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Sat Apr 09, 2016 3:58 pm

looks like jonnys is drinking from the pan a bit too much

Sat Apr 09, 2016 4:44 pm

Hate it when someone doesn't agree with your ideas dontcha...pressed in wrist pins are common,they reinforce my point instead of refuting it,the pin is captured in the piston and floats in the rod..happens with the vw engine too,the wristpin floats in the rod and is captured in the piston,,once again ,for the hearing impaired..after 30 plus years in the trade I found that speculating leads to trouble..

Sat Apr 09, 2016 5:35 pm

Ummm.
I believe that there are some pressed into the rod with the piston floating...

google it:
How to assemble an engine: Fitting rods and pistons | Mobil ...
https://mobiloil.com/.../how-to-assemble-an-engine-fitting-rods-and-pisto...
Here, the pin is press fit into the small end of the connecting rod.
The pin movement takes place between the wrist pin and the pin bore of the piston.

no matter how long you've been in the industry, you can always discover something you didn't know about MR. Pan...

Sat Apr 09, 2016 5:47 pm

so we have, a piston floating on wrist pin pressed into rod, and a piston with wrist pin pressed into it floating in the connecting rod, and a wrist pin floating inside the connecting rod AND the piston....

All bases covered ?

Sat Apr 09, 2016 5:59 pm

1500/1600 should be 72mm length
90.5-94mm kits should be 75mm length pin

I do find oversize pins but most are too short.

Sun Apr 10, 2016 7:25 pm

vwinnovator wrote: Ummm.
I believe that there are some pressed into the rod with the piston floating...

google it:
How to assemble an engine: Fitting rods and pistons | Mobil ...
https://mobiloil.com/.../how-to-assemble-an-engine-fitting-rods-and-pisto...
Here, the pin is press fit into the small end of the connecting rod.
The pin movement takes place between the wrist pin and the pin bore of the piston.

no matter how long you've been in the industry, you can always discover something you didn't know about MR. Pan...

no argument,all kinds of ways to skin the cat..but when speaking VW the pivot point for oscillation needed to convert linear travel to rotational travel occurs in the small end of the rod,not the piston.

(for Floridians,oscillate means move back and forth in a semi arc,linear means in a line and rotational means what your sister does on a stripper pole)

Mon Apr 11, 2016 2:30 am

I think your understanding of what a piston looks like is slightly fuzzy.

Mon Apr 11, 2016 5:02 am

johnnypan wrote: vwinnovator wrote: Ummm.
I believe that there are some pressed into the rod with the piston floating...

google it:
How to assemble an engine: Fitting rods and pistons | Mobil ...
https://mobiloil.com/.../how-to-assemble-an-engine-fitting-rods-and-pisto...
Here, the pin is press fit into the small end of the connecting rod.
The pin movement takes place between the wrist pin and the pin bore of the piston.

no matter how long you've been in the industry, you can always discover something you didn't know about MR. Pan...

no argument,all kinds of ways to skin the cat..but when speaking VW the pivot point for oscillation needed to convert linear travel to rotational travel occurs in the small end of the rod,not the piston.

(for Floridians,oscillate means move back and forth in a semi arc,linear means in a line and rotational means what your sister does on a stripper pole)

Odd, for 35 yrs now, everytime i tear down my vw race engines, the pins just slide on out. Never had one "pressed" or seize into the piston. they just seem to float in both the piston AND the rod. Very odd..... :roll:

Mon Apr 11, 2016 6:36 am

vwinnovator, it's funny you should say that... I sometimes come across pins which are too tight to push out with my finger, so I HEAT the piston up, and the pin gets LOOSER, but I must be crazy :wink: .

Mon Apr 11, 2016 7:08 am

FreeBug wrote: vwinnovator, it's funny you should say that... I sometimes come across pins which are too tight to push out with my finger, so I HEAT the piston up, and the pin gets LOOSER, but I must be crazy :wink: .

yes, sometimes on high milage motors the pins are a little tight and need some persuading to get them out.

But, never had to press a wrist pin into a NEW(newer) vw style piston..

Mon Apr 11, 2016 9:03 am

crap buildup or burr/wear pushing up a burr/bump or clip deforming the pin bpre with a burr causes that.. I personaly have not see any pins that are floting in rod and pressed in piston....unless a moron did them. just because somebedy thinks there knolageable for 30+ years dosent mean they know squat or what there looking at or talking about. Im a prime exzample I still cant figure out hpw this dam computer tv and everything else works with basicly 2 wires coming into my house and one of them is the sheilding. must be the pressfit of the inner wire or something. go figure running a performance machine shop for well over 30 years ,making $$$ racing longer than that ,and.... I dont know squat. I gess I might as well give up and go flip a pan of pancakes at jonnys place.

Mon Apr 11, 2016 11:17 am

mark tucker wrote: crap buildup or burr/wear pushing up a burr/bump or clip deforming the pin bpre with a burr causes that.. I personaly have not see any pins that are floting in rod and pressed in piston....unless a moron did them. just because somebedy thinks there knolageable for 30+ years dosent mean they know squat or what there looking at or talking about. Im a prime exzample I still cant figure out hpw this dam computer tv and everything else works with basicly 2 wires coming into my house and one of them is the sheilding. must be the pressfit of the inner wire or something. go figure running a performance machine shop for well over 30 years ,making $$$ racing longer than that ,and.... I dont know squat. I gess I might as well give up and go flip a pan of pancakes at jonnys place.

C'mon over, Ill show you what Im talking about...we'll work on that literacy thing too..Fact is the Vw piston bore isn't designed to handle a moving wrist pin,they made no provision for lubrication like they did on the rod end,it also explains why rod bushings wear but in most cases piston pin bores dont..The issue is a matter of resistance,the pin in the piston only has to be more difficult to spin than the pin in the rod for the rod end to do the work..

Mon Apr 11, 2016 11:32 am

johnnypan wrote:

C'mon... It's fun playing around, but think about the possibility that some newbie might actually believe what you say.
I have been in the business many years, and have designed pistons for many engines spanning from dirtbikes to Lamborghinis and prototype engines. You will find that there are a lot of people with much more experience than me here too.
Either you have absolutely no idea what you are talking about, in which case you should just go away and get a new screen name. Or, you are trolling for attention. You got it now, so I'm leaving this thread.

Mon Apr 11, 2016 12:11 pm

sacamenna...sack0mena...sack of crapola.....and my spellen is bad. I used to live in stock ton....so I reckon I cant figer out where the trolls live now ...well atleas the location is correct.....I think. some people just dont know, some dont get it, some cant get it. I reckon trolls are all combined into one. :wink: I wonder how offter he relubes his muffler bearings and trys to tighten the nut behind the wheel....probably has a 3 bolt main case too.(extra bolt added inbetween so it holds crank real steady.)

Mon Apr 11, 2016 3:51 pm

Odd,,, the Wiesco's and AA's I have sitting on the counter have oil holes in the pin bores :roll:

Mon Apr 11, 2016 4:32 pm

mcmscott wrote: Odd,,, the Wiesco's and AA's I have sitting on the counter have oil holes in the pin bores :roll:
no Mr Scott they do not. you just have some of those aluminum eating termites.funny thing I have them little munchers too all the way over hear in Florida. :wink: you might want to use some spray on them......but then you might end up with holes in the aluminum case.....unless you know how to tune for spray....witch Im sure you do.

Mon Apr 11, 2016 6:37 pm

mcmscott wrote: Odd,,, the Wiesco's and AA's I have sitting on the counter have oil holes in the pin bores :roll:

Well lets see..

this is a mahle..

this is an A&A

and neither have oil holes in the pin bore :roll: so I guess your mistaken...

Hey Tucker why they kick you out of Stockton and shit can you to Florida? didnt know they deported people for being illiterate..c'mon Im just getting warmed up...why I bet you couldnt spell 'cat' if I spotted you the c and the a..

Mon Apr 11, 2016 6:41 pm

Boolean wrote: johnnypan wrote:

C'mon... It's fun playing around, but think about the possibility that some newbie might actually believe what you say.
I have been in the business many years, and have designed pistons for many engines spanning from dirtbikes to Lamborghinis and prototype engines. You will find that there are a lot of people with much more experience than me here too.
Either you have absolutely no idea what you are talking about, in which case you should just go away and get a new screen name. Or, you are trolling for attention. You got it now, so I'm leaving this thread.

yeah whatever, for all your bullshit you didnt bring one point to teach a newbie if one was here..

Mon Apr 11, 2016 6:54 pm

This AA has oil holes

This Wiesco also has oil holes, you have to look into the hole to see the oil holes!

Mon Apr 11, 2016 7:02 pm

Guess I am mistaken and Mark is correct, I have alluminum eating termites! Those bastards sure can eat a straight hole tho!