Date: Sun, 1 Jan 2006 20:34:01 -0500
Reply-To: ROBERT DONALDS <donalds1@VERIZON.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: ROBERT DONALDS <donalds1@VERIZON.NET>
Subject: Re: lifter cam Q, 1.9 to 2.1
Content-type: text/plain; format=flowed; charset=iso-8859-1; reply-type=original
> this past weekend i pulled apart 3 wbx motors 2-1.9L and 1-2.1L.
> so my questions are:
>
> 1) How can you check Lifters to be good or bad?? out of the motor!
lifters can be reused but the contact face wears over time some regrind
others just polish and I replace them with FEBI brand
I have an article on lifters at my web site http://www.bostomengine.com
> 2) is the cam the same from 1.9L to 2.1L. they have the same cam gear part
> number, so?
The 1.9 cam has the same as the bug cam in lift exhaust just under .300ths
at the push rod and aprox .325 at the valve.
Intake is just over .305 at the push rod and .335 at the valve
the 2.1 cam has an exhaust lift of .348ths at the valve and the intake is
.368th again at the valve
The third cam that is used is the HP Cam or the lilley profile the intake
profile is gound to the exhaust lobe and they have the same lift within a
couple ths I use these on my stage 3 big valve engines
> 3) What is the Stroke and bore on a 1.9L vs. a 2.1L?
The 2.1 crank is a 76 mm stroke as I recall
dont recall the 1.9 stroke
> 4) what if any internal differences in part interchangablity? if i have
> the 2.1 crank will it drop into the 1.9L case and vise versa? also are the
> Rods the same
> between the 2?
The main journals are the same so the main bearing from one fits the other
and the 2.1 crank does fit in a 1.9 block but the rods will hit the case if
not gound around the head of the bolts. or you could clearance the case
I just stripped a GEX engine and it had some clearanced rods. Im not tempted
to try to use them again
the rod casting is the same but the bolt is differant the 1.9 rod uses a bug
stlye bolt and the 2.1 uses a stretch to yeild bolt with a smaller head
> Well the cases are off being cleaned the crank has had the rods hung and
> im about ready to put the cam and dist. drive gears on. but need info on
> checking lifters and such before short block assembly.
The big end of the 2.1 rods distorts over time and you should not reuse the
bolts and have the rods resized on the big ends at the same time. Cant tell
you how many time folks have come to me with rebuilds that the rods did not
get done and the engine lasted 6K
there is a rod article on my web site Called low oil pressure at low idle
that talks about the rods
I stock a full line of new 2.1 engine parts and can help you with all your
rebuilding needs that includes tech support
Bob Donalds
Boston Engine Exchange
