If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
valvetrain problem?
today i adjusted all of my valves... last time since i did it was
about 5000 miles ago. i found that 13/16 of the rockers were pretty loose - in the sense that the pushrods were easily turnable in their place. i don't think this is normal for the preload to come undone after only 5k miles, is it? i remember in my notes that i went around and gave each of them a 1/2 turn preload. am i doing something wrong, or could there be something else i'm missing? is it just backing off really fast? i was thinking i could back a second nut on top of the rocker nut to help keep it tightened down... other than that, there's also this: it also gets noisier whenever i an either decelerating with my foot off the gas, or when i am cruising with no load on the engine (i.e. not trying to accelerate). opinions? 400 sbc, hydraulic cam. thanks! |
Ads |
#2
|
|||
|
|||
Gerard wrote:
> > today i adjusted all of my valves... last time since i did it was > about 5000 miles ago. > > i found that 13/16 of the rockers were pretty loose - in the sense that > the pushrods were easily turnable in their place. > > i don't think this is normal for the preload to come undone after only > 5k miles, is it? i remember in my notes that i went around and gave each > of them a 1/2 turn preload. > > am i doing something wrong, or could there be something else i'm > missing? is it just backing off really fast? > > i was thinking i could back a second nut on top of the rocker nut to > help keep it tightened down... > > other than that, there's also this: it also gets noisier whenever i an > either decelerating with my foot off the gas, or when i am cruising with > no load on the engine (i.e. not trying to accelerate). > > opinions? > > 400 sbc, hydraulic cam. > > thanks! If you have press-in studs with heavy springs or a high lift cam that causes high pressure to be exerted by the springs, the studs can sometimes start pulling out of the head. Check for this before it's too late! Gerard ASE Master Auto Tech -- Gerard's Automobile Book, Video, and DVD Store http://www.bob2000.com/booksvids.html -------------------------------------------------- Personal Home Page http://www.bob2000.com/4277.htm -------------------------------------------------- I delete old emails. Be sure to quote our previous correspondence! Change the email address to email me |
#3
|
|||
|
|||
hi,
i'm using screw-in studs, i got rid of the press-in studs a short while ago when i did a head swap; i moved to dart II heads with an edelbrock 214 cam. > If you have press-in studs with heavy springs or a high lift cam that causes high pressure > to be exerted by the springs, the studs can sometimes start pulling out of the head. > Check for this before it's too late! > > Gerard > ASE Master Auto Tech |
#4
|
|||
|
|||
Gerard wrote:
> > hi, > > i'm using screw-in studs, i got rid of the press-in studs a short while > ago when i did a head swap; i moved to dart II heads with an edelbrock > 214 cam. > > > If you have press-in studs with heavy springs or a high lift cam that causes high pressure > > to be exerted by the springs, the studs can sometimes start pulling out of the head. > > Check for this before it's too late! > > > > Gerard > > ASE Master Auto Tech If the heads are aluminum, then you may need to make sure the engine is at operating temp before adjustment...I'm not sure of the addition/subtraction for alum heads...maybe someone else here does. Do the nuts give you good resistance to movement when you adjust them? Gerard -- Gerard's Automobile Book, Video, and DVD Store http://www.bob2000.com/booksvids.html -------------------------------------------------- Personal Home Page http://www.bob2000.com/4277.htm -------------------------------------------------- I delete old emails. Be sure to quote our previous correspondence! Change the email address to email me |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
New *FREE* Corvette Discussion Forum | JLA ENTERPRISES TECHNOLOGIES INTEGRATION | Corvette | 12 | November 30th 04 06:36 PM |
87 TBI Suburban bog / acceleration problem | Michael Vosk | 4x4 | 8 | September 29th 04 04:55 AM |
1996 Dodge Intrepid ABS problem | joe | Dodge | 0 | June 16th 04 05:53 PM |
1996 Intrepid ABS problem | joe | Dodge | 0 | May 25th 04 02:45 PM |