Engine Overview/Reflection

When us students came back from semester break, we were each partnered with a person and given each a motor to work on. So what happened was that each of us worked on a different part of the engine e.g: when i work on the engine, my buddy will work on the head block

After the engine block, I moved onto the engine head block and worked on that also. Same as the engine block i had to dismantle components from the block, but this time, I removed:

4 Valves (2 inlet and 2 exhaust)

4 Valve springs (2 inlet, 2 exhaust)

8 Valve collets (2 per valve which lock the valve keeper onto the valve)

6 Retainers (1 for each exhaust valve, and two for each inlet valve)

After the dismantling, I started to record some measurements, such as:

. The taper ovality of the valve guides. (any ware caused by the valve movement)

. The engine head warp. (warp is where the block would have changed shape slightly due to temperature changes)

. The valve stem warp. (measuring 3 different places down the valve stem to check for any bending)

. Working out the clearance between the valve stem and the valve guide. (this is done by taking the measurement of the valve thickness and the measurement from the valve guide, and misusing the valve stem measurement from the valve guide measurement)

. Checked the valve seat and angle.

. Checking the sureness of the valve spring. (this is done by lining the spring up with a square and using a vernier calliper to do the measurements)

. Checked the length of the valve spring.

. Checking the valve height when installed by removing the spring and using a vernier calliper to to place on the spring seat and bring the body up to the height of the keeper

. Checking the spring tension with and without the retainer.

. Calculate the lift of each camshaft lobe in millimetres

. Checking the taper ovality of the camshaft bearing journals.

. Checking the camshaft bearing run out by using a DTI gauge.

. Checking the clearance of the bearing oil clearance by using a plastigauge.

. Checking the cam pad thickness and clearance when installed.

Then after all this i put all the components back into the camshaft head and then me and my buddy pit the engine back together and timed it up accordingly.