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How do i find out why i have a upper end knock i just put vortec heads on a 5.7 350 but its an older block that has been punched out 30 over has a mild lunati cam sounds like its out of time please help

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Is it carbureted or fuel injected? Electric fuel pump or mechanical? And does it knock at idle and all engine speeds? Double check your valve adjustment also.

Posted on Dec 13, 2014


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Posted on Jan 02, 2017

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SOURCE: L Reg Vitara engine knock

if anything id say it was the bearing

Posted on Jul 06, 2008

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SOURCE: knocking in cylinder head of escort 1.8 lx td


Engine knock, if it is coming from low down in the block, is usually caused by worn big ends, and is more pronounced at idle or under load.

Diesels, however have the added bonus of being able to create a nice knock due bad fuel atomisation, overfuelling, or excess oil burning.

Bad fuel atomisation is usually caused by dirty injectors.

Excess oil burning is usually caused by a worn turbo amongst other things.

Very best regards


Posted on Jul 09, 2008

  • 75 Answers

SOURCE: (95 Gmc Sierra idling problem- Rebuilt vortec

check the throttle pos sens

Posted on Jul 03, 2009

  • 178 Answers

SOURCE: can you put vortec heads intake and factory fuel

yes tbi and vortec are compatible only thing changing is the intake gaskets make sure to order the gaskets according to the intake you are using i hope i was helpful please let me know if you have further questions and i'll be glad to assist you.

Posted on Mar 06, 2011

  • 2431 Answers

SOURCE: I have Isuzu Rodeo 2000

Low engine oil pump pressure, When the oil light comes on the is a low oil pressure condition, The oil pump circulates the oil . 1. reason for a loss of oil pressure is the excessive clearance in the engine bearing.2. another is for lack is oil passage is block from the oil screen. . is the oil pan damage like it been hit. That can cause a blockage and in return plug the oil passage.When you change the oil was the oil silverish in color, if it is that bearing that are worn and are getting shaved off. Mild or not damage has occurred

Posted on Apr 25, 2011

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Where should my rotor bug be pointing to when num 1 is at tdc on a 5.7 TBI in a 1989 1500 4x4 chevy

The rotor button should be pointed at the number one cylinder on the contact of the distributor cap. Be careful because on some of the GM distributor caps can be a little confusing. The contacts on the inside of the distributor cap can sometimes be a little confusing. Also on another note, those 5.7 vortec heads on a older 5.7 TBI block will make a very noticeable difference. Make sure and check the exhaust and intake ports and see if they are the same size. Some vortec heads have what they call a "Cathedral port". Lastly if you are kinda handy around a shop you can port and polish the inside of the cylinder head yourself. The main thing is to get all of the rough casting burs off the inside of the ports. I have used a flex head dremel tool and sanded them smooth. You will not believe the increase in torque, horsepower, and throttle response. Good luck.

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I have a 1995 K2500 that had the motor changed to a HD 383 Stroker before I bought it / It also has vortec heads. The oil pressure seems really low to me. About 2 to 5 lbs at idle. About 30 to 35 lb

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Can a older block be used to replace a vortec block . I have used a older throttle body block ( 94 ) to replace a newer multiport injection block. I switched heads and intake and seems to run but, not...

it shouldnt be a problem ive used an old block and put heads from a vortec worked fine 4 me,it was carburated though,check ur injectors,they rate differently on yrs,as fare as how much to pump to the motor,could be a problem,

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I was wondering if the ball joints (upper & lower) in a 2000 Silverado 2500 4x4 pressed in or could be knocked out

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