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  '64 1/2 to '73 -- The Classic Mustang
  Checking valve to piston clearance

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Author Topic:   Checking valve to piston clearance
Red65
Journeyman

Posts: 87
From: Northglenn, CO, USA
Registered: Jul 2002

posted 01-17-2003 09:13 PM     Click Here to See the Profile for Red65   Click Here to Email Red65     Edit/Delete Message   Reply w/Quote
I was going to do the old clay-on-the-piston method for checking valve clearance, but I don't have a solid lifter. I've read that you can make one from a hydraulic lifter by taking it apart and filling it with washers. For some reason, I'd rather not do this to my brand new roller lifters.

Has anyone done this to their new lifters? Or should I switch to another method, such as installing checking springs and measuring available lift per degree of rotation?

Or can someone save me the trouble and verify that a Comp 284RF retro-roller will work with Edelbrock 1.90 heads and stock pistons (with reliefs)?

BTW, thanks to this site, I've rediscovered my passion for working on the Mustang. Of course, my wallet realizes this also.

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capri man
Gearhead

Posts: 3762
From: doerun, ga.
Registered: Nov 2000

posted 01-17-2003 09:47 PM     Click Here to See the Profile for capri man   Click Here to Email capri man     Edit/Delete Message   Reply w/Quote
personally i would install the checking springs and use a dial caliper to measure the clearance. that is if the engine is assenbled. just my opinion, i could be wrong. good luck

------------------
mike r
racing is real
everything else is just a game.
81 capri-7.51 @89mph 1/8
1.54 60 ft.
http://prestage.com/site/site_display.asp?SiteID=141

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RADRIDE
Gearhead

Posts: 252
From: Va.Beach, Va.
Registered: Aug 2002

posted 01-19-2003 06:11 PM     Click Here to See the Profile for RADRIDE   Click Here to Email RADRIDE     Edit/Delete Message   Reply w/Quote
I agree with the soft springs. Clay can give a false reading.Can you say 10 bent valves in my new AFR heads.Just make sure you check all the way through cam travel.

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V8 Thumper
Gearhead

Posts: 3603
From: Orange, Ca. United States of America
Registered: Dec 2001

posted 01-19-2003 06:33 PM     Click Here to See the Profile for V8 Thumper   Click Here to Email V8 Thumper     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by RADRIDE:
Just make sure you check all the way through cam travel.

...with zero lash as an extra safety margin

------------------
1965 GT coupe, 333ci aluminum headed/solid cammed stroker, four speed, 3.70:1 9"

All Blue Oval, no blue bottle
http://mustangsandmore.50megs.com/V8Thumper.html

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Red65
Journeyman

Posts: 87
From: Northglenn, CO, USA
Registered: Jul 2002

posted 01-19-2003 06:41 PM     Click Here to See the Profile for Red65   Click Here to Email Red65     Edit/Delete Message   Reply w/Quote
I went ahead and took apart two lifters and dropped in some clean 1/4" sockets to fill the gap, and reassembled them to make solid checking lifters.

I clayed the pistons this morning, and it looks like I've got roughly .100 clearance without a gasket) so I should be ok, but since reading Radride's response, I'm going to go the checking spring route also.

Thanks for the feedback!!

------------------
'65 Fastback

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