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How to set the timing on a 350 vortec engine

Had to put head gaskets and intake gasketsand now the timing is off and the computer will can not be read with a new scanner

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What year motor Does it have a distributer or what

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Head gasket or intake manifold gaste again 96 k1500 5.7 vortec. starts runs idles and drives rough it likes to **** while trying to drive almost as if it wants to stall out. i put my scanner on it and


The website has software that looks for obscene words.
I would think a compression test would show if the cylinder is having mechanical problems. And yes the intake or head gasket could be leaking again, especially if the intake or head were warped or cracked.
Have you checked fuel pressure ?
Does the spark plug for cylinder 5 show signs of coolant leaking into the cylinder ?

Feb 09, 2013 | 1996 Chevrolet K1500

1 Answer

I have a 350 chevy with vortec heads and a weiand stealth intake what should i torque the intake bolts to?


this can be a very trick question to answer. it depends alot on the type of gasket you have. if you have the factory GM gasket then it may be 11 ft. lbs. but if you have weiands gasket it could be as much as 35 ft. lbs. I would call Weiand's Tech support center at (270)-781-9741 and have a weiand tech engineer help you. Weiand is owned by holley so you my here a greeting from a Holley person when you call that number. hope that helps.

Jun 01, 2011 | 1987 Chevrolet R10

1 Answer

Can you put vortec heads intake and factory fuel injection on an older non vortec 4.3 engine block for a 97 blazer 4x4?


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.

Mar 06, 2011 | 1997 Chevrolet Blazer

1 Answer

1998 Chevrolet 5.7 Vortec Problems.


Most likely the intake gaskets are bad. they will sag in the middle over time and allow a vacuum leak between the head and intake. recommend replacing the gaskets with the steel instead of plastic ones.

Jan 19, 2010 | 1999 Chevrolet Silverado 1500

1 Answer

Where is my head gasketsand what do i have to remove to get to them on my 2000 chevy malibu 3.1l


on top of the block under the head...but before you do that make sure it really is your head gasket that is bad. something that happens in all of these cars and many others that used this engine is lower intake manifold gasket failure. LIM gasket failure can have the same symptoms as head gasket failure (internal and/or external coolant leakage, coolant in oil, white smoke in exhaust, foam at oil filler cap) make sure you have this checked first becuase this gasket is easier to fix than head gaskets because you don't need to dig as far into the engine.

Nov 17, 2009 | 2000 Chevrolet Malibu

2 Answers

Engine swap 5.0 vortec to 350 non computer controled


The computer runs the Transmission from the signals the throttle position sensor, crank shaft sensor, and cam shaft sensor. Your going to have to replace the transmission with an older transmission like the turbo 350 or turbo 400. When it's time to get the car e-tested, that's when your going to run in to problems, due to the year your Chevy is. If your Chevy was a 1985 then you could go with the carb system but with being the newer OBD11 system, your going to have an off road only vehicle with that swap. Why would you want to replace the engine with the 350 carb set up??? There are things you can do to tweak the one in your Chevy free of charge.

Nov 05, 2009 | 1998 Chevrolet K1500

2 Answers

Looking for 2.5 engine on 86 fiero vin r


I just checked Ebay, and there are two listed. You might try Craigs List.

(Tips from me:
Port the Vortec head. Open the Intake and Exhaust ports, by smoothing them out, and smoothing the casting sprue lines out.

Put the Intake gasket, and the Exhaust gasket on the head, (After marking the area with Prussian Blue)
Scribe the opening of the gasket, onto the head, then match the ports to the scribed lines.

You also should round the valve guides top surface. (Where the valve stem meets the guide) There is a square edge that needs to be rounded. This square edge interferes with the fuel/air mixture, as the sharp edge breaks the fuel/air mixture down into droplets.
You want to keep the fuel/air mixture atomized, Not droplets.

Also narrow the casting that comes up the side of the valve guide. (Squared off shape that follows up the guide, and makes the Vortec shape swirl shape in the Intake port) Narrow it to more of a small rounded edge.

Do not polish the Bottom of the intake ports. Leave them as a rough casting. Smooth, and polish the Sides, and Top of the Intake port. (Do not get Extreme! You'll go into the water jacket with your die grinder! Factory may have had a casting shift that day. Just smooth things up)

Makes a nice swirl pattern for the fuel/air mixture.
If you polish the floor, (Bottom), of the Intake port, you will create Two swirl patterns, and they will collide with each other, making droplets again. (They cancel each other out. You want one nice swirl pattern flowing through the Intake port)

I can bring my 1985 Fiero up to 155Mph, (On dragstrip set up for this, tires, and proper safety equipment used). I can also 'Keep my foot' out of the throttle, and get 45 miles to the gallon on the highway.

You can use flat top 350 Chevy pistons. The 2.5 Vin R Fiero engine has a 4 inch bore like a small block Chevy. The pistons can be put on the Fiero rods. Same wrist pin size. The piston drops down into the engine block, about .030 below deck height.

(Wrist pin to piston crown height, is .030 shorter with 350 Chevy piston, compared to stock Fiero piston. You can buy 4 - 350 Chevy pistons AND rings, compared to the price of just the rings, for a Fiero!)

(Thirty thousandths. Real close to 1/32nd of an inch. .03125 is 1/32nd of an inch)

Fiero's have dish head pistons, so the drop in deck height, and using a Flat Top 350 Chevy piston equals out. (Better flame travel with flat top piston. Better burn, more power. Uses more of the fuel/air mixture than a dish head design)
If you can't afford to have them balanced, use a beam scale, and balance them yourself.

I can bring my 1985 Fiero up to 155Mph, (On dragstrip set up for this, and proper safety equipment used). I can also 'Keep my foot' out of the throttle, and get => 45 miles to the gallon on the highway. (Throttle Body Fuel Injection. TBI)

Makes a V6 Fiero cringe!

Sep 14, 2009 | 1988 Pontiac Fiero

1 Answer

Water in oil


Hello, it seems that you have intake gaskets leaking. I'll bet you have the vortec 350. This is a common problem with the vortec, Gm uses plastic intake gaskets and they blow out over time usually to the externally but yours is internally.It is a pretty easy fix for the average mechanic to do. Thank you

Feb 28, 2009 | 2004 Chevrolet Silverado 1500 Crew Cab

2 Answers

I need the torque specs and sequence on a 1998 chevy 350 vortec


Vortecs are a little different that old school small blocks, grab a Haynes or Chiltons, the cross patterns and specs are simply diagramed. Vortec, as any really, start with 25# then 45# and then final torque which I believe is around 70-75# but to be sure verify with the manual. AutoZones, Murry's, Adavance auto all carry the books, Cheap insurance.
Dan

Nov 19, 2008 | 1998 Chevrolet C2500

2 Answers

Swap a 86 350 into a 91 camaro with a 305 TBI


good idea, use 350 block,305 heads &intake.the reason is, if the 91 305 heads are 4 bolts in center of valve cover the are what you call vortec heads,they have better flow.the tbi will respond better &still have bettergas milage than old style heads.the 350 block will add more overall power.you shouldnt have any problems doing so,you will notice a diff.have fun, good luck.

Aug 01, 2008 | 2008 Ford F-350

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