Re: Ranger valve timing question

Ranchaero Wing Shop · Sat Aug 11, 2018 10:41 pm

'Hi Everyone,

While dealing with my leaky cam housing cover and loose studs...

With the cam housing cover off, it seemed a good time to check valve
clearances. They were not too good. Charles happened along and reminded
me the intake clearances are .030", not .015" like the manuals say. I
set them all to .030".

Then I thought, "How about valve timing?" First I set #1 valve
clearances temporarily to .015" per the Overhaul Manual before
measuring. Intake opens about 9-10 deg. BTDC where it should be 15.
That's 5-6 degrees late. Exhaust closes 14-15 degrees late. So intake
is 5-6 deg late and exhaust 14-15 deg late. My Overhaul Manual says to
'balance' intake and exhaust errors which I assume means 'split the
difference', AND they should be within 2 degrees. It seems obviously
impossible to get both within 2 degrees. The best I can do according to
my rough calcs is to set intake about 5 degrees early and exhaust about
5 degrees late. (split the difference) There must be something here I'm
missing! I'd appreciate any advice I can get from you guys on valve timing.

Next question, I need to loosen the cam gear and turn it a few notches,
but unfortunately the nut is on quite tight. Is there a nice way to hold
the cam from turning without removing it from the engine?

Thanks guys,

David'

Curt Kinchen · Post by **Curt Kinchen** » Sun Aug 12, 2018 1:00 am

'With the vertical drive shaft engaged with the camshaft gear, holding the prop will prevent the camshaft from rotating while loosening the camshaft nut.

On Sat, Aug 11, 2018 at 9:34 PM, Ranchaero Wing Shop david@ranchaerowingshop.com [fairchildclub] wrote:

Hi Everyone,

While dealing with my leaky cam housing cover and loose studs...

With the cam housing cover off, it seemed a good time to check valve
clearances. They were not too good. Charles happened along and reminded
me the intake clearances are .030", not .015" like the manuals say. I
set them all to .030".

Then I thought, "How about valve timing?" First I set #1 valve
clearances temporarily to .015" per the Overhaul Manual before
measuring. Intake opens about 9-10 deg. BTDC where it should be 15.
That's 5-6 degrees late. Exhaust closes 14-15 degrees late. So intake
is 5-6 deg late and exhaust 14-15 deg late. My Overhaul Manual says to
'balance' intake and exhaust errors which I assume means 'split the
difference', AND they should be within 2 degrees. It seems obviously
impossible to get both within 2 degrees. The best I can do according to
my rough calcs is to set intake about 5 degrees early and exhaust about
5 degrees late. (split the difference) There must be something here I'm
missing! I'd appreciate any advice I can get from you guys on valve timing.

Next question, I need to loosen the cam gear and turn it a few notches,
but unfortunately the nut is on quite tight. Is there a nice way to hold
the cam from turning without removing it from the engine?

Thanks guys,

David

--
Curt Kinchen
ptcurt@gmail.com '

Ranchaero Wing Shop · Post by **Ranchaero Wing Shop** » Sun Aug 12, 2018 1:41 am

' I considered that but worry about putting all that pressure on the gears. No?

On 08/12/2018 12:00 AM, Curt Kinchen ptcurt@gmail.com [fairchildclub] wrote:

With the vertical drive shaft engaged with the camshaft gear, holding the prop will prevent the camshaft from rotating while loosening the camshaft nut.
On Sat, Aug 11, 2018 at 9:34 PM, Ranchaero Wing Shop david@ranchaerowingshop.com [fairchildclub] wrote:

Hi Everyone,

While dealing with my leaky cam housing cover and loose studs...

With the cam housing cover off, it seemed a good time to check valve
clearances. They were not too good. Charles happened along and reminded
me the intake clearances are .030", not .015" like the manuals say. I
set them all to .030".

Then I thought, "How about valve timing?" First I set #1 valve
clearances temporarily to .015" per the Overhaul Manual before
measuring. Intake opens about 9-10 deg. BTDC where it should be 15.
That's 5-6 degrees late. Exhaust closes 14-15 degrees late. So intake
is 5-6 deg late and exhaust 14-15 deg late. My Overhaul Manual says to
'balance' intake and exhaust errors which I assume means 'split the
difference', AND they should be within 2 degrees. It seems obviously
impossible to get both within 2 degrees. The best I can do according to
my rough calcs is to set intake about 5 degrees early and exhaust about
5 degrees late. (split the difference) There must be something here I'm
missing! I'd appreciate any advice I can get from you guys on valve timing.

Next question, I need to loosen the cam gear and turn it a few notches,
but unfortunately the nut is on quite tight. Is there a nice way to hold
the cam from turning without removing it from the engine?

Thanks guys,

David

--
Curt Kinchen
ptcurt@gmail.com

'

johnee35@att.net · Post by **johnee35@att.net** » Sun Aug 12, 2018 2:04 pm

'The correct valve clearance is .015 for intake and .030 for exhaust. From table of limits.
JOHN

Sent from my iPhone

> On Aug 11, 2018, at 11:34 PM, Ranchaero Wing Shop david@ranchaerowingshop.com [fairchildclub] wrote:
>
> Hi Everyone,
>
> While dealing with my leaky cam housing cover and loose studs...
>
> With the cam housing cover off, it seemed a good time to check valve
> clearances. They were not too good. Charles happened along and reminded
> me the intake clearances are .030", not .015" like the manuals say. I
> set them all to .030".
>
> Then I thought, "How about valve timing?" First I set #1 valve
> clearances temporarily to .015" per the Overhaul Manual before
> measuring. Intake opens about 9-10 deg. BTDC where it should be 15.
> That's 5-6 degrees late. Exhaust closes 14-15 degrees late. So intake
> is 5-6 deg late and exhaust 14-15 deg late. My Overhaul Manual says to
> 'balance' intake and exhaust errors which I assume means 'split the
> difference', AND they should be within 2 degrees. It seems obviously
> impossible to get both within 2 degrees. The best I can do according to
> my rough calcs is to set intake about 5 degrees early and exhaust about
> 5 degrees late. (split the difference) There must be something here I'm
> missing! I'd appreciate any advice I can get from you guys on valve timing.
>
> Next question, I need to loosen the cam gear and turn it a few notches,
> but unfortunately the nut is on quite tight. Is there a nice way to hold
> the cam from turning without removing it from the engine?
>
> Thanks guys,
>
> David
>
>
>
> ------------------------------------
> Posted by: Ranchaero Wing Shop
> ------------------------------------
>
>
> ------------------------------------
>
> Yahoo Groups Links
>
>
>

'

Ranchaero Wing Shop · Post by **Ranchaero Wing Shop** » Sun Aug 12, 2018 6:24 pm

' Yes, all the manuals say .015. However I've heard it several times on this list that it should actually be .030. Not so? There seems to be some controversy on this subject.

Also, am I being overly paranoid to be afraid to put pressure on the cam gears to get that cam gear nut loose? I'd hate to break a gear. After working on the cam cover studs, maybe I am a bit paranoid about breaking something.

David

On 08/12/2018 01:04 PM, 'johnee35@att.net' johnee35@att.net [fairchildclub] wrote:

The correct valve clearance is .015 for intake and .030 for exhaust. From table of limits.
JOHN

Sent from my iPhone

> On Aug 11, 2018, at 11:34 PM, Ranchaero Wing Shop david@ranchaerowingshop.com [fairchildclub] fairchildclub@yahoogroups.com wrote:
>
> Hi Everyone,
>
> While dealing with my leaky cam housing cover and loose studs...
>
> With the cam housing cover off, it seemed a good time to check valve
> clearances. They were not too good. Charles happened along and reminded
> me the intake clearances are .030", not .015" like the manuals say. I
> set them all to .030".
>
> Then I thought, "How about valve timing?" First I set #1 valve
> clearances temporarily to .015" per the Overhaul Manual before
> measuring. Intake opens about 9-10 deg. BTDC where it should be 15.
> That's 5-6 degrees late. Exhaust closes 14-15 degrees late. So intake
> is 5-6 deg late and exhaust 14-15 deg late. My Overhaul Manual says to
> 'balance' intake and exhaust errors which I assume means 'split the
> difference', AND they should be within 2 degrees. It seems obviously
> impossible to get both within 2 degrees. The best I can do according to
> my rough calcs is to set intake about 5 degrees early and exhaust about
> 5 degrees late. (split the difference) There must be something here I'm
> missing! I'd appreciate any advice I can get from you guys on valve timing.
>
> Next question, I need to loosen the cam gear and turn it a few notches,
> but unfortunately the nut is on quite tight. Is there a nice way to hold
> the cam from turning without removing it from the engine?
>
> Thanks guys,
>
> David
>
>
>
> ------------------------------------
> Posted by: Ranchaero Wing Shop david@ranchaerowingshop.com
> ------------------------------------
>
>
> ------------------------------------
>
> Yahoo Groups Links
>
>
>

'

Ranchaero Wing Shop · Post by **Ranchaero Wing Shop** » Mon Aug 13, 2018 8:02 pm

' Thanks Curt. That worked (and didn't break anything) haha!

David

On 08/12/2018 12:00 AM, Curt Kinchen ptcurt@gmail.com [fairchildclub] wrote:

With the vertical drive shaft engaged with the camshaft gear, holding the prop will prevent the camshaft from rotating while loosening the camshaft nut.
Reply via web post • ptcurt@gmail.com?subject=Re%3A%20%5Bfairchildclub%5D%20Ranger%20valve%20timing%20question • fairchildclub@yahoogroups.com?subject=Re%3A%20%5Bfairchildclub%5D%20Ranger%20valve%20timing%20question • Start a New Topic • Messages in this topic (2) Have you tried the highest rated email app? With 4.5 stars in iTunes, the Yahoo Mail app is the highest rated email app on the market. What are you waiting for? Now you can access all your inboxes (Gmail, Outlook, AOL and more) in one place. Never delete an email again with 1000GB of free cloud storage. .

'

Curt Kinchen · Post by **Curt Kinchen** » Mon Aug 13, 2018 9:44 pm

'Woohoo!

Curt Kinchen

On Aug 13, 2018, at 6:37 PM, Ranchaero Wing Shop david@ranchaerowingshop.com [fairchildclub] wrote:

Thanks Curt. That worked (and didn't break anything) haha!

David

On 08/12/2018 12:00 AM, Curt Kinchen ptcurt@gmail.com [fairchildclub] wrote:
With the vertical drive shaft engaged with the camshaft gear, holding the prop will prevent the camshaft from rotating while loosening the camshaft nut.
Reply via web post • ptcurt@gmail.com?subject=Re%3A%20%5Bfairchildclub%5D%20Ranger%20valve%20timing%20question • fairchildclub@yahoogroups.com?subject=Re%3A%20%5Bfairchildclub%5D%20Ranger%20valve%20timing%20question • Start a New Topic • Messages in this topic (2)

Have you tried the highest rated email app? With 4.5 stars in iTunes, the Yahoo Mail app is the highest rated email app on the market. What are you waiting for? Now you can access all your inboxes (Gmail, Outlook, AOL and more) in one place. Never delete an email again with 1000GB of free cloud storage. .

'