The Ford Barn

JtownJoe · 12-30-2012, 09:12 PM

Checking the valve lash and on the spec's of .13 int. & .15 exh. all mine are .12 int. & .13 exh. Is that really important enough to try to correct or close enough for all practical purposes?

mpalilonis · 12-30-2012, 09:20 PM

That is close enough, as the metal warms up it will expand some and make up a bit of the distance. If you could get the exhaust closer it would be better, if not then it will work.

dave in australia · 12-31-2012, 12:22 AM

A wider gap is of no detriment, except it is a bit noisier. But a too narrow gap, and when everything warms up, the valves will not seat properly, and this may give you problems in the future.

bgarrett · 12-31-2012, 12:32 AM

My babbitt pourer guy gets hysterical if its not .015

George Miller · 12-31-2012, 08:40 AM

Quote:

Originally Posted by JtownJoe

Checking the valve lash and on the spec's of .13 int. & .15 exh. all mine are .12 int. & .13 exh. Is that really important enough to try to correct or close enough for all practical purposes?

Just right is great.
To tight is bad, if you run your engine hard, or climbing some big hills. Good by exhaust valve.
To loose is better than to tight. I always adjust valves on the loose side. After a new valve job they will wear in the seat a little.

Mitch//pa · 12-31-2012, 08:50 AM

Sponsored Links (Register now to hide all advertisements)

Put it right to spec.

JtownJoe · 12-31-2012, 09:12 AM

I guess the consensus is right on or OK, slightly on the looser side but no go at 1 or 2 thousands on the tighter side. I'll just have to buy a couple of wrenches to grind down thin enough to use together & loosen em' up. Thanx for all the input!

western77 · 01-02-2013, 08:24 PM

.13 and .12 are way to loose. Try .013 and .015 and you will be in the ballpark! JB

Russ/40 · 01-03-2013, 01:55 AM

Quote:

Originally Posted by western77

.13 and .12 are way to loose. Try .013 and .015 and you will be in the ballpark! JB

You mean too tight.

I would leave the intakes alone, they are fine. Try to get the exhausts a bit looser, like the .015" spec.

Tom Wesenberg · 01-03-2013, 02:09 AM

Russ, notice the decimal and zero.
.13 vs .013
.13 would be 10 times the gap of .013

BILL WILLIAMSON · 01-03-2013, 03:32 AM

Quote:

Originally Posted by Tom Wesenberg

Russ, notice the decimal and zero.
.13 vs .013
.13 would be 10 times the gap of .013

Yup,
And my engine rebuilder's brass placque reads: BORE-.010 It's really .100 BORE! He must have flunked MATH! I only flunked GIRLS! Bill W.

Tom Wesenberg · 01-03-2013, 08:53 AM

It's an easy mistake, and since I knew what was meant I didn't even notice the ommision of the zero until Western 77 mentioned it in post 8.

Patrick L. · 01-03-2013, 10:59 AM

The intake lash seems fine. The exhaust could be a bit looser. I seem to remember something about them having exhaust valve burning issues and the lash was increased to .020-.022" on the B engines [which had a slightly different camshaft]. I guess most fellas run the exhausts at .015-.018" which seems to work fine. If I'm wrong, it'll be corrected, and, rightly so.

Purdy Swoft · 01-03-2013, 01:25 PM

I run most of mine at .016 , intake and exhaust. With a little noise it'll keep its poise. Burned valves are no fun to fix.

12-30-2012, 09:12 PM	#1
JtownJoe Senior Member Join Date: May 2010 Location: Johnstown, PA Posts: 342	Valve lash Checking the valve lash and on the spec's of .13 int. & .15 exh. all mine are .12 int. & .13 exh. Is that really important enough to try to correct or close enough for all practical purposes?

12-30-2012, 09:20 PM	#2
mpalilonis Member Join Date: Dec 2010 Location: Philadelphia, Pa Posts: 62	Re: Valve lash That is close enough, as the metal warms up it will expand some and make up a bit of the distance. If you could get the exhaust closer it would be better, if not then it will work.

12-31-2012, 12:22 AM	#3
dave in australia Senior Member Join Date: May 2010 Location: Victoria, Australia Posts: 1,176	Re: Valve lash A wider gap is of no detriment, except it is a bit noisier. But a too narrow gap, and when everything warms up, the valves will not seat properly, and this may give you problems in the future.

12-31-2012, 12:32 AM	#4
bgarrett Senior Member Join Date: Jul 2010 Posts: 243	Re: Valve lash My babbitt pourer guy gets hysterical if its not .015

12-31-2012, 08:50 AM	#6
Mitch//pa BANNED Join Date: May 2010 Location: Bucks County, PA Posts: 11,454	Re: Valve lash Sponsored Links (Register now to hide all advertisements) Put it right to spec.

12-31-2012, 09:12 AM	#7
JtownJoe Senior Member Join Date: May 2010 Location: Johnstown, PA Posts: 342	Re: Valve lash I guess the consensus is right on or OK, slightly on the looser side but no go at 1 or 2 thousands on the tighter side. I'll just have to buy a couple of wrenches to grind down thin enough to use together & loosen em' up. Thanx for all the input!

01-02-2013, 08:24 PM	#8
western77 Senior Member Join Date: Jul 2010 Location: Grand Rapids Mi Posts: 168	Re: Valve lash .13 and .12 are way to loose. Try .013 and .015 and you will be in the ballpark! JB

01-03-2013, 02:09 AM	#10
Tom Wesenberg Senior Member Join Date: May 2010 Location: Mpls, MN Posts: 27,582	Re: Valve lash Russ, notice the decimal and zero. .13 vs .013 .13 would be 10 times the gap of .013

01-03-2013, 08:53 AM	#12
Tom Wesenberg Senior Member Join Date: May 2010 Location: Mpls, MN Posts: 27,582	Re: Valve lash It's an easy mistake, and since I knew what was meant I didn't even notice the ommision of the zero until Western 77 mentioned it in post 8.

01-03-2013, 10:59 AM	#13
Patrick L. Senior Member Join Date: May 2010 Location: Largo Florida Posts: 7,225	Re: Valve lash The intake lash seems fine. The exhaust could be a bit looser. I seem to remember something about them having exhaust valve burning issues and the lash was increased to .020-.022" on the B engines [which had a slightly different camshaft]. I guess most fellas run the exhausts at .015-.018" which seems to work fine. If I'm wrong, it'll be corrected, and, rightly so.

01-03-2013, 01:25 PM	#14
Purdy Swoft Senior Member Join Date: May 2010 Location: Alabama Posts: 8,099	Re: Valve lash I run most of mine at .016 , intake and exhaust. With a little noise it'll keep its poise. Burned valves are no fun to fix.