Vslve clearances

[arcturus b]

Hi,i am about to receive my replacement cylinder head and am thinking about valve clearances. I. Have had various pieces of advice as to setting clearance , hot, cold, with hushers fitted, without. Etc. What is the definitive methode?

 

[Radtap]

Cold no hushers

 

[arcturus b]

Cold no hushers

So i can do this all on the bench before fitting head to block. Fix cam to head and check gaps. Order shims as necessary. dissasemble and fit hushers. shim up With new shims as necessary and fit head to block. Does that sound like a good plan?

Cold no hushers

 

[dl242gt]

I just make sure the hushers get flattened by a few cam rotations. Then you can accurately check clearance with the hushers in there.

 

[culberro]

I just make sure the hushers get flattened by a few cam rotations. Then you can accurately check clearance with the hushers in there.

You have to be careful with that. If the valves get tipped/shortened when a head is rebuilt the hushers will push a lot harder and throw off your clearance checks.


If you want to use the hushers:
You can set the valve clearance on the bench with no hushers, then pull the cam and install the hushers. Then install the head. Usually easier than when it’s in the car.

I don’t use hushers though. Just set the lash a bit tighter and it’ll be pretty quiet.

 

[2manyturbos]

You have to be careful with that. If the valves get tipped/shortened when a head is rebuilt the hushers will push a lot harder and throw off your clearance checks.


If you want to use the hushers:
You can set the valve clearance on the bench with no hushers, then pull the cam and install the hushers. Then install the head. Usually easier than when it’s in the car.

I don’t use hushers though. Just set the lash a bit tighter and it’ll be pretty quiet.

It's impossible to get accurate clearance readings with new hushers in place.

 

[culberro]

It's impossible to get accurate clearance readings with new hushers in place.

You can sort of push them down with the hook depressor and get a good feel for it, but it’s sort of hand wavy.

 

[arcturus b]

Hi,i am about to receive my replacement cylinder head and am thinking about valve clearances. I. Have had various pieces of advice as to setting clearance , hot, cold, with hushers fitted, without. Etc. What is the definitive methode?

My "hand book" gives 0.35_0.50 mm inlet and 0.40-0.45 exhaust. Other sources give 0.30-0,40 mm for both. Which is best?

 

[culberro]

@arcturus b
For original engine and cams, set at 0.3mm-0.4mm, adjust when they’re at 0.5+mm or 0.2mm or less. I tend to set them all at 0.3mm or so as they’re lighter are quieter.

Intake and exhaust.