Greddy Manifold
#2
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Yes they are repairable. Its made of cast iron. Make sure you repair it right. Drill a hole on the end of each of the cracks. Then bevel the cracked part, preheat, and weld. For post welding ping the weld with a blunted object to relieve stress. Viola!
#9
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Welding cast is tricky. Most people dont do it right and it just cracks again.
You have to heat the manifold in an oven to over 500 degrees, then get all the welding done before the manifold props to below 200 degrees. It drops faster than you think.
You have to heat the manifold in an oven to over 500 degrees, then get all the welding done before the manifold props to below 200 degrees. It drops faster than you think.
#10
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Have you tried all the usual fixes like relief cuts at the stud holes or bracing the downpipe to relive manifold stress? Did all of your manfolds fail in similar fashion? i.e. cracks in the same place?
#11
My first one cracked and this one cracked. I have had relief cuts in the last three and they all warped like hell. My turbo and my downpipe were also hard-braced to my engine so driveline flex wouldn't cause any problems, but that didn't really fix anything. Three out of four warped (even with relief cuts) and two out of four cracked. I talked to the guy that did all my fab work and he said the easiest fix is to design a new manifold, which is great news because the GReddy one is hella restrictive. I used to love GReddy/Trust products, but since owning this car and not receiving a hint of customer support for anything regarding the B6, damn... I really have nothing nice to say about them.
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