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Where are the timing marks on an 1986 K-5 Blazer 305 ci?


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2011-09-14 10:54:53
2011-09-14 10:54:53

The timing mark on all 305 to 400 small block Chevrolet engines from 73 to 87 is on the hamonic balancer which is the pulley behind the crankshaft and has no belt grooves...smooth with a split line on it....that line is the timing mark.


Related Questions

what are the timing marks on a chev 305 motor for the year 1995.

if you look behind the water pump straight down u can see the timing marks.

Where are the timing marks on the Chevy 305 for the timing chain

they are behind the water pump looking strait down from the top of the engine

If you will look stright down behind the water pump, you will see the timing tab.

looking down from (ONTOP) of the engine they are behind the water pump

how to adjust the timing chain on a 1988 kz 305

The only thing I can think of is that the timing tab on your engine has been removed. The hash mark should still be on the balancer, but may be obscured by dirt, grease, or accessories. You might be able to get a new timing tab from an auto parts store or dealer. Some professional quality timing lights have a timing readout, which would eliminate the need for direct reading.

There is no timing belt on a 305 unless it is an aftermarket belt drive system.

That would be an LE9 engine. Those were rated at 210 horsepower and 250 lbs/ft. of torque at 2000 RPMs.

There is a mark on the timing chain cover behind the harmonic balancer(behind the crank pulley). The harmonic balancer also has a slot cut in it so that you can line the crank up with the mark on the timing cover. The mark on the timing cover should sit at the 2 o'clock position or the 12 o'clock position. My 96 Chevy 305 is at the 2 o'clock position.

the 1986 Chevy truck 305 HO produced 180 hp

That would be the biggest and widest mark. Are the first mark on it when turning it clockwise to the pointer.

Try 12 degrees initial and see if it pings. If not, try a little more.


It has a timing chain. All V-8 Gm products have them.

Set timing at 36 degrees at 2000 rpm's

The timing for this engine is electronically controlled and not adjustable

Will a stock 305 motor from a 1986 iroc fit into a 1995 camaro rs?

The easiest way is to look at the Harmonic Balancer. The 305 has a wider thicker balancer than the 350. Pus the timing tab on a 305 is located ON the timing cover and the 350 is bolted on the with the cover bolts. Riky9

The timing on that year engine is computer controlled. It requires an engine scanner to set the timing. YOU CAN NOT USE A TIMING LIGHT.

here the best answer i can give you on the timing of a 305 Chevy engine i seen timing on these engines from 0 to 13 btdc the best way to set the timing is to disconnect the est plug and start the enginge and very slowly turn the dis. and listen to the engine until it runs the smoothest then turn it off and reconnect the est plug and try restarting it it should start nicely if not then you need to readjust the dis. my 305 which is a 1985 is happy at 12deg. btdc. but is built up a little and no poluion bull on it Mine runs good at 8-10 BTDC

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