Hello mates,

 

@Wino 

@sepulchrave

 

I am looking to confirm if I am doing the timing right. After taking down the engine due to intake valve bended and replaced, I started to put back everything, and now I am at that part where getting the timing right.

 

So, this is what I had done so far:

 

Installed camshaft and aligned the intake as well as exhaust horizontally.

Cylinder 1 is at TDC

Balance shaft gear circular points are aligned.

 

Note that I do not have the timing special tools for crank and cams, so I made myself one for the camshaft to lock it. As per the crankshaft flywheel I have used a hex allen key. 

 

Now after turning the engine twice, I noticed that camshafts, cylinder 1 is at TDC and shaft gear points are still aligned, the only thing I notice is that when I put my finger in the crankshaft hole I feel that there is a half a dent. When I inserted the hex allen key does not goes all the way.

 

This is my concern, so I would like to make sure everything is fine before putting the rest of the parts, cover, etc.

 

Your help is greatly appreciated.

 

 

 

Are you using a new chain, or the original one?

The original one. It does not to seeing stretch. The tensioners are fine as well. 

 

How about my question regarding the crankshaft hole. 

I don't think you will get all the parts to line up 100% perfectly with an old chain, unless you loosen the cam sprockets from the camshafts and adjust their positions. I certainly would not advise doing that without having everything locked in position with the correct tools and using an appropriate counterhold tool on the sprockets.

If you consider where the alignment hole is on the flywheel (distance from axis) you can probably calculate the misalignment angle you have, and maybe decide it is insignificant.

Look at pictures of the flywheel on ebay/google to see the hole position on the flywheel back.

You won't improve the timing, if, as you say the timing has shifted slightly after turning the engine over twice then this is down to chain stretch and unless you have a vernier sprocket you won't be able to get it perfect.

The cam sprockets aren't keyed to the camshafts, so you do effectively have infinite adjustment.

13 minutes ago, Wino said:

The cam sprockets aren't keyed to the camshafts, so you do effectively have infinite adjustment.

 

Ok, but you'd have to move both sprockets exactly the same amount and without degree markings that's practically impossible, too easy to get in a mess and make things worse.

 

I'd leave well alone.

Yeah, as I said, needs the correct locking tools and a counterhold tool before it could be worth considering.   You do it with everything locked, and chain fitted.

Edited 25 February, 20215 yr by Wino

Thanks @Winoand @sepulchravefor your inputs. I am force to buy the locking tools from outside cause the country where I live, Panama, don't sell this special tools.

 

Well, I guess I have to wait another week before finishing the job. 

 

Be well

EW 

 

Are you sure it's worth the added risk to make any changes here? I don't think I would.

Agreed. I rather wait for the locking tools and do the proper timing. 

Two more questions guys. 

 

1. Any recommendation to get a new chain kit? 

 

2. When cylinder 1 is at TDC after using all locking too from crank and cam shafts, do I have to turn the engine and make sure cylinder 2 and then 3 are at up to get it up at compression stroke?

 

I found this tread 

I have a question for you, what went wrong with your engine when only one valve got bent?

2. The slots in the ends of the cams are not quite on the centrelines, so if the locking tools are fitted into those slots and screwed in place, the cams are in the correct positions. If the crank locking tool is fitted, and the balance shaft gear marks are aligned, then the crank is also in the correct position.

Look closely at the cam end slots and you will see that there are two different positions they can be in and still both be horizontal and aligned to each other; the correct position is when the slots are both above the centrelines of the shafts, rather than below.  This is the only position where the locking tools will fit and can be screwed in place with the same screws that held the covers on.

In answer to your questions:

 

1. It would be a very good idea to replace the chain while you have it in bits.

 

2. No.

@wino thanks for your inputs. I will definitely keep that important in mind. 

 

@sepulchrave I had six intake valve bent, so I have to rebuild the engine. I am also getting a new chain kit as per your recommendation.