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  #11  
Old 09-16-2008, 07:55 AM
 
Join Date: Aug 2008
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Posts: 22
Default RE: Timing belt and Timing problems

Tech, Thanks for asking, but yes, I put on the belt as the last thing done. I had reassembled the tranny and had it in the cradle when I changed the belt so when I turned the engine (which I did not have toto change theflywheel once out)
The thing that bothers me is that I put marks, my own marks w/ a magic marker on cogs and engine, took the belt off, immediately put the new belt on and I marked where each cog was, and did not move the engine, and made sure that every cog was correct. Now, the only thing I did not do (when changing the belt) the engine was notset on top dead center. I was unsure of the timing marks on the cam. I did not find the marks on the engine for the camsuntil I was reassembling the plastics. Soooo I am sure that all the cogs were correct. I do not understand the configuration of the VVT. I noticed when I took the old belt off that the exhaust cam move 3 cogs, and I assumed it was because a spring/valve was being depressed and the movement was releasing that tension. I do not know the procedure for setting the vvt. When rotating the crank to put on the harmonic balance I noticed that the marks lined up exactly on the cams to the notches in the plastic. I noticed the crank "seemed" to be on tdc if I was reading the marks correctly. Therefore I put everything back as found, only it has no compression.
My questions are:
1. What is the procedure for setting the timing, espcially the vvt.
2. What exactly is the timing mark on the crank and oil pump. I think I had it correct.
3. I only turned the engine over by hand. Could I bend 6 valves by hand and not notice that I was hitting something? I must be some kind of gorrilla if I can.
4. I could find nothing in Chiltons for a volvo s80. Is this t6 engine unique to the s80? Would any other volvo have this engine in it so that I could look at that procedure?
5. How do you hold the cam still? Must I remove the valve cover? It seems from visual inspection that the valve cover is also the cam channels. It seems like when I remove the valve cover that the cam will be ready to come entirely out, with nothing holding it down. Like I implied, I have not removed the valve cover yet, but that's my next move today.
I've done timing belts before, but not on a volvo, and never have I experienced problems like this.
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  #12  
Old 09-16-2008, 09:27 AM
 
Join Date: Aug 2008
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Default RE: Timing belt and Timing problems

I have one other issue with this car, and that is which cylinder is #1? I know this is a no brainer, but, BUT, when I put the timing mark on the crank onto what I perceived (read assumed into this) to be tdc, the piston was not at tdc, but 90 degrees off. I had to turn the crank to 3:00 to get the piston to topdeadcenter. What's up? btw, the piston I assumed to be #1 is closest to the timing belt.
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  #13  
Old 09-16-2008, 01:48 PM
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Default RE: Timing belt and Timing problems

Quote:
ORIGINAL: bigern45
.. that is my one big complaint about the volvo engines.. they all(i dont know of any that arent) are interference heads... so letting the belt brake or come off will WITH ALMOST CERTAINTY damage the valves in the head..
Yeah. It's pretty amazing. You'd think they would design it with a little clearance so that there would be no damage and you could just slap a new belt on there if it breaks. Especially with the turbo models which have a lower compression ratio anyway . . .
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  #14  
Old 09-16-2008, 02:11 PM
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Default RE: Timing belt and Timing problems

Quote:
ORIGINAL: bcon415

Tech, Thanks for asking, but yes, I put on the belt as the last thing done. I had reassembled the tranny and had it in the cradle when I changed the belt so when I turned the engine (which I did not have toto change theflywheel once out)
The thing that bothers me is that I put marks, my own marks w/ a magic marker on cogs and engine, took the belt off, immediately put the new belt on and I marked where each cog was, and did not move the engine, and made sure that every cog was correct. Now, the only thing I did not do (when changing the belt) the engine was notset on top dead center. I was unsure of the timing marks on the cam. I did not find the marks on the engine for the camsuntil I was reassembling the plastics. Soooo I am sure that all the cogs were correct. I do not understand the configuration of the VVT. I noticed when I took the old belt off that the exhaust cam move 3 cogs, and I assumed it was because a spring/valve was being depressed and the movement was releasing that tension. I do not know the procedure for setting the vvt. When rotating the crank to put on the harmonic balance I noticed that the marks lined up exactly on the cams to the notches in the plastic. I noticed the crank "seemed" to be on tdc if I was reading the marks correctly. Therefore I put everything back as found, only it has no compression.
My questions are:
1. What is the procedure for setting the timing, espcially the vvt.
2. What exactly is the timing mark on the crank and oil pump. I think I had it correct.
3. I only turned the engine over by hand. Could I bend 6 valves by hand and not notice that I was hitting something? I must be some kind of gorrilla if I can.
4. I could find nothing in Chiltons for a volvo s80. Is this t6 engine unique to the s80? Would any other volvo have this engine in it so that I could look at that procedure?
5. How do you hold the cam still? Must I remove the valve cover? It seems from visual inspection that the valve cover is also the cam channels. It seems like when I remove the valve cover that the cam will be ready to come entirely out, with nothing holding it down. Like I implied, I have not removed the valve cover yet, but that's my next move today.
I've done timing belts before, but not on a volvo, and never have I experienced problems like this.
Do not remove the valve cover. You will open up a whole new can of worms.

I believe you hold the cams with a special tool that fits into slots at the flywheel end of the camshafts. You need to remove a plastic cover to get to them. But, as Tech said, you should not have to mess with that as long as you have not removed or loosened the VVT hubs. Just line up the cam pulleys with the marks on the timing cover.

The #1 cylinder should be at the timing belt end of the engine.

I would try retiming the cams and the crank using the marks on the cam pulleys(with the plastic cover marks) and the crank pulley (with the mark on the engine block) and see if it lines up with TDC on #1 cylinder.

Does your crank pulley look like this?

[IMG]local://upfiles/17447/5E341FF3883D40DBB3DF7DBBDA2F36B3.jpg[/IMG]

Or like this?

[IMG]local://upfiles/17447/DA9947960D6F442CA48918F05FEC362D.jpg[/IMG]
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  #15  
Old 09-16-2008, 07:34 PM
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Default RE: Timing belt and Timing problems

Yes as along as you did not remove the center VVT screw with the belt off it can move some and not cause a problem at all.

How long was the car down for?

When you look at the top of the Cam Cover (valve cover) does it have torxes screws in the cam cover looking like it would lead to the top of the valve stems?
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  #16  
Old 09-16-2008, 09:38 PM
 
Join Date: Aug 2008
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Default RE: Timing belt and Timing problems

Tech, yes it has torx screws in various places, but now that you mention it they probably are over the valve stems.
And the timing mark looks like the first pics you sent, vegasajetskier.

Car was down for about a week before I started "operating" on it. But it has been 3 or 4 weeks since this first happened.

Now think about it for me, when the crank in on tdc, is #1 at the top? It is supposed to be, but like I said, it is 90 degrees clockwise before the piston is at the top. Have you checked this before? I am betting that volvo does not have it at tdc when crank is marked.

Right now I am looking for the tool that will hold the two cams still, 9995452. Apparently, this is the only way to insure that the cams are lined up when the crank in on the mark and the cams have lost their orientation, as in timing belt breaking. Have either of you replaced a head on one of these types and had to use this tool (cam alignment tool)?
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  #17  
Old 09-16-2008, 09:55 PM
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Default RE: Timing belt and Timing problems

This page shows you how to make your own cam locker tool: http://img142.imageshack.us/my.php?i...dure004qz9.jpg
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  #18  
Old 09-16-2008, 09:57 PM
 
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Default RE: Timing belt and Timing problems

The engine is 2000 Volvo S80 T6 L6-2.8L Turbo VIN 90 B6284T.
Does this help?
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  #19  
Old 09-17-2008, 01:02 AM
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Default RE: Timing belt and Timing problems

just mark them before you take the belt off and when you put the belt back on realign the marks and should be a no brainer from there..there are alignment marks on the cam and the crank...
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  #20  
Old 09-17-2008, 08:41 AM
 
Join Date: Aug 2008
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Posts: 22
Default RE: Timing belt and Timing problems

Bigern45, Thanks for the reply, but "I carefully marked the cams, oil pump and crank, removed the belt and replaced with a new one". The only think wrong with this statement is the oilpump was probably the water pump. I carefully marked everything, and put it back as found.

My synopsis of my mistakes and future steps:
1. I did not set the timing marks on crank & cams
2. I did not continue to rotate the crank 1/4 turn clockwise, then return to timing marks. This seems to be the culprit, as when I did remove the belt the first time the exhaust cam lost its orientation and moved.
3. I need to find the volvo tool 9995452 and secure the cams in their correct orientation, then follow the same procedure for replacing cam seals.
4. The engine is a 2000 Volvo S80 T6 L6-2.8L Turbo VIN 90 B6284T, where the exhaust has the variable valve timing.
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Old 09-17-2008, 08:41 AM
 
 
 
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Tags
2001, 90, 9995452, alignment, b6284t, belt, camshaft, crankshaft, l628l, mark, photo, problems, s80, t6, timing, tool, turbo, v40, vin, volvo, vvt


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