Author Topic: What questions do I ask the machine shop for my rebuild?  (Read 7745 times)

Reply #15March 03, 2011, 04:17:39 pm

mtnbob

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Re: What questions do I ask the machine shop for my rebuild?
« Reply #15 on: March 03, 2011, 04:17:39 pm »
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?
86 VW Golf 1.6 N/A 4-door (soon to be turboed!!!)
http://farm4.static.flickr.com/3248/2598033828_d3d19f9842.jpg?v=0
96 Subaru Outback Wagon

Reply #16March 03, 2011, 09:21:21 pm

fatmobile

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Re: What questions do I ask the machine shop for my rebuild?
« Reply #16 on: March 03, 2011, 09:21:21 pm »
I think it's normal and always have it checked.
Tornado red, '91 Golf 4 door, with M-TDI 12mm pump, south bend clutch, VNT-15 turbo, 02A trany
MK4s: 2000 TDI jetta, 2003 TDI wagon, 2000 golf 2.0 gasser.
'84 Rabbit with 1.7TD KY block pistons bored to 80mm, VNT-15
'84 GTI with stock 1.6TD starion intercooler.

Reply #17March 04, 2011, 01:49:36 am

mtnbob

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Re: What questions do I ask the machine shop for my rebuild?
« Reply #17 on: March 04, 2011, 01:49:36 am »
Ok ty for the input!!!!!!!!I'm on it ;D
86 VW Golf 1.6 N/A 4-door (soon to be turboed!!!)
http://farm4.static.flickr.com/3248/2598033828_d3d19f9842.jpg?v=0
96 Subaru Outback Wagon

Reply #18March 04, 2011, 04:28:44 am

theman53

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Re: What questions do I ask the machine shop for my rebuild?
« Reply #18 on: March 04, 2011, 04:28:44 am »
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.

Reply #19March 04, 2011, 06:21:38 am

maxfax

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Re: What questions do I ask the machine shop for my rebuild?
« Reply #19 on: March 04, 2011, 06:21:38 am »
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...

Reply #20March 04, 2011, 04:17:57 pm

fatmobile

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Re: What questions do I ask the machine shop for my rebuild?
« Reply #20 on: March 04, 2011, 04:17:57 pm »
I figured new bushing in the small end,..
 and new rod bolts in the other might change things.
 He took alot off last time.
Tornado red, '91 Golf 4 door, with M-TDI 12mm pump, south bend clutch, VNT-15 turbo, 02A trany
MK4s: 2000 TDI jetta, 2003 TDI wagon, 2000 golf 2.0 gasser.
'84 Rabbit with 1.7TD KY block pistons bored to 80mm, VNT-15
'84 GTI with stock 1.6TD starion intercooler.

Reply #21March 04, 2011, 04:24:33 pm

fatmobile

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Re: What questions do I ask the machine shop for my rebuild?
« Reply #21 on: March 04, 2011, 04:24:33 pm »
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
Tornado red, '91 Golf 4 door, with M-TDI 12mm pump, south bend clutch, VNT-15 turbo, 02A trany
MK4s: 2000 TDI jetta, 2003 TDI wagon, 2000 golf 2.0 gasser.
'84 Rabbit with 1.7TD KY block pistons bored to 80mm, VNT-15
'84 GTI with stock 1.6TD starion intercooler.

Reply #22March 04, 2011, 06:36:28 pm

mtnbob

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Re: What questions do I ask the machine shop for my rebuild?
« Reply #22 on: March 04, 2011, 06:36:28 pm »
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)
86 VW Golf 1.6 N/A 4-door (soon to be turboed!!!)
http://farm4.static.flickr.com/3248/2598033828_d3d19f9842.jpg?v=0
96 Subaru Outback Wagon

Reply #23March 04, 2011, 06:51:58 pm

maxfax

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Re: What questions do I ask the machine shop for my rebuild?
« Reply #23 on: March 04, 2011, 06:51:58 pm »
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..