Valvertrain noise, loose rocker, port matching... need help from guys in the know!

astronut1885

Founding Member
Jan 31, 2002
1,899
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Assonet, MA
Hey guys. I haven't been posting much, school has been eating all of my time. Anyway, a problem has arisen with my car. Two days ago I got a nasty sound coming from the right head area. It's a knocky, scratchy, ugly metal on metal sound that responds to RPM. Today I pulled a valve cover with a friend, and found that one of the rockers was not straight. It was off by maybe 10-15*, enough so that the roller tip was barely on the spring top. We straightened it, hoping that would cure the noise, but it didn't. The car still sounds really bad. I called my mechanic, and he said when his car had the same symptoms, it was a bent pushrod. He said the loose rocker caused the pushrod to get bent in the head, and it's rubbing and making noise. I thought it might be a lifter, since when I rebuilt the top end last spring the only thing I reused was the lifters, and they're 130k miles old.

Anyway, tomorrow I am going to pull the pushrod from the crooked rocker and roll it on a flat surface to see if it's bent. If it is, then I'll stick another in it's place. Either way, I am going to order some new lifters. If it's not the pushrod, where should I look?

Next question- when I pull the intakes to install some new lifters, I am very tempted to pull my heads with them and have it all gasket matched. My mechanic said he'd gasket match the intakes to each other, then the heads to the intake, and then match the exhaust ports on the heads to a gasket for the headers. He said he'd do all of it for 200.00. Is this a good idea to have done? My heads had valve work done before I bought them, but are not ported or polished. While he's not doing a full port job, I figure a little port enlargement and gasket matching can't hurt. They're Iron GT40P heads from Ford. What do you guys think?
 
Definetly gasket match the gaskets. My college professors told me that would increase airflow and help combustion when I use my propane injection. It also helps to use three intercoolers and draft semi trucks to save on gas.
 
Honda Land? U dont know who your talking too!! Listen to me, Iv been majoring in alterative fuels in college for sometime now, and my college professors TOLD me what to do. Are you calling my professors idiots?
 
Cobra tt said:
Definetly gasket match the gaskets. My college professors told me that would increase airflow and help combustion when I use my propane injection. It also helps to use three intercoolers and draft semi trucks to save on gas.

that kid is on some drugs
 
Port matching them definetly wouldnt hurt, im sure you could free up some hp that way. You could probably get away with doing it yourself if you have time, i believe they use clay, or playto to get the impression of the gasket/port and start from there. If u have a dremel, its worth a shot.
 
"It also helps to use three intercoolers and draft semi trucks to save on gas."
That says it all dip****. And when your three intercoolers are rammed up a semi's bumper that you were drafting and your head is one with the dashboard, we'll see what your propane huffing professors think. Now, go back and drive your Dae-Woo, bitch.
 
"A mid-Valley 6speed Semi-Clutchless is a racing transmision that is used in NASCAR, the semi-Clitchless part is that the use of the clutch is optional for shifting through the first 4 gears.
The overdrive unit is an aftermarket unit that repaces the tail housing and gives an overdrive to every gear, if the user so choses via on off swith inside the vehicle"

BWAHAHAHAHA! Nascar runs a modified 5 spd manual transmission with 5th gear deleted. They are just beefy 5 spds. What a tard.
 
WTF do u know ASSTROLLNOT!! Get a life, how do you know what NASCAR uses, leeme guess, you have a Nascar in your driveway? GUESS WHAT??? I DO!! And Iv gone to school for this, Are you a certified mechanic? Your all HATERS!
 
uh, a NASCAR in my driveway?
NASCAR stands for National Association of Stock Car Automotive Racing. So no, I don't have a racing association in my driveway. I do, however, know a bit about Nascar, and have a friend who races in the Dodge weekly series, and work with him often. And you're right, I'm not an ass troll, so thanks for pointing it out, moron. And I doubt you have a NASCAR approved stock car in your driveway, I doubt you are a "certified mechanic" and I think your "professors" aka teddy bears, can suck my balls!
ANY MODS OUT THERE, PLEASE BAN THIS ASSCLOWN!
 
Wow.... cobra tt I have seen some ****ing retards on this site but you take the cake. It sounds like you are a 13 year old kid who reads a couple of magazines and gets a far fetched idea to come on here and play with the big boys.:) Your professors.... I doubt you are in college and if you are than that says a lot for our college acceptance requirements. Get a life, and quit talking ****, there are places for you...... go there.

As for the chattering sound, I would suspect that the rocker arm was the problem in the first place, but then when it fouled up it caused the pushrod to get screwed up. If that doesn't fix it then it could be the lifter but that is just strange because they usually don't go bad but it could be. If that isn't the problem then give some more info.... and I would definetly get the port matching, maybe even port, polish and shave them. good luck.
 
You posted your mechanic would "gasket match", this is a waste of time and not worth it. HOWEVER if you PORT match the intake to the head it is worth it, the intakes and heads should be scribed/marked while they are on your motor since the deck height of your motor will change the relationship of the head to intake...
 
Yeah, he said he'd gasket match. I figure that opening up all the ports to the same size, using the gasket as a template, would help, especially on the exhaust side. He did his own set of GT40P heads, and said he had good results. He's a close friend and he has pretty much built my car with me, so I trust him when he says I'll see an increase, rather than him trying to make money. I know that he'd get something better out of the heads with whatever he'd do.