Help needed - adjustable guide plates? Rockers won't line up
#1
Help needed - adjustable guide plates? Rockers won't line up
Hey guys. Need some advice from seasoned engine builders here. Take a look at my photos below. I just bolted on my set of new Brodix IK180 heads onto my 350 rebuild this weekend and it looks like my rocker arms aren't lining up with the valves. The exhaust looks OK but the intake is off pretty bad. I also got an adjustable pushrod and checked for the length that I will need will. Turns out I do need some a good bit longer than stock (I measure 7.965 end to end with a dial caliper).
So now the questions... am I going to HAVE to buy adjustable guide plates to fix this? I loosened up the rocker arms and tried to wiggle around the comp cams plates that are on there but they don't look like they budge much at all. Why would they put guide plates on these that wouldn't line up push rods on a bland vanilla 010 block 350??? I can't think of a more common combo than what I have here.
Also, I think my rocker arm witness mark is in the right spot given the length I found on the push rod. Could someone confirm that this looks good?
So now the questions... am I going to HAVE to buy adjustable guide plates to fix this? I loosened up the rocker arms and tried to wiggle around the comp cams plates that are on there but they don't look like they budge much at all. Why would they put guide plates on these that wouldn't line up push rods on a bland vanilla 010 block 350??? I can't think of a more common combo than what I have here.
Also, I think my rocker arm witness mark is in the right spot given the length I found on the push rod. Could someone confirm that this looks good?
#2
Drifting
You may have to make the guide plate mounting holes bigger so you can move it around to make the rocker arms center on the top of the valve. I had to do this on brand new Edelbrock heads.
#3
Race Director
Common issue. Typical solution is to cut the part of the guide plate where it connects the two halves and weld them back together.
I had the same problem with my Edelbrock BBC heads and the guide plates Edelbrock supplied! Just for kicks I bought some guide plates from GM and everything lined up fine. Go figure.
I had the same problem with my Edelbrock BBC heads and the guide plates Edelbrock supplied! Just for kicks I bought some guide plates from GM and everything lined up fine. Go figure.
#4
Rather than cutting and welding these guides I think I'll just buy a set of adjustable ones from comp or proform. Do you have to weld them once they are setup though? I don't have access to any welding equipment currently.
#5
Team Owner
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St. Jude Donor '05
Wonder if eliminating the guideplates and using self aligning rockers would be easier. Hate when you run into that stuff!
#7
Isky adjustable guide plates; make sure you get the right size for your pushrods.
http://www.summitracing.com/parts/ISK-200-AGP/
http://www.summitracing.com/parts/ISK-200-AGP/
#9
So I just talked to the tech team at Brodix... they told me that this was pretty common and that I would be fine running this motor as is... I don't know how I feel about that though... Guide plates are only $55. I'm sure they are a pain in the a$$ to install but if it makes things right...
Thoughts on running these just the way they are??
Thoughts on running these just the way they are??
#10
Le Mans Master
I wouldn't run them with that kind of mis-alignment. It's putting a side load on the valve which is going to show up in premature guide wear.
The adjustable guide plates are easy to install - a couple of hours. No welding required
The adjustable guide plates are easy to install - a couple of hours. No welding required
#11
Race Director
I wouldn't feel good about running it as is. Did Brodix offer to pay for a new motor in case a rocker goes and spreads shrapnel around? Didn't think so.
#12
I talked to the guys at Comp Cams about the adjustable guide plates. They actually recommended using JB weld as opposed to mig welding. I will have to admit... I actually thought about posting this possibility on here but then refrained at the thought that it would be too "bubba". Looks like it could actually be a legitimate option though.
Thanks for the insight billla!
#13
Le Mans Master
The guide plates aren't loaded, and they're held in by the rocker studs at 60# torque...they're not going to move. Where is this welding thing coming from?
#14
The comp cams part also mentions welding but it does say "for extra stability" which lead me to believe it wasn't required. I'm going with your suggestion and installing them without the weld. 60 ft/lbs of torque on the stud should be plenty to hold them in place.
#15
Le Mans Master
The biggest thing to watch for is a shift during torquing them down - which I expect is why they note you "may" want to put a weld zot on.
#16
Drifting
[QUOTE=billla;1580699384]I wouldn't run them with that kind of mis-alignment. It's putting a side load on the valve which is going to show up in premature guide wear.
I wouldn't put JB weld in there either. The last thing you need is a chunk of it wandering through your engine.
I wouldn't put JB weld in there either. The last thing you need is a chunk of it wandering through your engine.
#17
Race Director
I loosened up the rocker arms and tried to wiggle around the comp cams plates that are on there but they don't look like they budge much at all. Why would they put guide plates on these that wouldn't line up push rods on a bland vanilla 010 block 350??? I can't think of a more common combo than what I have here.
Also, I think my rocker arm witness mark is in the right spot given the length I found on the push rod. Could someone confirm that this looks good?
Also, I think my rocker arm witness mark is in the right spot given the length I found on the push rod. Could someone confirm that this looks good?
#18
Le Mans Master
Some of the manufactures say that in their description, check here http://www.summitracing.com/parts/ISK-200-AGP/
The comp cams part also mentions welding but it does say "for extra stability" which lead me to believe it wasn't required. I'm going with your suggestion and installing them without the weld. 60 ft/lbs of torque on the stud should be plenty to hold them in place.
The comp cams part also mentions welding but it does say "for extra stability" which lead me to believe it wasn't required. I'm going with your suggestion and installing them without the weld. 60 ft/lbs of torque on the stud should be plenty to hold them in place.
#20
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St. Jude Donor '05
They actually recommended using JB weld as opposed to mig welding.
About the best advice you can get from a 10/hr phone jockey
That stuff melts when it gets too hot.