Question about Chevrolet 3500

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I have a 3500 chevrolet pickup 454 engine, i need a diagram of the intake manifold something may be blocking the ports for the performance of the egr valve.

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  • hopelessncal Feb 11, 2009

    anyone there?

  • jetfixr May 11, 2010

    What is the problem you are having? I don't know what you mean by "something may be blocking the ports for the performance of the egr valve."

    What year model is the truck?

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The egr valve is pluged up from carbon build up and it quit functioning. take it off clean it up, and also inside of intake with a screwdriver and shop vac. and then purchase a new gasget thats like a screen, they sell them at autozone and put it back on. the screen gasget is for any chunk that you missed in intake and trys to plug up the egr valve again.

Posted on Feb 12, 2009

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Show diagram for sparkplug wiring on 1996 chevy 3500 454 engine


1-8-4-3-6-5-7-2 GM motors are numbered on the driver side as 1-3-5-7 and on the passenger side as 2-4-6-8. These numbered cylinder go from the front of the motor toward the back. Hope this helps.

Mar 08, 2013 | Chevrolet 3500 Cars & Trucks

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EGR Exhaust Gas Recirculation valve


1.6) EGR - Exhaust Gas Recirculation valve (actuator)

What is it? This is a device that reduces engine emissions of nitric oxides by allowing a measured amount of exhaust gas to re-enter the intake manifold and mix with the air prior to entering the cylinders. The EGR can be vacuum (older types) or electrically driven (modern) or a hybrid combination of both (intermediate age). Adding inert exhaust gas to the intake charge artificially enriches the fuel air mix (by diluting the air) and thereby reduces ignition temperatures associated with lean running conditions

Where is it located? The EGR is associated with the intake manifold. The EGR is sited at a point of contact with both the exhaust and intake manifolds. If the exhaust manifold is remote to the inlet manifold, for example onthe other side of the engine, an exhaust feed pipe leading from the exhaustmanifold to the EGR is provided.

How does it work? Generally intake manifold vacuum acting on a diaphragm draws up on a pintle valve to open a connection between a (usually round) entry port for the exhaust gases and an exit port (usually rectangular) to the intake manifold. The opening of some modern EGR valves iscompletely under the (ECU) control of an electrical motor/solenoid. Since an open EGR port effectively acts as a vacuum leak in the inlet manifold leading to potential starting and idling difficulties, the EGR valve operation is often impeded by an electrical over-ride at cold/start-up until the engine reaches running temperature and high revs. The ECU takes signals from the coolant temperature sensor to determine when the engine is hot before allowing the EGR to function. In some cases, a differential pressurefeedback exhaust (DPFE) sensor, connected to pipes on the exhaust feed to the EGR, informs the ECU when and by how much the EGR should be open.

NEXT 1.6b) EGR faults and how to fix

on Jul 15, 2011 | Mercedes-Benz E-Class Cars & Trucks

1 Answer

What is the torque specs on intake 4.3 l v6 vortec


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To install:

  1. Clean all gasket surfaces completely.
  2. Install the intake manifold gaskets with the port blocking plates facing the rear of the engine. Factory gaskets should have the words "This Side Up" visible.
  3. Apply gasket sealer to the front and rear sealing surfaces of the engine block.
  4. Apply a 0.197 inch (5mm) bead of RTV sealer to the front and rear of the block. Extend the sealer approximately 1 / 2 -inch (13mm) onto the heads.
  5. Install the lower intake manifold.
  6. Apply sealer to the lower intake manifold bolts prior to installation.
  7. Install the bolts and tighten in sequence and in 3 steps as follows:
    1. First step to 26 inch lbs. (3 Nm).
    2. Second step to 106 inch lbs. (12 Nm).
    3. Final step to 11 ft. lbs. (15 Nm).

  8. If removed, install the alternator bracket bolt.
  9. Install the coolant by-pass hose.
  10. Install the EGR valve.
  11. Connect the upper radiator hose to the thermostat housing.
  12. Connect the heater hose to the lower intake manifold.
  13. Connect the fuel pressure and return lines to the lower intake manifold.
  14. Connect the wiring harnesses and brackets to the lower manifold.
  15. Install the throttle cable bracket, then attach the throttle cable and the cruise control cable (if equipped).
  16. Install the transmission oil level indicator and tube, if equipped.
  17. Install the EGR tube, clamp and bolt.
  18. Install the PCV valve and hose.
  19. Install the A/C compressor and bracket.
  20. Install the distributor.
  21. Install the upper intake manifold.
  22. Fill the cooling system.
  23. Connect the negative battery cable.
  24. Start the vehicle and check the ignition timing (not adjustable).
  25. Verify no oil, coolant, vacuum or fuel leaks.

    0900c1528008ee88.gif

  26. Install the intake manifold bolts and tighten them to 35 ft. lbs. (48 Nm) in the sequence shown.

May 09, 2011 | Chevrolet TrailBlazer Cars & Trucks

1 Answer

Torque sequence for 1996 chevrolet van intake manifold with a 4.3 litre moter


Ha, you tried to fool me with the bit about a 3.5 L motor--I could find that one...here is the complete procedure from AutoZone.com:




Installation To install:
  1. Clean the gasket mounting surfaces. Be sure to inspect the manifold for warpage and/or cracks. If necessary, replace it.
  2. Position the gaskets on the cylinder head with the port blocking plates to the rear and the This Side Up stamps facing upward. Then apply a 3 / 16 in. (5mm) bead of RTV sealant on the front and rear of the engine block at the block-to-manifold mating surface. Extend the bead 1 / 2 in. (13mm) up each cylinder head to seal and retain the gaskets.

    0996b43f80208c7b.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. Lower intake manifold tightening sequence-4.3L engines
  3. Install the lower intake manifold. Tighten the bolts in sequence and in 3 steps, as follows:


    1. Step 1: 26 inch lbs. (3 Nm).
    2. Step 2: 106 inch lbs. (12 Nm).
    3. Step 3: 133 inch. lbs. (15 Nm).

  4. Install or connect the following:

    Power steering pump Alternator bracket bolt near the thermostat housing Wiring harness to the lower manifold components, including the injector, EGR valve and ECT sensor Air conditioning compressor bracket-to-the lower intake manifold pencil braces
  5. Install transmission oil dipstick tube, if necessary.

    Fuel supply and return lines to the rear of the lower intake
  6. Temporarily reattach the negative battery cable, then pressurize the fuel system (by cycling the ignition without starting the engine) and check for leaks.
  7. Disconnect the negative battery cable.
  8. Install or connect the following:

    Heater hose to the lower intake Upper radiator hose to the thermostat housing Distributor assembly and engage the wiring Ignition coil Connect vacuum hoses to the upper and lower intake manifold. New upper intake manifold gasket, making sure the green sealing lines are facing upward Upper intake manifold Manifold retainers. Tighten them to 88 inch lbs. (10 Nm) using two passes. Purge solenoid and bracket Brake booster vacuum hose at the upper intake manifold PCV hose to the rear of the upper intake manifold Vacuum hoses to both the front and rear of the manifold assembly Throttle body Throttle linkage to the upper intake Wiring to the upper intake components including the TP sensor, IAC motor, MAP sensor and the fuel meter Engine cover Air intake assembly
  9. Connect negative battery cable.
  10. Refill the engine cooling system.
  11. Start the engine and check for leaks.

Aug 26, 2010 | 1996 Chevrolet Astro

1 Answer

Egr valve when does it operate


The EGR (exhaust gas recirculation) valve

What is it? This is a device that reduces engine emissions of nitric oxides by allowing a measured amount of exhaust gas to re-enter the intake manifold and mix with the air prior to entering the cylinders. The EGR can be vacuum or electrically driven or a combination of both.

Where is it located? The EGR is most often associated with the intake manifold. The EGR will be sited at a point of contact with both the exhaust and intake manifolds. If the exhaust manifold is remote, for example on the other side of the engine to the intake manifold, there will often be an exhaust feed pipe leading from the exhaust manifold to the EGR sited on the intake manifold.

How does it work? Generally intake manifold vacuum acting on a diaphragm draws up on a valve to open a connection between an entry port from the exhaust gases and an exit port to the intake manifold. An open EGR port makes starting difficult so the valve operation is often impeded by an electrical over-ride until the engine has warmed up, as signaled to the ECU by the coolant temperature sender. In some cases, a differential pressure feedback exhaust (DPFE) sensor fed by pipes from the exhaust feed to the EGR informs the ECU when and by how much the EGR should be open.

Symptoms of faulty EGR

The EGR has two possible fault modes either it is a) open when it should be closed or b) closed when it should be open. (some EGR faults are in fact more likely to be DPFE related)
  • Poor idling: ‘hunts’ at idle and generally rough engine performance. This is due to the air ingress through the split diaphragm or the EGR valve being left open, either event compromises the intake manifold vacuum and in turn this interferes with the ECU’s ability to deliver accurate fuel to air ratio for a given engine speed.
  • Misfire and ‘pinking’: if the EGR is jammed closed or the exhaust feed pipe is blocked (e.g. gummed up with baked carbon) the engine ignition runs lean and very hot, so hot in fact that the fuel air mix can spontaneously ignite causing a misfire. The misfire if pronounced can, in turn, be detected by the engine knock sensors and this gives the appropriate on board diagnostic error codes along with the check engine light. Due to the diesel engines creating more soot in the exhaust a blocked EGR is a much more common complaint in diesels than petrol cars.
  • Surging: A sticking EGR valve can lead to an effect of rhythmic surging a bit like the MAF fault, especially in turbo charged engines. Normally on a warmed up engine the vacuum from the inlet manifold opens the EGR. If the EGR fails to open promptly the turbo can be subject to a slight boost. Extra fuel/air mix is pushed into the inlet manifold as a result, increasing pressure (decreasing the vacuum). Without vacuum in the inlet manifold the EGR closes again but if sticky does so only slowly. This may allow inlet gases to flow through the EGR into the exhaust manifold for a split second. There is a time lag in the sequence of these events leading the engine to surge in cyclical manner.


How to check? With the engine running it may be possible to force the EGR valve open by pressing on the diaphragm with one’s fingers. Failing that pulling off the vacuum line to the EGR, blocking the pipe on the inlet manifold and applying vacuum to the EGR to monitor function will determine if the diaphragm is split. Removal of the EGR assembly and examination of the ports and valve mechanism will reveal any carbon build up.

How to fix? If the diaphragm is split then the EGR needs to be replaced. Most EGR problems are linked to carbon soot build up and this can be cleaned using a cloth, brush and carburetor choke cleaner spray. If the exhaust feeder pipe is blocked this can be cleaned using a piece of frayed hand brake cable as an internal brush. This makeshift brush can be further enhanced by mounting it in a drill to sweep dirt from the interior of lengths of pipe. Some cars (Hondas are a good example) have an elaborate passage way system to provide exhaust gas to each inlet pipe runner. The only way to clean these out is by removing the blanking plugs (no easy task) and then using the makeshift rotary wire brush and carburetor choke spray. New blanking plugs have to be reinstated to make good the passage ways assembly.




Jul 14, 2010 | 1992 Ford Explorer

1 Answer

I need a diagram for a intake manifold for 1999 chevy s-10 pick-up,6 cyl.,3.0 litre,high performance engine


there is no such engine in a s-10...its either a four cylinder or a 4.3 six cylinder...

Nov 14, 2009 | 1999 Chevrolet S-10 Pickup

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Rebuilt chevy 454 engine, now need distributor and


just put a new starter in my 1993 chevy 454 and now i'm not getting fire, the old starter solenoid was sticking and melted the neg battery cable. I'm wondering if that also burned something else out?

Oct 27, 2009 | 1993 Chevrolet C/K 3500

2 Answers

Where is the EGR valve on 1986 Dodge Ram D50 pickup 2.0cc 4 cyl


if there pipes or tubes on top of your exhaust manifold that is where your EGR valve should be. if you want diagrams or text to help fix this problem i suggest the book from Chilton. they tend to explain thing pretty well.

Oct 01, 2009 | 1986 Dodge Ram 50

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