Question about Rolls Royce Corniche

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Flywheel possibly cracked. sounds like a rod knock but seems louder at the bellhousing than the oil pan.can't see any way to loosen converter to slide it back and check flywheel. it's a 75 rolls corniche with a 412 and turbo 400.any hints on the converter bolts.inspection cover is off but adapter plate blocks the conv. bolts.starter looks difficult to remove.

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You have to remove the starter to access the bolts

Posted on Jun 04, 2009

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What's the torque on rod bearings?

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Dec 28, 2015 | 2000 Ford Explorer

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I would remove or have your oil pan removed and check for any unwanted pieces in there. Maybe first see if there is anything stuck to drain screw. Drain oil maybe... You may have blown a rod.

Aug 20, 2012 | 2000 Lincoln Town Car

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Sound gets louder win in motion it has 243,000 miles.culd it be a rocker arm? it has good oil pressure. 2000 jeep grand cherokee laradoe straight 6 4.0 automatic 4x4 makes tapping sound? what should i...

What kind of sound? If it's a ticking sound from inside the valve cover it could be a bad rocker arm, worn lifter or lifter & cam lobe or broken valve spring (needs to be looked at). If the noise is deep and best heard at the oil pan. it could be a rod bearing or main beginning to go but generally, that lowers oil pressure. Another item that sounds nearly the same is a cracked flywheel. Careful listening can often unravel this or have a very experienced tech look at it....(still your choice on who does the repair).

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1 Answer

Knocking engine intermitantly loud sometimes sometimes not another suggested a cracked flywheel ? No loss of power though. starts normal and sounds like it runs normal .

Hi, it could be several things that can knock intermittantly and be louder at times then other times. If it starts normal, I would rule out a cracked flywheel, as you would no right away upon starting. Being that it is 18 years old, bearings tend to wear after time and will begin to knock without loosing power. Like a main bearing, a piston rod bearing. I have seen the pulleys at the front of a engine, the crankshaft pulley knock like a rod bearing getting ready to throw when all it was, was a couple of loose bolts. What you can do is take it out and drive it to get the engine up to temperature, and if you have a friend that can help you by sitting inside giving it some throttle, you can take a piece of garden hose or a piece of wood even, to use like from a broom handle and place it in different areas where you may hear it knock while putting one end on the engine and the other to your ear and you will be surprised what and wear you can find whats knocking. Even lying along side on something soft you can put it up to the oil pan and hear a rod or main bearing knock very fast. I would give this a try as it maybe something as simple as a loose pulley. Believe me, this does work very well, and I have used this process for many years to pin down a noise that is coming from somewhere but only in one spot. Please let me know what you find out. I hope you are able to do this as it can save you $$$$.

Jun 29, 2010 | 1992 Buick Regal

1 Answer

Engine knocking noise in 2000 saab 9-3 SE?

It's a common problem with these cars i am actually fixing mine as of now. That car is all about oil pressure and when it is low you'll start to get a tap and or what sounds like a knock due to the lifters not having enough pressure. Try taking your oil pan off and check your oil pick up line going from the oil pan to the turbo. A lot of times it gets a lot of sludge build up and makes the pressure little to none. If that looks clear check the slump inside the oil pan and see if that has sludge build up. Well hope this helped

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2 Answers

I have a 1993 suburban with the 5.7 it is making a ticking sound i was told it could b the fly whell because the bellhousing is missing and i went throw a big water whole could that b it or do u thank it...

It could be either. Use a block of wood or a screwdriver or for 9.99 at any autozone you can get a mechicanics stehoscope<(spelled wrong lol) Start the engine and climb under the truck. Listen closley to where the sound is comming from. If its more in the oil pan its probably a rod if its further towards the rear of the engine It may be the torque converter or flywheel

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1 Answer

2004 trail blazer knocking sound from engine. Started intermiten and then progressed into louder sound.

bad news...that generally is caused by a bad rod or main bearing (both require engine removal to do it correctly) Or, other cause can be a broken (cracked) flywheel. Bearing problems are generally accompanied by lower than normal oil pressure. flywheel just makes noise with no other symptoms. Have a good reliable shop check it It takes some real experience to differentiate between these noises so only use a shop with good techs and reputation.
If the noise is tapping and not knocking it can also be a rocker arm or lifter.

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2 Answers

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sound like an internal engine problem. either one or more of the pistons has "piston slap" and that knocking will diminish as the engine warms up or possibly a rod bearing is worn out. have a tech do a manual oil pressure test to make sure the oil pump and main bearings are ok. piston slap or knock that decreases when the engine warms up is not that serious, but a rod bearing knock or possible oil pump failure should be taken care of asap.

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1 Answer

99 silverado noise at higher rpm

You likely have a cracked flywheel. you cannot see the bolts without removing transmission so no one can tell if it's broken without taking it apart and looking at it. (If no cracks found between bolt holes, go ahead and do trans work, but I seriously doubt you will have to)

Mar 12, 2009 | 1999 Chevrolet Silverado 1500

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