IJ. said:
I can run my finger over them, and they are very smooth but it is certainly not a flat surface.
:cry:
Getting my head shaved down, how much is too much?
- Thread starter Turbo Targa
- Start date
I can run my finger over them, and they are very smooth but it is certainly not a flat surface.
:cry:
I know it sucks, but you really don't want to waste your time and more money on this head. If you do it's gonna worry you every time you drive it untill it fails and then you're really going to be pissed.
If you were my brother (and you sort of are) I'd advise you to cut your losses and find a good head and an even better machine shop that is used to working on motors that require the tight tolerances and detailed machine work that these motors require to survive.
I feel your pain.
If you were my brother (and you sort of are) I'd advise you to cut your losses and find a good head and an even better machine shop that is used to working on motors that require the tight tolerances and detailed machine work that these motors require to survive.
I feel your pain.
Our eyes can see much finer than we can feel. The machining marks are normal. Most likely your head was bolted to a flat bed and then passed over a rotating bit. if the bit is sharp usually does good job. To get a better finish you can lap it basically using a flat metal plate and lapping compond the surface is polished a bit like making a telescope reflector. If you had the desire you could make it so you could shave in the reflection :icon_bigg .
What method of shaving should have been done? I am wondering if it could be shaved a bit more the proper way, to help correct this situation.
Most likely it was correctly done. Subsequent steps are needed to get a better and more even finish.
It's hard to get a Flat surface hand lapping it it may end up smooth but it will be far from flat!
You can always take it and have another few thou skimmed telling them it must be as smooth as possible!
The motor in my car had this exact issue, I had my head surfaced and assembled they put it in a bag and as I was going to be assembling the motor for a year I put it on the shelf in the workshop without opening the bag.
(Same machine shop same staff for the past 25 years so no reason to check)
When assembly time came I opened it and they'd given it a normal surface job so I took it back explained I wanted it smooth!
The Ironic part of all this is I have a CNC Mill here at home and can get a mirror finish on aluminium all it takes is sharp fresh tooling good clean coolant and the right feed rates!
You can always take it and have another few thou skimmed telling them it must be as smooth as possible!
The motor in my car had this exact issue, I had my head surfaced and assembled they put it in a bag and as I was going to be assembling the motor for a year I put it on the shelf in the workshop without opening the bag.
(Same machine shop same staff for the past 25 years so no reason to check)
When assembly time came I opened it and they'd given it a normal surface job so I took it back explained I wanted it smooth!
The Ironic part of all this is I have a CNC Mill here at home and can get a mirror finish on aluminium all it takes is sharp fresh tooling good clean coolant and the right feed rates!
IJ. said:
A mechanic that I work with said it looked like the head had been shaved down using a belt. I don't know what all the different methods are, but here is what I am thinking about doing. Obviously I may not go to this machine shop again, my other choice would be the Napa machine shop. I should have probably gone there in the first place.
I will stop by and see what he can do with it on Monday. Now I just need to figure out the best way to scrape off the old gasket off the block. It was metal.
Thanks for everyone's input!
Alex