Valves.... ugh

scampbel98 · Post by **scampbel98** » Tue Sep 01, 2015 8:32 pm

Well I think I found the source of the clatter.....
Exhaust Valves clearance....
0.021
0.024
0.023
0.023

So Cal Mark · Post by **So Cal Mark** » Tue Sep 01, 2015 10:35 pm

tighten them up and your car will run much better. I'd check the intake too

scampbel98 · Post by **scampbel98** » Wed Sep 02, 2015 12:12 am

Intake isn't much better - and one really bad
0.021
0.031
0.020
0.019

0.031... i think i need to yell at the guy who put my heads together

bradartigue · Post by **bradartigue** » Thu Sep 03, 2015 11:22 am

You are measuring with the engine cold, yes? If so you likely have open valves when hot...yeah I'd talk to the mechanic about how to use a feeler gauge.

I guess mechanics don't have to use feeler gauges any more.

scampbel98 · Post by **scampbel98** » Thu Sep 03, 2015 12:02 pm

Brad.... Those were warm measurements.... !!!!

bradartigue · Post by **bradartigue** » Thu Sep 03, 2015 2:41 pm

What are the cold measurements?

scampbel98 · Post by **scampbel98** » Thu Sep 03, 2015 8:18 pm

Brad

Cold Intake
1. 0.018
2. 0.019
3. 0.032 (yup)
4. 0.017

bradartigue · Post by **bradartigue** » Thu Sep 03, 2015 9:42 pm

Maybe I'm too tired, but the gap is getting smaller with a cold motor? Makes no sense. The gaps should get smaller when the engine heats...anyway, if those are your cold readings then they are more or less in spec except for #3.

scampbel98 · Post by **scampbel98** » Fri Sep 04, 2015 12:11 am

I picked up some new gauges as the old ones were pretty ratty and corroded. Took a little more time make sure lobes were perpendicular to the buckets...

scampbel98 · Post by **scampbel98** » Mon Sep 07, 2015 11:43 am

Hey Brad....
So I've become pretty good at getting the shims out... so far most all of them have been in thru 4.10-4.25 range... and I need to go bigger to shorten the gaps. Those seem relatively thick already. I'm wondering if my head guy shaved too much on the rebuild? As I understand it, if the valves recess a bit with age and mileage, my gaps should decrease???

If you shave thru cam towers or use a thinner gasket..... you'd have a reduced overall set of gaps?

Or do I just build up this practically new 32702281 FI bare head I have????

fiatfactory · Post by **fiatfactory** » Mon Sep 07, 2015 12:51 pm

bradartigue · Post by **bradartigue** » Mon Sep 07, 2015 7:42 pm

scampbel98 wrote:Hey Brad....
So I've become pretty good at getting the shims out... so far most all of them have been in thru 4.10-4.25 range... and I need to go bigger to shorten the gaps. Those seem relatively thick already. I'm wondering if my head guy shaved too much on the rebuild? As I understand it, if the valves recess a bit with age and mileage, my gaps should decrease???

If you shave thru cam towers or use a thinner gasket..... you'd have a reduced overall set of gaps?

Or do I just build up this practically new 32702281 FI bare head I have????

Gaps will decrease over time.

Are you using a stock camshaft?

Shims are okay to about 500, then you need to think about whats wrong.

So Cal Mark · Post by **So Cal Mark** » Mon Sep 07, 2015 7:53 pm

shaving the cam boxes is not a good idea, if you do plan to install adjustable cam gears

scampbel98 · Post by **scampbel98** » Mon Sep 07, 2015 8:08 pm

AFAIK they're stock cams. I've got a couple of heads I've collected, most of the shims from those are in the 3.9 - 4.02 range. Good to know on the max shim range. Just realized today i need a better accuracy micrometer. My digital one only goes to 100ths... e.g. 4.99....

fiatfactory · Post by **fiatfactory** » Mon Sep 07, 2015 11:36 pm

Valves.... ugh

Valves.... ugh

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