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Posted on Jan 18, 2010
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Engine timming specs on a 1988 GMC 5.7 WHAT DEG SHOULD i time it at it has a rv cam installed

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Marvin

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  • GMC Master 85,242 Answers
  • Posted on Jan 18, 2010
Marvin
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Timming specs for94 ranger at what degree do you set timming?

Hey S. Arnold, 1) 4cyl 2.3L is 10 deg. 2) 6cyl 3.0 =10 Degrees Special procedures are required for proper adjustments refer to emissions label (Under hood) or service manual , 3) 6cyl 4.0L 10 deg. all are BTDC , hope this answers your question if this helped please check box below (helpful).
Thanks Woody.
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1988 GMC pickup 4x4 350 engine its hard starting and will not idle i gave it a full tune up even a new fuel filter ive checked and changed all sencors on the motor

Do a compression test. The pistons and rings may not seal enough anymore. Try push-starting it in 2nd gear. When you push it ,it will turn the engine faster and build up more compression, enabling combustion to take place. Aslso check if the fuel pressure regulator is not leaking through the vacuum hose, causing it to flood.
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Locate timing belt tenciner on a 1988 pontiac lemanns

Depends on your engine, the 1.6 Korean engine used the water pump as a tensioner and idler. The 2.0 had separate tensioners. And the V6 had a chain. The tensioners are not hard to find, you need to remove the front covers to get to them. If you are changing the belt and tensioner, I would do the water pump too. You have it open, might as well. Hope this helps.
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Timing appears to have jumped 180 deg. How do you

Check to make sure that the timing mark is there when #1 is TDC.Leave the wire on #1 cylinder and place the plug on somethig metal .With all the other plugs removed bump it over until #1 sparks. I would think that maybe the roll pin that holds the gear to the bottom of distibuter may have shered .This would cause issue.The cam and crank sensor will not make your timming off 180Deg.Timming chain will.But 180Deg I would think not.Where is the #1 cylinder when it is lined up in the cap? Make sure that you can't turn your distributer.Don't think you can turn it that far without removing it.
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Setting timming changed headgaskets timing marks up top set but bottom timming mark keeps movihg 15 deg btdc even know start at 5 deg rottor button set on number one but does not start . sounds like it is...

Put the engine at TDC compression stroke , Thats when the valves are both closed on No 1 cyl and the piston is on its compression stroke .then align all cam and crank marks. set distributor/rotor button on No 1 cylinder (rotor pointing at #1 plug wire) . rotate engine 2 revolutions and recheck all marks. Fire away
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I AM REPLACING THE TIMING BELT ON MY 1999 DAEWOO WITH 1.5 LITRE ENGINE AND NEED TO KNOW THE TIMING SPECS SO I CAN SET THE TIMING ON THE CRANKSHAFT....ALSO I NEED TO KNOW THE T.D.C. ON THE #1 CYLINDER FOR...

single cam
cam at 12 o clock
crank at 6 o clock
marks in rear timming cover

twin cam
cams marks face each other 3 & 9 o clock
crank at about 6 o clock mark in cover
all marks are visible on gears and covers
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Set timming

You will need a timing light for Hi energy ignition as well as standard socket set or wrenches. 1. get the engine up to operating temp. 2 shut off engine connect the timing light to the number one[1] spark plug wire at the spark plug end connect battery connectors. 3 start engine and note location of pointer on the mark tab on the timing cover. 4 shut off engine loosen the hold down clamp on the distributor turn the bolt no more than one full turn[snug is better than loose here] then note the position of the dist. cap. Move the dist. to make sure it moves freely replace back to the starting position and remove and plug the vaccum line to the dist. 5 start engine and set timing to the desired spec. 6 shut off engine tighten dist. clamp bolt 7 start engine check timing one more time to see if still there at desired setting. 8 shut off engine dis-connect all tools and light
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What to set timing using timming light

0 degrees BTDC would be the spec , there is a brown w/tan tracer wire near the distributor , you have to disconnect the connector before setting timing
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Timming

Dear invisible148: I don't know which timing marks it is you are looking for, so I will supply you with several.
The timing marks on the crankshaft pulley which the belt ride on, are "NOTCHES" which have been made on to the top edge of the pulley inside shiv. They are in 5 degree increments. The timing cover has a fixed metal tab shaped like a pointer which sits relatively close to the top of the pulley.
The timing marks for the cam gears and the crank gear are small dots which were stamped on the very edge of the cam gears close to where the belt teeth mesh with the gear. The crank gear has a dot stamped on it, close to the edge of one of the teeth where it too meshes with the timing belt.
I hope I have answered your question.
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