chain tensioner question
My 99 with 140K on the original motor has the chain slap noise on startup. It only happens after sitting for a day or more. I read that one of the tensioners is more prone to leak down due to it being inverted. Is it the one on top or bottom and should I use the new style or old. I searched and get mixed results. Look like my tensioners are the originals
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I would replace all 3. Of mine two of the three were scored (ims chain & head 1-3) @105K miles.
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Usually its just the IMS tensioner. Replace it and see what happens. Make sure that you have the engine at TDC #1 before you pull the old one!
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To replace the tensioner on a 5 chain engine, do you have to lock the cams or can you just pin the crankshaft pulley @ TDC??
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Can anyone answer this??
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This article might help answer some of your questions
http://www.pelicanparts.com/techarti..._Tensioner.htm |
On my 70K '01 I replaced the 1-3 and IMS tensioner by just locking the engine at TDC. It did help a little on startup chain slap. I tried to get to the 4-6 (the one that hangs inverted and leaks down) but for the life of me could not get the A/C compressor to give me enough room to reach it. I did purchase the updated version and still want it replaced.
I have pulled my C4 fuel pump fuse and spun the engine over enough to pump it up and it cranks normal - although I did get flamed for mentioning this ;-) but it works, it cranks very quite. Not to highjack but has anyone cured this problem by replacing all three tensioners? |
Thanks for the info Joe - looks like I will need the camshaft securing tool #P253 as well as locking he crank pulley.
Late entry: dmw - just read your post, that's what I do after the car has sat for a week - remove the fuel pump fuse, let the engine turn over for 5 seconds or so on the starter motor replace fuse and then start up the car. About 50% quieter than a normal cold start. Over on 986forum.com several guys have replaced just the IMS tensioner & one / both the camchain tensioners with varying results. I have just been quoted close to $A1,500 (US$1,250) to replace all 3 tensioners -2 quotes from Indi's and 1 quote from the OPC who, incidentally, were the cheapest.... |
Jake, do you recomend using the new style or the old? The new style has an external spring on it that maintains extremely force when there is no oil pressure? I saw somewhere, someone recomended only using the old style.
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