Jump to content

Hot Rod crank numbers


dave5.0

Recommended Posts

what you do to be sure is this-

measure from the top of one of the main bearings to the top of one of the rod pins in the webbing. 6mm=stock, and 8mm=4mill

 

 

before you decide to rebuild it, measure the bearing clearances. side play is ok, but you should not fel any direct play also, check the rod bearing play. same thing. and center seal wear on the thrust surfaces. that will give an initial indication if it will cost as much to rebuild as juast buying a new one.

Link to comment
Share on other sites

what you do to be sure is this-

measure from the top of one of the main bearings to the top of one of the rod pins in the webbing. 6mm=stock, and 8mm=4mill

 

 

before you decide to rebuild it, measure the bearing clearances. side play is ok, but you should not fel any direct play also, check the rod bearing play. same thing. and center seal wear on the thrust surfaces. that will give an initial indication if it will cost as much to rebuild as juast buying a new one.

 

Everything feels ok on the thing. The bearings don't even look too bad. The good rod does feel a little tight when you spin it on the crank. It might just be dry though. I was thinking new 4 mills are in the market of $500. You think it would cost that much to rebuild? I guess if you go $80 a rod and get good bearings it could be close and then include the labor since it's welded already. Might be better off finding a good used one somewhere.

Link to comment
Share on other sites

what the problem is, is what the builder will want to replace, and i've seen new bearings out of spec. you can get cranks for under 400 new, and wildcard has a new hr4mill with extra welds and maxload for 450, which is a pretty good deal as the hr pto bearing can wear out pretty easily

Link to comment
Share on other sites

you already have the crank. i would spend the money and send it off and have it completely rebuilt if possible. then you wont have to worry about it for a long while. buying used got me screwed about 6 months later

 

It probalby wasn't the cranks fault. Probably those Hot Cams you are running. I've heard those are hard on parts.

If I could find one that hadn't been welded I might not be too bad. Get it trued and welded and replace the bearings and go for it. I don't know, I'm going to look around and get some prices.

Link to comment
Share on other sites

what the problem is, is what the builder will want to replace, and i've seen new bearings out of spec. you can get cranks for under 400 new, and wildcard has a new hr4mill with extra welds and maxload for 450, which is a pretty good deal as the hr pto bearing can wear out pretty easily

 

450 doesn't sound too bad. But then again for what I'm doing I could have the good crank I have now trued and welded and get the cylinders ported for about that much.

Link to comment
Share on other sites

if you can find someone to rebuild for that cheap, lemmie know. remember, they have to set the jig and clock it just right during reasembly, mic everything and carefully cut the welds and use the special press tools to put the right pressures on removing square. i'm not sure i'd like a guy taking shortcuts and mess the webbing...

Link to comment
Share on other sites

if you can find someone to rebuild for that cheap, lemmie know. remember, they have to set the jig and clock it just right during reasembly, mic everything and carefully cut the welds and use the special press tools to put the right pressures on removing square. i'm not sure i'd like a guy taking shortcuts and mess the webbing...

 

If I got it done I'd probably send it to Passion where I would get the porting done. I would think he would do it right. He seems pretty sharp. I haven't checked in to it yet though. Been busy.

Link to comment
Share on other sites

It probalby wasn't the cranks fault. Probably those Hot Cams you are running. I've heard those are hard on parts.

If I could find one that hadn't been welded I might not be too bad. Get it trued and welded and replace the bearings and go for it. I don't know, I'm going to look around and get some prices.

 

damn i bet your right about that cam prolly opened my canuder valve up too much and broke a couple muffeler bearings. 450 isnt a bad deal at all, may be your best option at this point. or just have a piston machined to run on the bent rod...that may be cheaper yet lol

Link to comment
Share on other sites

damn i bet your right about that cam prolly opened my canuder valve up too much and broke a couple muffeler bearings. 450 isnt a bad deal at all, may be your best option at this point. or just have a piston machined to run on the bent rod...that may be cheaper yet lol

 

 

Good idea. Hadn't thought about cutting down a piston.

 

Damn that's a big pic!!!

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
×
×
  • Create New...