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rocker ard torque specs 

 

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 Post subject: rocker ard torque specs
Posted: Sat Jul 01, 2006 12:13 am 
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After fitting new 2031 cam and springs to suit, i have a couple of noisey lifters. took rocker covers off and reset all rockers(zero lash then half to full turn). still have noisy valve train. Does anyone know the torque spec for the rockers on a 2002 5lrt. does anyone have any thoughts?
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chris

 

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Posted: Sat Jul 01, 2006 12:42 am 
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The std rockers are pedastal mount, they dont "adjust" lifter preload like the stud mount ones.

Do you have some aftermarket rockers? If not, you'll need some longer pushrods on those that are noisy to get the correct lifter preload (.020" to 060")
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Posted: Sat Jul 01, 2006 12:57 am 
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Just do the f**k up tight!!!! :lol:
Sorry chris but I am a bit p****d!! :twisted:

 

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Posted: Sat Jul 01, 2006 12:59 am 
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xr8ute, there the normal set up with non-adjustable yella-terra 1.72 r.r. I realise there is no adj, but just wondering if over tightening can cause lifters to collapse and start ticking its a*** off. Do you think i should try new lifters before changing pushrod lenght?
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Posted: Sat Jul 01, 2006 10:14 am 
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25-35nm
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Posted: Sat Jul 01, 2006 11:52 am 
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If you have non adjustables then bring each cyl to TDC and tighten them down till you get contact, if you find that you're bolting them down and the slack isn't taken up (Which i doubt with a new billet) then you have a problem somewhere.
How long did you run the engine for?
The lifters could have bled down so take it for a drive and get them pumped up.
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Posted: Sat Jul 01, 2006 2:38 pm 
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veeate, there all around 30nm mark
walker, i took it for a 20km spin and they did quiet down alot but there is still 1 or 2 that are a bit rattly, so this morning got some wynns engine flush stuff ( never really one for additives)and chucked it in and ran motor for 30mins, dopped oil and changed filter. I use sae20w-50 gt titan oil(fuchs product). did seem to quiet it done initailly but after a good run they started to rattle a bit again. Next step i think is to check oil pressure with gauge and if thats ok then i will have to try new friggen lifters(another 300bucks)? Help :!: am i heading in the right direction? :?
chris

 

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Posted: Sat Jul 01, 2006 2:57 pm 
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To be honest i think 20w-50 is too thick for it, they recommend 10w-30 for std models and 15w-40 for XR8 and LPG.
I put 20/50 in my EF once and it started ticking, just too thick for it... i went back to a 15/40 and had no probs after that.
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Posted: Sat Jul 01, 2006 3:13 pm 
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Walker, yeah i see were your coming from, ive only changed to that oil since cam change because of a local dealer recomendation. I used to run mobil one oil in past with no probs ,only changed due to needed to use non synthetic oil for cam run in as stated by cranecams recommendations for run in. I should have chosen a lighter weight oil by sounds-bugger :evil: Goin to shoot into town to see if any place is open and get 15w-40 oil and give it a go. this will be the cleanest friggen engine around - two oil changes in 60kms :twisted:
chris

 

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Posted: Sat Jul 01, 2006 3:32 pm 
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Hehe it certainly will, and it's definately worth a try, it's a cheap alternative to changing lifters that's for sure.
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Posted: Sat Jul 01, 2006 4:17 pm 
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It's likely you might need longer push rods. Both my brother and I needed them when fitting a 2031 and the same RRs as you. I have heard of a few people getting away with stock rods but not many. Lifters don't bugger up just because you change your cam. I'd be removing my manifold, pulling apart the lifters and giving them a good clean and then checking your rod length.

20W50 is fine depending on your engine - there isn't a one oil fits all. You might need something different but don't just discount this one because it isn't written in some wanky book. Manufacturers specs... pfftt. Everyone knows the best thing for your engine isn't necessarily at the top of Fords agenda (or any manufacturer for that matter). Experiment with quality oils over the next few months - in the long run oil is cheap so take try a few to ensure you've got the right oil for YOUR engine.
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Posted: Sat Jul 01, 2006 4:38 pm 
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cheers for info free347. I was hoping someone would have had same situation with this 2031 cam(seem to be popular cam), makes bloody good sense. Can you buy them in 10 thou increments or something? what was the extra measurement for your engine? are they pricey?
I bought some 5w-40 shell fully synthetic oil, not much choice on a saturday in bordertown. dunno know now if should try it or not! :?
Chris

 

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Posted: Sat Jul 01, 2006 6:18 pm 
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To be honest I can remember it was too long ago. You can buy an adjustable rod to effectively measure the length rod you need (or have someone do this for you). A decent set of one piece (hardened too, though not essential) will set you back a few hundred dollars. I know this is 'approaching' the price of new lifters however you don't want to find yourself buying new lifters and STILL needing longer rods. Always best to have them checked.

What rockers are you using? How is your geometry... did you check it?
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Posted: Sat Jul 01, 2006 7:17 pm 
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yeah i see ya point, rather check and get the right lenght rod first and claen up original lifters before new lifters.
running YELLA TERRA 1.72 roller rokers and no i didnt check geometry as read so much pos feed back about 2031, thought it would be ok. woops :lol:

 

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Posted: Sat Jul 01, 2006 7:27 pm 
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2031 is a great choice... geometrey is a seperate issue.

Not the most scientific but good enough for us street hacks... colour the top of the valve stem with a black Niko, refit your rocker, turn the engine over by hand a few time and check to see where the wear mark is. One sign of a short rod will be the wear mark biased toward the outer side of the valve tip.
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