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Chevy 305
This category covers questions about the Chevrolet small-block engine variant 305. The 305 had a displacement of 305 cubic inches, with a 3.7350-inch bore, and 3.4803-inch stroke.
1,733 Questions
Answer sounds like a fuel leak more than likely the fuel pressure regulator or the fuel injectors. I had a similar problem with my 1991 Silverado with a 350 TBI . After buying a coolant temperature sensor "The one on the intake manifold which acts as a choke" , I had no further problems . May also be a map sensor . I had similar problem on a 1989 Chevrolet Blazer with a 305 TBI. http://www.autozone.com/N,15900113//shopping/partTypeResultSet.htm
Sounds like you possibly have trapped air in the system. Bleed all trapped air form the cooling system. Jack up the front of the car, and remove the radiator cap. Fill the system to the top with coolant and start the engine. Let it run until no more air bubbles are escaping. Keep it full while doing this. Also look for bleeder valves and use them if equipped. Funny thing, one side of the car was overheating. The trapped air theory seems to have been correct. I'm assuming the the gauage was all over the place because it WAS hot, and then the rush of water came in and cooled it off. Too bad I didn't figure that out sooner. I checked all of the cylinders for leaks after it overheated and found that #4 and #6 actually squirt water out of the spark plug hole. I have ceased driving the car and will fix the head gasket tomorrow first thing (hope the head is okay).
.. The blanket statement don't use 350 heads on a 305 isn't correct. Many of the heads that came on 350 engines had large combustion chambers and fairly large valves, but some will work great. If you put a set of heads with large chambers on an engine that was set up (piston compression height) for small chamber heads you'd get very low compression, which would cause the engine to run poorly and have less horsepower. If you put big valves on a small engine such as the 305, they won't clear the small bores. The head castings from a 350 would physically fit a 305 block, but in some cases the engine wouldn't run very good. Aftermarket heads are sold with varying sizes of chamber volume and shape, different port volumes, and different valve sizes. A person looking for improved heads for their 305 engine should consult with one of the technicians at Summit racing or other high performance parts outlet about their application. Tell the tech what you will be using the 305 for...
How can you tell if you have rod bearings spun on a 3800 motor?
Usually there will be a very loud rhytmic knocking sound coming from the block (entire engine) and sometimes through the exhaust in time with the rise of one piston. The engine will have an uneaven speed when cranking, but may or may not make noise until running. You will have a noticable loss of power and may have other complications if the piston is contacting the head or valves. Only a good mechanic can tell you whether you have a spun bearing, valve train problems, rod knock, broken rings, etc. so I would recommend that you have a reputable shop do a free inspection before jumping to conclusions. Good luck!
Often times, installing larger valves produces better top-end horsepower at the expense of low-end torque. Bigger valves may require rethinking the entire combination: cam, compression ratio, rear end gear ratio, torque convertor, etc. Also, sometimes adding larger valves has no effect at all since the valve opening may not be the limiting factor.
The chev 305 was introduced in the mid 70's and was discontinued in late 90's early 2000's.They were available in all GM rear wheel drive models except the corvette.
Actually, the 305 was offered in the Corvette. In 1980, Corvette fans had the choice of 190 or 230 bhp 350cu.in. engines unless he or she lived in California, in which case the only set-up on offer was the 180bhp 305cu.in. engine.
The 305 was first made in 1976 and has been put in, as stated before, all rearwheel drive GM vehicles. The most popular being the 1500 trucks, Camaros, Monte Carlos, and Firebirds.
The 305 was first available in the 1/2 and 3/4 ton pick up models in 1977. In 1987 they were available with a throttle body electric fuel injection.
What is the firing order for a Chevy 305 and how do you get the timing right?
firing order is 1-8-4-3-6-5-7-2.not sure about timing Answer 1-8-4-3-6-5-7-2 is the firing order for small block chevys. With #1 spark plug out of heads,turn over engine with your finger over spark plug hole.When you feel air being pushed out,the engine is on an com- pression stroke.look at distributor roter. It should be pointing at the #1 plug hole,if it isn't move it so it will be.after you put distributor cap back on,start wiring your spark plug wires over the roter button(#1 plug wire-#1plug)then just follow around the cap in the firing order above. Answer Need to concider altitude, octaine, miles on timing chain etc... Timing is a little fussy on 305's unlike other hevies that like lots of advance, the 58 cc combustion chamber make s the engine finicky where you set it. Stock position about the best. Answer same as any 305 307cept them two have clockwise and counter clockwise orders.. get a timing light.
What is the timing for a Chevy 305?
timing is 6 degree before TDC
AnswerOn my 1978 305 Camaro I've set the timing at 10 deg. before TDC. Sparg plugs used: Accel # 576 with .045 gap. I'm even thinking of increasing the timing to 11 or 12 deg. before TDC and decreasing the mechanical and vacuum advance a little. But since I don't have an adjustable timing light just yet, I can't tell how that would work out.
Ray
AnswerThe timing degrees aloing with the proper spark plug gap, should be on the emission controls decal located under the hood in front of the radiator.
10 degrees btdc is good. but remove the vacuum hose from the vacuum advance first and plug it. set the idle at 750 rpm in drive if its an automatic. 550 if its a standard, then put the vacuum line back on. If you try to start it when its hot, and it bucks the starter, slow the timing down a bit, not much tho. the 10 degree will give you a little more pep. dont forget to gap the plugs at .046 . marlin
What is the firing order for a 1987 Chevy 305?
1-8-4-3-6-5-7-2 All Chevy v8 motors have the same firing order. 18436572. On drivers side from front to back on the cylinders are 1357 on passenger side is 2468 get your #1 cylinder on top dead center with your finger over the hole on its compression stroke by having some one bumping the key slowly. You will feel the air pressure that's what you want. Piston should be all the way up. Then see were the rotor is pointing and that will be were your #1 wire goes. From there put your wires in the order I gave you clockwise.
From the driver seat, no. 1 cylinder is about 11 o'clock on the distributor cap.
The fire order is 1-8-4-3-6-5-7-2.
This is for 305 and 350 engines.
What is the firing order for a 1979 Chevy Camaro 305?
1 8 4 3 6 5 7 2 It is also embossed into the intake right in front of the carburetor.
Is the 1983 Caprice Classic 305 a 4 bolt main?
No There's no factory 4 bolt main 305's Factory 305 4 bolt mains did exist. I have one, came in a 1983 G20 Chevy Van. AnswerThere were none ever produced...no reason to either. ANSWER is YES They where produced BY GM Canada St. Catherines, Ontario they are rare as heck made for service trucks/vans
Where can you find a diagram for the pulleys on a 350 engine?
The diogram is usially behind the ratiator if it is not then it would be under the alternator. If you want the Serpentine Belt Routing diagram for your 350 go on www.alldatapro .com.
How much horsepower would be in a 1985 Buick Regal which has a Chevy 305?
The 1985 Buick Regal did not offer the 305 V8 as an option that year.
How do you Replace a fuel filter on an 1987 R10 Chevy 305 engine?
Is that carbureted or fuel injected???
injectedis on the passanger side frame rail near the fuel tank,.mine has duel tanks and that's where it isWhat happens if you put jumper cables on backwards?
Could blow up the battery, probably burn out one of the main fuses or fuseable links, could mess up the computer or any part of the electrical system of either or both cars.
If by 'jumpstarting the car backwards,' you mean pushstarting the car (with manual transmission) in reverse, then no harm should be done. However, it is often more difficult to start a vehicle by pushstarting in reverse, so whenever possible try to start it in 2nd or 3rd gear forwards.
Where is the starter on a 1997 Chevrolet Venture?
Hey Tanya==It is on the lower left of the engine. If you have to ask, I suggest you let someone diagnoise and repair your truck that knows what they are doing as a lot of times you will do more damage than good. GoodluckJoe
What is a roller valve spring?
Roller rocker arm. The rocker are in the head that transfers the camshaft action to the valve. Opens and closes the valves. On a roller rocker, there is a small roller on the lifter end of the rocker arm. Some small gain in performance due to lack of friction. Very small. In a complete engine overhall where everything is done just right to improve performance, each little bit can have a combined affect that does improve the overall performance. Changing the rockers by themselves is not wort the expense.
What could happen if transmission bolts arent tight on transmission?
Nothing good. Tighten the bolts and this becomes a mute issue.
What does cubic inches have to do with a pickup engine?
The cubic inches of piston displacement are generally considered to be one of the more reliable measures of real power of an engine.
cam timing will not change ignition timing i would try 8 or 10 degees advance at idle with the vacuum advance disconnected.
What do the egr valves do on a 305 Chevy?
The EGR valve in computer controlled engines allows the computers to run the vehicle at a more lean rate without destroying valves and/or pistons. Only a small percentage of the exhaust gas is allowed back into the combustion chambers; just enough to reduce the oxygen percentage in the air mixture, thereby preventing the super-hot combustion that takes place when the fuel in the mixture is reduced. Carbureted engines are deliberately run at a more "rich" mixture to prevent the destruction of the metal parts.
Another answer:EGR. Exhaust, Gas, Recuirculation. It runs the exhaust back through the motor, to burn any unburned fuel, before exiting the tail pipe. It actually aids the catalytic converter. This is what allows the above answer to hapen.Installing a different intake system will alter the air/fuel mixture ratio. In a fuel injected car, if the computer is working correctly, the oxygen sensor will recognize the higher level of air intake, and adjust the ratio by adding more fuel. On a carbureted vehicle, you may need to make jetting changes. (bump it up a jet or two). Regardless, when you alter a vehicle's stock configuration, there's always a chance for things to go awry.
AnswerInstalling a cold air intake will not let too much air into the engine. But as the above poster stated, "there is always a chance".Answer
If you concerned about it leaning out (which shouldn't happen) install an Air fuel ratio gauge and you can determine what your air to fuel is.
