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YOUR RESEARCHIMS nightmare continues
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Check banks)
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Performed · outcome unconfirmed · Original poster
I visually checked the valves through the hole of the exhaust manifold and it seems not to be any damage to the exhaust valves (I checked both banks).
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Performed · outcome unconfirmed · Original poster
With the engine out of the car, I checked visually the cam timing again.
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Performed · outcome unconfirmed · Original poster
Last time I installed the LN upgrade and it seems that something went wrong and I still have a leak!
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Suggestion · Original poster
Alternatively, I thought about doing a leak test first.
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HI,
For the third time I was forced to drop the tranny to take care of an IMS leak!!!
Last time I installed the LN upgrade and it seems that something went wrong and I still have a leak! (people at LN were great and are sending a replacement flange free of charge...THANKS!)
Now, I have became almost an expert on the disassembly and assembly process, but I found a problem with the IMS not being centered (please see pic).
I did lock the engine on TDC and took the two tensioners out, but it seems that something is still pulling the IMS to the side not allowing it to sit centered.
Any suggestions on what might be the problem here?
I am afraid that if I have to force it to the center during the IMS flange install process I could make it jump a tooth on the chain, and we all not that's NO GOOD!!!
Thanks in advance for the help
IMO either you already jumped timimg on one of the previous attempts or you have not removed the tensioners.....there really is no other explanation...
if the motor is pinned at TDC
The 3rd tensioner located under the A/C compressor maybe pulling it. From the direction of the pull it does look like it is bring pulled by that tensioner.
If you jumped a teeth you should be getting a ck engine light.
I remember my IMS was a little off center when i pulled the bearing out and two tensioners. I just carefully moved it back to center to install the LN bearing.
From this angle it almost looks like the support shaft is not out far enough for the flange "O" ring to seal on the smooth shoulder behind the threads.
I pinned the engine on TDC, then I took the tensioners out and only after that I took out the IMS flange
Jake, Just to confirm, why couldn't the 3rd tensioner be the cause?
Thanks
The 3rd tensioner is at the opposite end of the IMS.. Its force is supported by the plain bearing surface of the front console that supports the IMS.
I've never experienced a 3rd tensioner that caused shaft misalignment, its almost always disassembly thats done at the wrong crank position or came from an engine with compromised timing to begin with.
Jake, was right as expected...engine is out of timing. Unfortunately it seems that I realized the wrong way. I assembled and started the engine and the noise was not what I would call "nice" . I am now dropping the engine and ready to asses damage.
I guees I would need LOTS of help to fix this!!!!
BEst
Do you know of any good tutorial on engine top-end disassembly? I have the factory manual ,but not the best to follow when you do it for the first time.
I assume I will have to take the heads out to see if there is any damage to the valves.
Alternatively, I thought about doing a leak test first. I thought that if a valve has been bent I would be able to find out with the leak test. What do you think?
thanks redridge!!
One question before I start to strip everything out of the engine.
With the engine out of the car, I checked visually the cam timing again. On Bank 2 (passenger side) both cams seem to be at the right timing (notches vertical when on TDC for cyl 1), on Bank1 the intake cam is also at the right timing but the exhaust is not. I visually checked the valves through the hole of the exhaust manifold and it seems not to be any damage to the exhaust valves (I checked both banks).
so here the question. Can I take our the cam cover and realign only the exhaust cam?
thanks
Ok, engine came out and I diassembled the head on bank 1 (bank 2 was in perfect timing, so no ned to strip that one). Fortunately, there seems not to be any damage to valves, cylinder or anything else...so, I am ready to reassembly.
I found that the top of the engine on Bank #2 was flooded with oil, so I guess there has to be a leak somewhere there. I will take care of that one after reassembling the head, timing the cams and installing the valve cover.
Hope I don't get trapped in any other while-in-there stuuf..I need the car back on the road!!
Cheers
What damage did you find??
Cam timing procedures vary greatly between 3 chain and 5 chain engines. How many chains does your engine have? If its a 5 chain the intake/ exhaust lobe separation is easier to remedy. You are going to have a hard time doing this without the tools.
Jake,\
It is a 3 chain. I didn't find any dmage at all. I diassembly the head and everything look perfect. I was even surprise for the low carbon buildup that I found on the cylinder (for the 40,000 miles on the engine).
I bought the tools, but my problem is that the factory manuals only explain the procedure for the 5-chain. Could you help me with the 3-chain?
pic of the intake cam. I'll assume I have to loose the bolt shown in the picture in order to be able toadjust timing, after installing the exhaust cam and chain guide (and the tool?), is this right?
Sledge hammer always ready ..,.just in case!!
I now got all the technical info so ready to install cambers..just waiting for the timing tools to arrive.
I will post progress.
