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I believe what you're talking about is that there is two timing tabs on the motor. One at 1 o'clock and 1 at 5 o'clock. The top one is hard to see so gm put one on the bottom where it is easier to get to or see. If you use the top tab you hook your timing light to the #1 plug wire and if you use the bottom tab you hook to the #5 wire
What else can I help you with?
Set timing on class a motorhome Chevrolet 454 1986 there is two timing marks?
Check if you have secondary timing marks installed. Mine are bolted to the oil pan and easily accessible from the bottom. Instead of using cyl #1 for setting the timing, you will have to use #5 or #8 (to make up for the 90 degrees offset to the factory timing marks
Where are the timing marks on a 1986 Mazda b2000?
the timing marks for that year Mazda are on the crank pulley and corresponding marks are on the timing belt cover.
Where is the timing mark on a 1986 Mercedes 190e?
The 1986 Mercedes-Benz timing marks can be found on the main pulley. The timing marks will be scattered around the outside of the pulley.
Where are the timing marks on a 1986 vw golf located?
they are under the timing hole cover in the top of the transmission. it is a large(27mm) Allen plastic nut remove it to see the timing marks
Just replaced a timing belt on a 1986 fire bird and its back firing?
you missed your timing marks by at lest 180 degrees do it again. be alert its a fun one to do
How do you time the ignition in a 1986 jetta 8v with a aftermarket flywheel with no timing marks?
I thought that timing was measured off the crank gear and the cam gear. Not the flywheel :P
Where are the timing marks on a 1986 G30 Chevy van?
on the harmonic balancer there is a notch that represents 0 degrees and usually there are also stamped marks indicating degrees of advance and retard
What transmission on a 1986 Chevy p30 motorhome with 454 engine?
That would be the 400 turbo.
Where is the Location of the Fuel filter on a fleetwood moterhome 1986?
Fleetwood doesn't make their own chassis, and they've always offered a wide range of models and classes of motorhome. As is, we don't know if you have a Class A, B, or C motorhome, meaning we don't know what chassis it was built on, and we don't know what the engine is. This info would be necessary in order to answer your question.
Where are the timing marks on an 1986 K-5 Blazer 305 ci?
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.
When do change the timing belt on a 1986 corvette?
there is no timing belt it has a timing chain
What are the ratings and certificates for Spot Marks the X - 1986 TV?
Spot Marks the X - 1986 TV is rated/received certificates of: Iceland:L
