Vanagon EuroVan
Previous (more recent) messageNext (less recent) messagePrevious (more recent) in topicNext (less recent) in topicPrevious (more recent) by same authorNext (less recent) by same authorPrevious page (September 2010, week 1)Back to main VANAGON pageJoin or leave VANAGON (or change settings)ReplyPost a new messageSearchProportional fontNon-proportional font
Date:         Mon, 6 Sep 2010 19:09:10 -0700
Reply-To:     Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Subject:      Re: Fwd: Boston Bob on Connecting Rod Bolts
Comments: To: David Beierl <dbeierl@ATTGLOBAL.NET>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
              reply-type=response

very interesting. then the only 'good' 2.1 rod is a fully and properly rebuilt one.

----- Original Message ----- From: "David Beierl" <dbeierl@ATTGLOBAL.NET> To: <vanagon@GERRY.VANAGON.COM> Sent: Monday, September 06, 2010 6:05 PM Subject: Fwd: Boston Bob on Connecting Rod Bolts

> >Date: Mon, 4 Sep 2006 10:50:11 -0400 >>Reply-To: ROBERT DONALDS <donalds1@VERIZON.NET> >>Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com> >>From: ROBERT DONALDS <donalds1@VERIZON.NET> >>Subject: Re: Connecting Rod Bolts >>Comments: To: Evan Mac Donald <macdonald1987@SBCGLOBAL.NET> >>To: vanagon@GERRY.VANAGON.COM >> >>Evan >>1.9 and 2.1 rods are the same casting and are interchangeable with the >>exception of the bolt. The longer stroke 2.1 cranks in combination with >>the >>1.9 rod bolts can but do not always hit the camshaft >>The 2.1 rod bolt work well for 150K and I have seen these stretch to yield >>bolts reused with failing. >>2.1 rods distort over time by this I mean the big end is no longer round. >>The cap shifts and the big end gets smaller opposite the parting line. >>Another way to say that is if you draw a line down the rod from the small >>end threw the beam of the rod threw the big end the circle is smaller at >>that point. So just replacing the bolts is not the cure for the 2.1 rod >>problem. The big end needs to be resized to do this I have a cap grinder >>it >>trims a few thousandths off of the mating surfaces of both the rod and >>cap. >>After deburing the hole and installing new non stretch to yield bolts and >>reassembling the rod I torque the nuts and resize the big end with a >>sunnen >>rod hone. Machine shops have spec books to provide dimensions for the >>finished size. >>I take the next step and that is to install rod bearings torque and >>measure >>difference between the size of the ID of the big end with the bearing in >>place The size of the rod journal this is clearance to the crankshaft. The >>difference influences the warm oil pressure. >>used rods with the 150K measure as much as .004ths bearing clearance this >>is >>enough make oil light come on at an idle. My engines have a rod bearing >>clearance of .0015ths. and I can say that because I have invested in the >>right equipment to properly measure clearances and restore dementions. >> >>you CANT just replace the bolts unless you only want 6k out of the engine >> >>my rebuilt rods are $140 exchange with news bolts ready to install >>Rebuilding is about restoring clearances >>assembling is about adding parts >>at Boston engine you get more than parts >> >>Bob Donalds >>Boston Engine >> >>all rights reserved >> >> >>----- Original Message ----- >>From: "Evan Mac Donald" <macdonald1987@SBCGLOBAL.NET> >>To: <vanagon@GERRY.VANAGON.COM> >>Sent: Monday, September 04, 2006 8:51 AM >>Subject: Connecting Rod Bolts >> >> >>>I have heard that the bolts for 2.1 l con rods are not the greatest, and >>>should be replaced on a rebuild with 1.9 l bolts. I don't have any 1.9 l >>>engines around I could steal them out of, and would also worry about >>>re-using "tired" bolts in an upgraded rebuild, anyway. >>> Does any body have any suggestions? I haven't had much luck on my own, >>>but I also have no idea what other bolts may be a usable substitute.


Back to: Top of message | Previous page | Main VANAGON page

Please note - During the past 17 years of operation, several gigabytes of Vanagon mail messages have been archived. Searching the entire collection will take up to five minutes to complete. Please be patient!


Return to the archives @ gerry.vanagon.com


The vanagon mailing list archives are copyright (c) 1994-2011, and may not be reproduced without the express written permission of the list administrators. Posting messages to this mailing list grants a license to the mailing list administrators to reproduce the message in a compilation, either printed or electronic. All compilations will be not-for-profit, with any excess proceeds going to the Vanagon mailing list.

Any profits from list compilations go exclusively towards the management and operation of the Vanagon mailing list and vanagon mailing list web site.