Valvetrain Question
11-29-2009, 04:52 PM
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Valvetrain Question K im doing a cam swap here in the next few days and i want to make sure i have everything. Tool wise im good to go but i wanted to see if you guys recommend anyhting else. So what i have is the cam, the new springs, pushrods, and new oil pump. I have gaskets and oil and that stuff.
Do you guys think i should change the rockers while im doing everyhting? I have heard that the stock rockers and push rods flex under higher rpms losing power.
Do you guys think i should change the rockers while im doing everyhting? I have heard that the stock rockers and push rods flex under higher rpms losing power.
11-29-2009, 05:29 PM
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I am not a cam guru, but depending on the size of the cam, your rollers and pushrods could begin to fatigue and fail after awhile. Going with a better aftermarket setup isn't a bad idea if you have the spare change to do it.
11-29-2009, 05:31 PM
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Pick up a thicker Oil pump o ring.. You prolly won't thank me later unless you go through DAYS of frustrating diagnosis to find a lifter tick that won't go away.
Thicker oil pump o-ring GM# 12557752
The stock rockers are ok, but they do put a bit of a side load on the valve stem, which can cause valve guide wear on the heads.. But it's your dollar.. If I had the money I'd do it, but that's me.
And don't reuse the stock pushrods.. Just get new ones along with a pushrod length checker to make sure you order the right length. the checker is a bit of a pain to use, but worth it to get the right measurement.
Oh, and buy a new crank bolt.. Pick up an ARP one that you can re-use. The stockers are a one-use deal.
Thicker oil pump o-ring GM# 12557752
The stock rockers are ok, but they do put a bit of a side load on the valve stem, which can cause valve guide wear on the heads.. But it's your dollar.. If I had the money I'd do it, but that's me.
And don't reuse the stock pushrods.. Just get new ones along with a pushrod length checker to make sure you order the right length. the checker is a bit of a pain to use, but worth it to get the right measurement.
Oh, and buy a new crank bolt.. Pick up an ARP one that you can re-use. The stockers are a one-use deal.
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11-29-2009, 08:29 PM
#11
Pick up a thicker Oil pump o ring.. You prolly won't thank me later unless you go through DAYS of frustrating diagnosis to find a lifter tick that won't go away.
Thicker oil pump o-ring GM# 12557752
The stock rockers are ok, but they do put a bit of a side load on the valve stem, which can cause valve guide wear on the heads.. But it's your dollar.. If I had the money I'd do it, but that's me.
And don't reuse the stock pushrods.. Just get new ones along with a pushrod length checker to make sure you order the right length. the checker is a bit of a pain to use, but worth it to get the right measurement.
Oh, and buy a new crank bolt.. Pick up an ARP one that you can re-use. The stockers are a one-use deal.
Thicker oil pump o-ring GM# 12557752
The stock rockers are ok, but they do put a bit of a side load on the valve stem, which can cause valve guide wear on the heads.. But it's your dollar.. If I had the money I'd do it, but that's me.
And don't reuse the stock pushrods.. Just get new ones along with a pushrod length checker to make sure you order the right length. the checker is a bit of a pain to use, but worth it to get the right measurement.
Oh, and buy a new crank bolt.. Pick up an ARP one that you can re-use. The stockers are a one-use deal.
11-29-2009, 09:48 PM
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You'll for sure be okay with the stock rockers as long as everything looks okay.
I would ask TSP about their O-ring size and a new timing chain can never hurt.
I would ask TSP about their O-ring size and a new timing chain can never hurt.
11-30-2009, 05:25 AM
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IIRC, my buddy had the TSP O-ring and that was the one we were having problems with. The larger GM O-Ring is visually beefier. I ordered three of em for my last cam swap and I still have two left. Just in case I pinched one of em.
We also made a 'custom' wrench for the oil pump pickup tube bolt. Ground down a 10mm box end of the wrench to a taper so it can sneak under the oil pan edge and get to the bolt. -Real pain, but the custom wrench helped a lot!
We also made a 'custom' wrench for the oil pump pickup tube bolt. Ground down a 10mm box end of the wrench to a taper so it can sneak under the oil pan edge and get to the bolt. -Real pain, but the custom wrench helped a lot!
12-01-2009, 10:17 AM
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It sounds like you're not afraid to spend a little bit more money to get the job done right, kudos to you. Too many people try to cut corners and then wonder why they bent their pushrods after 1000 miles of driving.
Spend a little bit more, take your time, and make sure its done right the first time so there won't be a second time!
Spend a little bit more, take your time, and make sure its done right the first time so there won't be a second time!
