Last edited by 19963.4lsr5; 09-17-2019 at 10:33 PM.
|
|
Reply With Quote
|
09-18-2019, 12:11 AM
|
#17
|
|
Member
|
|
Join Date: Apr 2018
Location: Layton, UT
Posts: 737
|
|
Member
Join Date: Apr 2018
Location: Layton, UT
Posts: 737
|
Quote:
Originally Posted by roscoe67
Hmm - I don't think I would have noticed. If the passenger side, say, was on the single dots, I would still have just rotated the pulley around to TDC. The two pulleys are independent, so I could have misaligned the cams in one head without seeing it at the pulley.
|
You should have noticed if the timing marks on your cam pulleys were 180 degrees off tdc.
If the cam gear dots are lined up correctly, the pin on the end of the cam should be facing up which will align the cam pulleys to tdc
Sent from my iPhone using Tapatalk
__________________
– 96 SR5 5SPD Elocker "the Barnacle"
–02 bmw 540i6
–19 Highlander SE
|
|
Reply With Quote
|
09-18-2019, 11:11 AM
|
#18
|
Member
|
|
Join Date: May 2012
Location: Nevada
Posts: 31
|
|
Member
Join Date: May 2012
Location: Nevada
Posts: 31
|
Quote:
Originally Posted by 19963.4lsr5
I’ll try and get a picture of the two dots tomorrow. They are opposite of the single dot. Somewhere I have an extra set of cams. It will be easier taking a picture of them than the cams in the head because the dots face the firewall.
Get a rag and spray it with brake cleaner and wipe off the outside face and see if you can find the second set of dots. My cams are from a 97 and a 96 and both sets of cams have both dots on them.
Sent from my iPhone using Tapatalk
|
Thanks - I appreciate that.
|
|
Reply With Quote
|
09-18-2019, 11:13 AM
|
#19
|
Member
|
|
Join Date: May 2012
Location: Nevada
Posts: 31
|
|
Member
Join Date: May 2012
Location: Nevada
Posts: 31
|
Quote:
Originally Posted by Joelzy
You should have noticed if the timing marks on your cam pulleys were 180 degrees off tdc.
If the cam gear dots are lined up correctly, the pin on the end of the cam should be facing up which will align the cam pulleys to tdc
Sent from my iPhone using Tapatalk
|
Ah - I see what you are saying. I aligned the dots, ignoring where the pin hole was (figuring to make sure of TDC later when installing the belt), which was obviously wrong.
|
|
Reply With Quote
|
09-18-2019, 06:31 PM
|
#20
|
Elite Member
|
|
Join Date: Aug 2013
Location: Stouchsburg PA
Posts: 5,353
|
|
Elite Member
Join Date: Aug 2013
Location: Stouchsburg PA
Posts: 5,353
|
Sent from my iPhone using Tapatalk
|
|
Reply With Quote
|
09-18-2019, 06:46 PM
|
#21
|
Member
|
|
Join Date: May 2012
Location: Nevada
Posts: 31
|
|
Member
Join Date: May 2012
Location: Nevada
Posts: 31
|
Quote:
Originally Posted by 19963.4lsr5
Sent from my iPhone using Tapatalk
|
Ah. Thanks for taking the time.
And that mark is the same on the other gear? In other words, two dots to two dots?
|
|
Reply With Quote
|
09-18-2019, 08:46 PM
|
#22
|
Elite Member
|
|
Join Date: Aug 2013
Location: Stouchsburg PA
Posts: 5,353
|
|
Elite Member
Join Date: Aug 2013
Location: Stouchsburg PA
Posts: 5,353
|
Quote:
Originally Posted by roscoe67
Ah. Thanks for taking the time.
And that mark is the same on the other gear? In other words, two dots to two dots?
|
Yes. Two dots to two dots.
Sent from my iPhone using Tapatalk
|
|
Reply With Quote
|
09-18-2019, 09:28 PM
|
#23
|
Member
|
|
Join Date: May 2012
Location: Nevada
Posts: 31
|
|
Member
Join Date: May 2012
Location: Nevada
Posts: 31
|
Perfect - all I need to know.
Many thanks the the gearheads here! Time to start tearing it apart . . .
|
|
Reply With Quote
|
09-19-2019, 10:01 AM
|
#24
|
Senior Member
|
|
Join Date: Jul 2011
Location: St. Louis
Posts: 1,090
|
|
Senior Member
Join Date: Jul 2011
Location: St. Louis
Posts: 1,090
|
I replaced the front cylinder head on our cheap Highlander (burnt valve, got the car for cheap, and used a cheap junkyard head) with a V6, and it has the same thing going on with the LH/RH heads. Only on a transverse engine... which one is LH and which one was RH? LOL, I checked, double-checked, triple-checked that.
Then I had some minor issues with the timing belt - used the stripes on the belt to align it, double-checked the hard marks after releasing the tensioner and turning the motor around twice... everything was off a bit, like a tooth or so. So I reset the tensioner, did the belt again, making SURE everything was lined up on those stripes, released the tensioner, and SAME THING. Very slowly it dawned on me I was putting the belt on 'backwards'. Stripes are close enough that it doesn't raise alarm bells while installing it (because the slack is in random spots).
__________________
'99 Highlander 5-spd manual e-locker no-running-board
SS 3" suspension lift/1" body lift/33" tires/'Snowflake' TRD Taco wheels/231mm Tundra brakes/bumpers/armor/sliders/winch/Sherpa Matterhorn rack
Manual front hubs, NWF Eco-crawler transfer case doubler, second gas tank
|
|
Reply With Quote
|
09-19-2019, 06:18 PM
|
#25
|
Member
|
|
Join Date: May 2012
Location: Nevada
Posts: 31
|
|
Member
Join Date: May 2012
Location: Nevada
Posts: 31
|
Just as a follow-up, since I started the thread. I pulled both valve covers and, sure enough, the driver's side camshafts were misaligned. Since I hadn't known about the two dots, I had aligned a single dot to two dots. I realigned it, and now it runs like brand new! Here's to non-interference motors!
But just as a follow-up on the pairs of dots. On mine (1997), on the passenger (right) side, when the two dots are aligned, that means the single dots will also align when they rotate around. Also, when the two dots are aligned, it is not at TDC. In fact, the camshaft gear is 180 out at that point. When the single dots are aligned, it is at TDC. I am not sure why the service manual emphasizes aligning the two dot pairs, since that also means the single dot pairs will align, and it is simpler to align the single dots at TDC. Perhaps it is more of a pain because of compressing valve springs?
Anyway, many thanks to the forum! You got me back on the road!
|
|
Reply With Quote
|
09-20-2019, 09:42 AM
|
#26
|
|
Member
|
|
Join Date: Apr 2018
Location: Layton, UT
Posts: 737
|
|
Member
Join Date: Apr 2018
Location: Layton, UT
Posts: 737
|
Nice!! Glad you got it fixed up, my 96 was the same way, single dots aligned on both cams for tdc.
Sent from my iPhone using Tapatalk
__________________
– 96 SR5 5SPD Elocker "the Barnacle"
–02 bmw 540i6
–19 Highlander SE
|
|
Reply With Quote
|
09-20-2019, 10:51 AM
|
#27
|
Member
|
|
Join Date: Mar 2013
Location: Wisconsin
Posts: 482
|
|
Member
Join Date: Mar 2013
Location: Wisconsin
Posts: 482
|
Good for you!
Now, amend this thread's title with "-Resolved".
Thanks for finishing this up.
__________________
_________
2000 SR5 five speed. Everything works, even the antenna. No special mods; It's my canoe, kayak and dog hauler/winter beater.
I find that things usually go well right up until the moment they don't.
|
|
Reply With Quote
|
09-20-2019, 12:17 PM
|
#28
|
Senior Member
|
|
Join Date: Feb 2019
Location: Hot Springs, AR
Posts: 4,411
Real Name: Patrick
|
|
Senior Member
Join Date: Feb 2019
Location: Hot Springs, AR
Posts: 4,411
Real Name: Patrick
|
Quote:
Originally Posted by roscoe67
Just as a follow-up, since I started the thread. I pulled both valve covers and, sure enough, the driver's side camshafts were misaligned. Since I hadn't known about the two dots, I had aligned a single dot to two dots. I realigned it, and now it runs like brand new! Here's to non-interference motors!
But just as a follow-up on the pairs of dots. On mine (1997), on the passenger (right) side, when the two dots are aligned, that means the single dots will also align when they rotate around. Also, when the two dots are aligned, it is not at TDC. In fact, the camshaft gear is 180 out at that point. When the single dots are aligned, it is at TDC. I am not sure why the service manual emphasizes aligning the two dot pairs, since that also means the single dot pairs will align, and it is simpler to align the single dots at TDC. Perhaps it is more of a pain because of compressing valve springs?
Anyway, many thanks to the forum! You got me back on the road!
|
I'm glad to hear you figured it out! I would assume it's that way for timing purposes. Doesn't it tell you to align the 2 dots together on the right head and single dots together on the left head?
|
|
Reply With Quote
|
09-20-2019, 12:32 PM
|
#29
|
Elite Member
|
|
Join Date: Aug 2013
Location: Stouchsburg PA
Posts: 5,353
|
|
Elite Member
Join Date: Aug 2013
Location: Stouchsburg PA
Posts: 5,353
|
Quote:
Originally Posted by Bad Luck
I'm glad to hear you figured it out! I would assume it's that way for timing purposes. Doesn't it tell you to align the 2 dots together on the right head and single dots together on the left head?
|
The service manual says too do that. I posted clips of it above.
Sent from my iPhone using Tapatalk
|
|
Reply With Quote
|
09-20-2019, 01:30 PM
|
#30
|
Member
|
|
Join Date: May 2012
Location: Nevada
Posts: 31
|
|
Member
Join Date: May 2012
Location: Nevada
Posts: 31
|
Quote:
Originally Posted by Bad Luck
I'm glad to hear you figured it out! I would assume it's that way for timing purposes. Doesn't it tell you to align the 2 dots together on the right head and single dots together on the left head?
|
Right - I was anticipating doing just that, but since I didn't want too have to remove the timing belt, I put it at TDC (crank and camshafts) before opening it up. Upon pulling the valve covers, lo and behold, the single dots were together on the passenger (right) side also. I put a bar on the crank bolt and rotated it around by hand, and when the two dots were together it was 180 out. I am not sure why the service manual says to do it that way.
My error was on the driver's side, putting two dots to one. Doh! Anyway, since the intake camshafts were timed, I just had to remove the driver's side exhaust camshaft and reinstall it correctly: one dot to one dot. It didn't take long at all.
Thanks again to all for all the help!
|
|
Reply With Quote
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is On
|
|
|
|