Should points be open at TDC?
Theoretically, the points should be just in the process of going from closed to open at #1 TDC. However, it is of no consequence. The timing light is used to adjust that. if you watch the points while you rotate the distributor body, you will see that you can make the points open OR close just be rotating the housing.
Where are the timing pins on a TDC?
The head has a small hole just behind the timing chain on the top. This is where one timing pin will need to go and holds the cam ready for #1 at TDC. There are two “bright” links on the timing chain.
How to synchronise camshaft and crankshaft in a Td5?
The gap needs to be dead central in the hole for the engine to be on TDC #1. When this is lined up, timing sprocket mark at the top, bright links at the top all will be good to put the head back on. When you get the head back on, attached the sprocket and loosely fit the bolts.
How can I tell if my engine is at TDC?
So, after you get the crankshaft (by flywheel indication or by checking actual piston location), check the camshaft sprocket to make sure the camshaft alignment mark is at the TDC position as well. This procedure can be performed by one person. However, it is much easier to perform with two people.
When to set engine to top dead center ( TDC )?
Procedure NOTE When setting the engine to TDC on the compression stroke for cylinder #1, you must realize that the crankshaft rotates twice for every single rotation of the camshaft. So, if you simply set the crankshaft to TDC without looking at the position of the camshaft, you may actually be at TDC on the exhaust stroke for cylinder #1.
How do you check the timing of a flywheel?
If you don’t have a timing window, or if you’re working on the rear cylinder (most HD flywheels don’t have a rear cylinder TDC mark), you need to determine TDC through the spark plug hole. Use something that won’t risk damage, for example a plastic straw works really well.
Is it possible to spot check cam timing?
If you’ve ever installed a set of cams, did your best to line up the marks, and then stood back and scratched your head wondering if they’re right, this article is written for you. Sometimes cam marks leave room for interpretation.
So, after you get the crankshaft (by flywheel indication or by checking actual piston location), check the camshaft sprocket to make sure the camshaft alignment mark is at the TDC position as well. This procedure can be performed by one person. However, it is much easier to perform with two people.
How to spot check timing-hammer performance performance?
So pay close attention to positioning prior to that measurement. If you don’t have a timing window, or if you’re working on the rear cylinder (most HD flywheels don’t have a rear cylinder TDC mark), you need to determine TDC through the spark plug hole. Use something that won’t risk damage, for example a plastic straw works really well.