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General Information => Troubleshooting => Topic started by: mtnbob on February 26, 2011, 11:13:00 am
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Finally got my tax return money and am ready to take my block to the machine shop. I have already been told that I need to take the pistons with me so they can check the clearances. Is there anything else I need to take with me? Do you typically take the crank, intermediate shaft, and camshaft, to get checked or balanced. I have heard others mention that the passages inside of the crank should be cleaned out. Hot tanking for the block, before and after boring needed? Any thoughts on this or an other suggestions? This is the first time I have ever undertaken a rebuild and I want to get everything right. ;D
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The main bearing caps need to go in with it.
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I would get the deck checked/planed.
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Ok, keep them coming, I am writing my list 8)
Is cleaning the passages inside the crank something I should be concerned with?
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Connecting rods checked and reconditioned.
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Connecting rods checked and reconditioned.
And if you are opting for the ARP rod bolts have them installed before checking the rods...
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I hadn't even thought about rod bolts. Can you reuse the original rod bolts? I was considering ARP studs. Are these necessary for a daily driver with stock boost? Can I reuse any of my bolts?
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According to the books, the rod bolts are to be replaced, as well as the crank sprocket bolt, and of course head bolts and flywheel bolts..
However I and many others have reused rod bolts, ad flywheel bolts for that matter.. For my self it was on fairly stock daily drivers...
On my latest engine I had no clue how many times it may have been apart (it was quite the abortion).. I decided to replace rod bolts.. Found a buy on ebay that made the ARP bolts (which are reuseable) almost the same cost as the VW rod bolts...
ARP recomends having the rods checked after installing.. There was a thread on this no too long ago, some people were fine, other needed to have them resized.. Luck of the draw I suppose...
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I never really paid attention till you mentioned it Andrew, Bentley is the only book that does not say to replace them.. ??? The VW service manuals as well as most others say replace them after a certain date in '81, and have different specs for both.. Earlier was a straight 33 ft/lbs, later was 22 ft/lbs + 1/2 turn..
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Dropped off my block today. The place impressed me with their knowledge of VW diesels. Turns out that there are a few diesel dubbers around my area that I wasn't aware of. They didn't blink when I mentioned the .001 tolerances. They asked me to leave my bentley service manual and said they had no problem making sure it was in spec. They said they would install my intermediate shaft bearings and install the pistons, crank and bearings also if I want them to do that. Unfortunately they are pretty backlogged and I am looking at 3-4 weeks before they will get to it :o They had no prob with magnafluxing and checking the block for straightness. They recommended my using top of the line German pistons, seals,bearings , etc.
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Don't feel too bad about that.... The machine shop had my block, head and crankshaft for 4 months. :o
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Just make sure you NEVER tell a machinist, "There's no hurry".. That from the mouth of my machinist.... ;)
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Just make sure you NEVER tell a machinist, "There's no hurry".. That from the mouth of my machinist.... ;)
X2. I was going to put that last night, but for some reason didn't. I have been doing it the other way by telling him "As soon as you can get to it. I am ready to go right now." Still takes a month or so usually.
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ok thanks for the info
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The bushings in the small end of the rods will probably need replaced and reamed to fit the piston pins.
Then the ARP rod bolts and the big end gets checked for roundness.
Then they get balanced.
I don't remember if I had to supply the rod bearings before getting the rods balanced.
Oh yeah, and the oil pump has some bushings in the block that can be replaced.
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I think they told me that they check the rods and pins, I will check on that. Rods balanced? That is the first time I have heard of that. Is that a normal thing the machine shop does during a boring out procedure?
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I think it's normal and always have it checked.
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Ok ty for the input!!!!!!!!I'm on it ;D
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I think they told me that they check the rods and pins, I will check on that. Rods balanced? That is the first time I have heard of that. Is that a normal thing the machine shop does during a boring out procedure?
My guy will not balance them as part of the regular machining, but he will check the big and small end for roundness and size. Balancing extra but not a bad idea.
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Usually when balancing comes into play is when you have one or 2 rods that need resized.. Then the others need balanced to match the ones that were machined...
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I figured new bushing in the small end,..
and new rod bolts in the other might change things.
He took alot off last time.
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I balance my own pistons, and had to take alot off one of them this last time.
sooo I don't think balancing the pistons is optional either.
and it seems like someone said not to tell them to take their time,.. because they will take a very long time.
It tookover 8 months to get all the cleaning, machining and balancing done on the engine I'm putting together now.
I had sev eral other projects going when I brought it in, so I told them not to hurry.
They did a great job,.. and gave me a great price, because I didn't rush them and let them take the high-dollar jobs first.
I wish I had another block ready to sit in their shop for 8 months,.. because I'll probably be ready to put it together by then. ;D
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i'll see how it goes ;D I mixed up the pistons and other parts so they will have to measure and balance them anyway to figure out what goes with what(rookie mistake)
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Nothin a grinder can't fix!! If you end up boring it, you'll have new pistons to contend with anyhow...
For me it's been really hit and miss on the balancing.. Never hurts to check.. My current engine had every darned thing out of whack.. It had spun a bearing and the one rod was in pretty sad shape and beyond repair.. I had some random spare rods about. but one was too heavy and would require more metal removed than they cared to see.. The other was too light and required removing too much from the others.. Ended up stealing a set of rods from another engine I had as I couldn't find one that matched the others close enough..