HT4100 Timing Chain Replacement

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HT4100 Timing Chain Replacement

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Cadillac Forums >> General Technical Section >> Engine Specific >> Aluminum Block V8s >> HT4100 Timing Chain Replacement

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HT4100 Timing Chain Replacement - 3/3/2008 3:04:10 PM

r3db0ss

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Hi, how often do i need to change /replace the timing chain on my 4.1 deville?
I have 175000 miles on it. Do i need to worry about it?
How do i find out if i need to replace the timing chain?

Thanks

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RE: HT4100 Timing Chain Replacement - 3/3/2008 4:39:38 PM

Stealth

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An GM Drive Train Engineer told me once: "the timing chain doesnt owe you anything after 100,000 miles"
Being that he was one of "the men" in the development of all three Allante engines, I do listen to his advice.

I'm running around 140,000+ on it and I pray at it - a lot. Engine still pushed that Allante to 110mph just three months ago and held up well.

A full time mechanic told me that an erratic idle where one can show erratic timing is a definite change the chain yesterday. In my cars, I can pull the D.I.C. and check the timing while traveling at any speed, so far, she is looking good.

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(in reply to r3db0ss)

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RE: HT4100 Timing Chain Replacement - 3/5/2008 7:27:50 AM

r3db0ss

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Thanks for the info, i appreciate it. So i guess i should then change it asap, running that high of a mileage.
Is it a big job, to change one of those for this engine?

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RE: HT4100 Timing Chain Replacement - 3/5/2008 2:41:11 PM

carnut

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A timing chain is a big job regardless of engine. The 4100 has some differences in thermostat housing ( depending on car its in) and bolts used to attach the water pump to the timing cover. Do you have a factory service manual? Are you doing this yourself? Do you rank yourself a better than average shade tree? Factory service manual is a MUST if you do this yourself.

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RE: HT4100 Timing Chain Replacement - 3/5/2008 4:11:21 PM

slowroll

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Big job? little bit. Year and model?

(in reply to carnut)

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