Recent content by Red 409 63 impala

I am changing my intake on a 409 400hp. Do you need to put thread sealer on the intake manifold bolts?

Is there a difference between the distributor shaft used for 409 and other Chevy big blocks? I borrowed a prime tool from a friend and the shaft on my 09 distributor has a bigger diameter than than the tool. Just wondering.

Is there a replacement valve spring for a 691 head. The same valve spring that came from GM in a stock 425 hp head...if so where is it available.

Success....Strighrening the fork end did it..Works much better!!

The 1.55 o/d springs fit in the recess with a little wiggle room.Altough only one spring was cracked I am replacing all of them. I noticed that one other shield starting to split.I received a few tips about not using the oil shields. I noticed the old springs had shined surfaces where the...

The valve spring seats look like the were cut for bigger springs, also the seals have a white insert, believe they are Teflon.

Forgot to mention it has a hyd cam with Scorpion rocker arms. Not sure of the specs for the cam, as I purchased the car with this engine rebuilt with no run time. Was told the cam had a mild performance grind.

Still working on my valve spring replacement. 63 409 425 hp..found a broken valve spring, doing some checking and the o/d of the springs in the head is 1.550 in...does any one know what the o/d of the springs the are for the stock big port heads is?

It does not seem to make a difference. I think the fork must have the downward force must be evenly distributed on the retainer to keep it centered on the valve stem to be able to insert both of the keepers.

Well started to replace the valve springs in my 63 409..Purchased the push down valve compressor with the handle as it seemed like the easiest to use. Screwed the tool on the rocker stud, but when I compress the spring it moves the spring retainer off center making it impossible the drop both...

The latest development...a member of our car club is a really skilled machinist..Asked his opinion on removing the old fitting. He did this..found a bolt a little smaller than the id of the fitting, removed the head of the bolt and tack welded it at the opening used a slam hammer came right out...

Lastest problem with my 409 eng. In the changing out of the intake manifold did a compression check and found out # 4 had 0 compression. When I pulled the valve cover..broken valve spring...I see replacing a valve spring can be done without pulling the head. I have a hose to hook air in the...

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I have a GM 409-425 intake manifold that the fitting from the water pump hose to the intake manifold hose hooks up to. It appears to be a screw in fitting. I also have 409-400 hp single carb that uses a press in fitting.for the bypass hose.Has anyone replaced this press in fitting.it looks like...

I have noticed that a few vendors seem to be making a few bucks on shipping. They charge the posted UPS charges and I must believe that they get the ship station prices for shipping. Maybe it a small point, but vendors should try to keep costs down.