Are there any certain signs of a bad timing chain? Just curious.
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Justin
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Justin
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Re: signs of a bad timing chain?
Play in the crank shaft pulley when the engine is not running.
Reach down (or up if you are under the car) and try to spin the crank pulley, see how much play is in it.
R.I.P. Jason P Harrill 6-12-06 (you will be missed)
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Slapping sounds from under the timing cover if its really extreme. You can see how many degrees the crank pulley will spin before the distributor moves to check the slack in it, but generally speaking they're good for the life of the engine. Unless you have like 300k or something on the motor, you're probably safe.86 Lincoln Town Car (Galactica).
5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley
91 Lincoln Mark VII LSC grandpa spec white and cranberry
1984 Lincoln Continental TurboDiesel - rolls coal
Originally posted by phayzer5
I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousersComment
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Err, I wouldnt go with that answer.Originally posted by gadget73
If its bad enough to slap around, it probably already has jumped a tooth.
R.I.P. Jason P Harrill 6-12-06 (you will be missed)Comment
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I had a small block chevy that had a loose timing chain at 70,000 miles. The chain was hitting the timing cover and making a sound. It had not jumped a tooth yet.
I had a 78 Granada 302 that jumped a tooth while I was driving it. The ignition timing was way off.
Here is how my Haynes manual says to check for a worn out chain:
1. Disconnect the negative battery cable from the battery
2. Place the engine at TDC compression for the number 1 cylinder
3. Keeping the piston on the compression stroke, place the number 1 piston several degrees before TDC.
4. Remove the valve cover
5. Attach a dial indicator to the cylinder head with the plunger in-line with and resting on the rocker arm at the end contacting the pushrod.
6. Turn the crankshaft clockwise until the #1 piston is at TDC. This will take up the slack on the right side of the timing chain
7. Zero the dial indicator
8. Slowly turn the crankshaft counterclockwise until the slightest movement is seen on the dial indicator. Stop and note how far the number one piston has moved away from the TDC mark by looking at the ignition timing marks.
9. If the mark has moved more than 10 degrees, install a new timing chain and sprockets.
TomComment
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