How to tell if pushrods and guideplates are aligned?
#1
Racer
Thread Starter
How to tell if pushrods and guideplates are aligned?
So I'm in the final stages of assembly on my engine build and I appologize if this has been covered before, but I can't seem to find the info.
I'm not quite sure how to tell if the guide plates are aligned or not?
(Cylinder heads are Promaxx 2180 and has this style of guide plate: https://m.summitracing.com/parts/cca...qycaApm88P8HAQ )
I'm not quite sure how to tell if the guide plates are aligned or not?
(Cylinder heads are Promaxx 2180 and has this style of guide plate: https://m.summitracing.com/parts/cca...qycaApm88P8HAQ )
Last edited by Shdggsdv; 04-18-2017 at 09:53 PM.
#3
Racer
Hey SHDGG,
Firstly, I am probably the last person that should be giving any type of advice regarding head work as I am just going through my first set of 840 heads that have been rebuilt and now I will install them this week.
Anyway, to make a long story short, I was just watching a youtube video last night on the guide plate alignment. It is at about the 38 minute mark.
Not sure if this is relevant to your heads but it may help.
Pete
Firstly, I am probably the last person that should be giving any type of advice regarding head work as I am just going through my first set of 840 heads that have been rebuilt and now I will install them this week.
Anyway, to make a long story short, I was just watching a youtube video last night on the guide plate alignment. It is at about the 38 minute mark.
Not sure if this is relevant to your heads but it may help.
Pete
Last edited by VancouverL71; 04-19-2017 at 10:33 AM.
#4
Team Owner
Guide plates are kind of a misnomer. Under normal operation the guide plate should NEVER touch the push rods. so without going through enlarging and how to move them side to side before TQ ing the screw in studs down
If you have larger after market heads with wider altered valve spacing the only cure is offset lifters or rocker arms.
I've ran the Comp cams .100 or .200 and custom over length push rods with solid roller cams and they never touch the guide plates.
You have to run .080 wall good push rods or on higher pressure springs bigger dia.
It is just valve geometry
If you have larger after market heads with wider altered valve spacing the only cure is offset lifters or rocker arms.
I've ran the Comp cams .100 or .200 and custom over length push rods with solid roller cams and they never touch the guide plates.
You have to run .080 wall good push rods or on higher pressure springs bigger dia.
It is just valve geometry
#5
Melting Slicks
Prior discussion:
https://www.corvetteforum.com/forums...lates-how.html
They make these adjustable ones too but you should tack weld them after setting or so they say.
https://www.iskycams.com/cart/adjust...lates-c-1.html
https://www.corvetteforum.com/forums...lates-how.html
They make these adjustable ones too but you should tack weld them after setting or so they say.
https://www.iskycams.com/cart/adjust...lates-c-1.html
Last edited by jimvette999; 04-19-2017 at 10:29 AM.
#6
Melting Slicks
If I understand you correctly, I must respectfully disagree. The pushrod rides in the slot in the guideplate, and is in constant contact with it. This is what keeps the pushrod, rocker arm, and valve in proper alignment. It is also why it is important to use hardened pushrods with guideplates to prevent the guideplate from wearing through the pushrod. (Ask me how I know this.)
#7
Racer
Thread Starter
Would this be considered in or off alignment? (Rocker arms are stock 1.5 rockers for break in. I have 1.6 rollers I'll be installing after I break in the cam. Temporarily removed inner springs as well)
Last edited by Shdggsdv; 04-19-2017 at 02:36 PM.