Kia Forum banner

1 - 20 of 32 Posts

·
Registered
Joined
·
14 Posts
Discussion Starter · #1 ·
I have a 2006 sorento ex 3.5L. It had a blown head gasket so I took off the heads and took them to a machine shop to check heads. They shaved the heads to make sure they were flat and strait. I put everything back as it should be replaced water pump while I was there and also timing belt. I turned the crank so the timing marks were lined up, the lined up the marks on the driver side head as they are marked, then lined up the other head sprockets as the timimg marks state. Now that everything is back together I get nothing. I did check and it is getting fire at the spark plug and gas but nothing. I checked compression and it want read anything........ It did backfire one time while turning the engine over. I am lost on this stupid thing now. I would love to have some advise on what to do next. DIY Shadetree Mech.
 

·
Registered
I now drive a 2020 Ram Bighorn. Had an 03 LX 3.5 Sorento
Joined
·
2,514 Posts
:00000732: to the forum.



Did you make sure the crank was set at TDC(Top Dead Center) when you aligned the mark? The crank can be 180 deg. off and the mark still lign up. If you have 0 lbs compression in all the cylinders that is most likely your trouble. Assuming(I know, don't say it) the head gaskets are installed correctly you should not have to remove the heads again.
 

·
Registered
Joined
·
14 Posts
Discussion Starter · #3 ·
I know for a fact the head gaskets are on correctly. I double tripple checked that. Yeah thats what has me a little confused on the crank pulley. The mark on the crank pulley lines up when the 1 piston is TDC, when I turn the crank one rotation and line the crank marks up the #1 is again TDC. How do I know which rotation is right and not the 180 degrees off? I have took that belt off and put back on until I'm about to go crazy. I have only checked the compression on #1 and #2, because that was the easiest ones to get to. Should I just make sure all marks are lined up correctly and hook the Battery up and try to crank it? I'm lost!!
 

·
Registered
I now drive a 2020 Ram Bighorn. Had an 03 LX 3.5 Sorento
Joined
·
2,514 Posts
As long as the piston is at the top of the stroke and all the valves are closed on the head for the #1 piston, the mark is lined up that head should be ok. The other head then gets lined up on the marks. Install the belt, adjust the proper tension and then HAND CRANK it very lsowly a couple of revolutions to check for any interference. You have previously stated you checked the compression so hopefully you didn't prang some valves in the process. Once you do that don't reassemble untill you check for compression in all the cylinders. No sense in putting it all back together and it not be good. If you get compression then put it together and hope for the best.
 

·
Registered
Joined
·
14 Posts
Discussion Starter · #5 · (Edited)
Thats the weird thing, all the diagrams and service manuals tell me the #1 cylinder is the front one on the passenger side, ok the sprockets on that head are open???? when the marks are lined up on that head. they should be closed..as you stated. ???? The head on the drivers side are all closed when the marks are lined up.. So did the machine shop take off the sprockets to true up the head and put them back wrong??? I am afriad to say it :( but I don't think I put the wrong head on each side because everything is lined up that goes back.... OMG!!!!

Thank you so much for your help with this!!!!!!!!!

Ok just made sure the heads are on the correct side OMG I was about to freak the hell out if that was wrong, but now I'm sure thay are right.

Ok got home and checked all the gears and timing marks. The gears have not been moved on the head. Looking at the motor from the front of the car I put the front passenger side piston at TDC started the belt there on crank went up to guide pulley then to gear on drivers side with marks lined up then under the water pump then back up over the gears( which I had to use a socket to line up the timing mark) then the next gear which I had to line up with the socket also then tentioner pulley. turned the motor over twice and marks line up. If I am using this compression tester correct I have no compression. I thought that the TDC #1 cylinder's head timing marks should line up by hand which tells me the valves are closed?? The gears on the drivers side is perfect lined up with no pressure on them like that head has the valves closed? I'm so confused. Pressure tester should be put in the #1 piston and holding the trottle open turn the motor and pressure should show right?
 

·
Registered
Joined
·
14 Posts
Discussion Starter · #6 ·
As long as the piston is at the top of the stroke and all the valves are closed on the head for the #1 piston, the mark is lined up that head should be ok.
I think this is the problem with the #1 at TDC the gears with the marks dont line up with valves closed on that head.
 

·
Registered
I now drive a 2020 Ram Bighorn. Had an 03 LX 3.5 Sorento
Joined
·
2,514 Posts
All I can say is that every time you crank that engine over not knowing it is correct you run the chance of bending a valve. If the valves are not closed on #1 cylinder when the piston is TDC you will not get compression when you are supposed to. If the are closed then move to the next cylinder slowly turning the engine over and see if when it hits TDC the valves are closed. If you do this to a few cylinders you will likely get good results. Other than that since I am not there it is very difficult to see what you are doing.
 

·
Registered
Joined
·
14 Posts
Discussion Starter · #8 ·
I hear what you are saying and I agree, but that is my problem when I have the #1 cylinder at TDC if the valves are closed on that head then the timing marks will not line up. The only time they will line up is when the valves are open on that side. On the driver side head the marks line up with the valves closed.

I really do appreciate your help.
 

·
Registered
I now drive a 2020 Ram Bighorn. Had an 03 LX 3.5 Sorento
Joined
·
2,514 Posts
I will try this again. Be patient. If the #1 piston is at the TDC position and the valves for #1 are open then you need to turn the camshaft(very slowly) 1 turn and see if that works. Keep turning till the valves close and it is TDC. You may have to turn the crank back and forth as you turn the camshaft. You have to get the valves closed while the piston is TDC. Once you have the PS done you have to get the next cylinder in the fireing order on the DS and do the same. Up to TDC and check the valves. If you get that done then put the belt on and slowly turn the engine over and check each one in order. If you get the first 2 cylinders in the fireing order to behave you should have it licked. It is late here on the West Coast so get some sleep and try it in the morning. I have done one of these and for the first timer they can be intimidating.
 

·
Registered
Joined
·
14 Posts
Discussion Starter · #10 ·
Ok so what you are saying is I need to keep turning the sprockets on the head of the cylinder(#1)that is TDC until the marks line up, because eventually it will. I will be working on it again tomarrow so we will see. Again thank you so much for your help.
 

·
Registered
I now drive a 2020 Ram Bighorn. Had an 03 LX 3.5 Sorento
Joined
·
2,514 Posts
I need to keep turning the sprockets on the head of the cylinder(#1)that is TDC until the marks line up,
Yes. Then it gets tricky. You then install the belt and slowly turn it until the next cylinder in the firing order gets tdc. Check to see if the valves are closed. If they are slowly move to the next and so on. If 2 are aligned chances are you are good. Once you have done that continue turning the engine over by hand and recheck your marks with #1 at tdc.
 

·
Registered
Joined
·
14 Posts
Discussion Starter · #12 ·
You not going to fing believe this!! :( I had a sneaky feeling and took off the valve cover and there lies a bigger problem..... Bend valves!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Dang it!! So The valves on passenger side head closest to the fender are bent and the valves on the drivers side closest to the fender are bent. I am going to have to order 12 Intake valves.... Man this is a huge lesson learned.
 

·
Registered
2003 Kia Sorento
Joined
·
3 Posts
:)I just finished replacing the timing belt on my 2003 sorento,last week. what I found,was they tell you to line the timing marks up, & rotate the engine thru two revolutions & see if everything lines up. what they don't tell you,is when you go to put the proper tension on the belt,is that all the marks will be off one tooth. you have to set everything one tooth off, to get alignment with proper tension on the belt. this is not as easy a job,as everybody thinks, & believe me, it was scary when I turned the key to start it ! either I saved money or destroyed valves ! Started right up ! what happened with me,is when your trying to get it right, the passenger side sprockets are under pressure & will spin. As you put on the belt,zip tie it as you go, so things won't get out of hand. Hope this helps !
 

·
Registered
I now drive a 2020 Ram Bighorn. Had an 03 LX 3.5 Sorento
Joined
·
2,514 Posts
You not going to fing believe this!! :( I had a sneaky feeling and took off the valve cover and there lies a bigger problem..... Bend valves!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Dang it!! So The valves on passenger side head closest to the fender are bent and the valves on the drivers side closest to the fender are bent. I am going to have to order 12 Intake valves.... Man this is a huge lesson learned.
Sorry to hear that. Each time I read that you spun the engine I kept telling myself "I hope he doesn't bend a valve". Lessoned learned. When you put the heads back on do one at a time. PS #1 first then DS #2 next. If those 2 are installed in order the rest should follow suit. Keep us posted.
 

·
Registered
Joined
·
14 Posts
Discussion Starter · #15 ·
I have to order the valves so I can take a break for 5 days... Let me ask you a silly question What do you mean by PS #1 then DS #2? My mine just can't wrap around what that means... I know stupid ain't I.
 

·
Registered
2003 Kia Sorento
Joined
·
3 Posts
he means passenger side# 1 -ps1. then driver side #2- ds2. sorry for your trouble,but if I had t to doover, I'd spend the money,& let the dealer do it !
 

·
Registered
I now drive a 2020 Ram Bighorn. Had an 03 LX 3.5 Sorento
Joined
·
2,514 Posts
he means passenger side# 1 -ps1. then driver side #2- ds2.
Yes. And no, your not stupid. Frustrated maybe. ;)


Don't forget you may need to lap those valves before you stick the heads back on. Lapping them in helps the seats match the valve seat.
 

·
Registered
Joined
·
14 Posts
Discussion Starter · #18 ·
Ok update, Got the valves in and heads put back on. The book states to put #1 cylinder at TDC (compression Stroke)? I know that you have to rotate the crank 2 times to line everything up, but i aint rotating nothing until I'm sure that everything is right(lesson learned) So how do I know what the compression stroke is? I read that you can have it off 180 degrees. What I did is rotated the crank until the #1 came up to TDC and the marks lined up on the crank. The way I think is when the piston is coming up is the compression stroke, is this correct?

Again Thanks for all the help.
 

·
Registered
I now drive a 2020 Ram Bighorn. Had an 03 LX 3.5 Sorento
Joined
·
2,514 Posts
The piston comes up two times in a 4 cycle engine for one fireing cycle. That being said, with the #1 piston up and the marks on the crank and the block lined up you are at TDC compression stroke. I would have done that prior to the heads being installed to prevent "tapping" of the valves. If you did that then I misread your post. After the marks are lined up and before you install the heads, turn the cams so that the #1 cyl valves marks are lined up. The valves for that head are then ready and out of the pistons way when you gently install the heads.
 

·
Registered
Joined
·
14 Posts
Discussion Starter · #20 ·
Yes, I did put the #1 at TDC before I installed the heads, and the mark on the crank was lined up with that mark. I could not line up the cam marks because the marks to line the gear up to is on the valve cover. The only thing I am worried about is that the crank being 180 degrees off. Correct me if I am wrong but like you stated above the 6 cylinder rotates 2 times in one firing cycle. One is power stroke and one is compression stroke correct? Can the #1 piston be at TDC on both strokes? If so I need to make sure it's on the right one before I line the camshaftes up with there marks and install the timing belt.
 
1 - 20 of 32 Posts
Top