[urq] urq Digest, Vol 43, Issue 31 (MC Head on WX engine question)
Roman
klodzko at hotmail.com
Sat May 26 12:07:33 EDT 2007
I have a question regarding replacing original WX head with MC head. My
friend just did that, few weeks ago (by some mechanic who seems to know this
type of car) and now he is having problems with "low oil pressure" light.
When the engine is cold (first few minutes of running) everything is working
fine, than "oil pressure light" goes ON.
Car is setting in the garage, my friend is afraid to drive and mechanic is
"gone" (moved to different city or something).
What could be wrong? Wrong "head" gasket? Or it could be something else.
What needs to be done in order to fix this problem? Both of us are new to
the "URQ" forum and we don't have any experience with these cars...
We need help, and we don't know anyone who knows these cars or engines.
Thanks for all your help..
Roman Waksmundzki
-----Original Message-----
From: urq-bounces at audifans.com [mailto:urq-bounces at audifans.com] On Behalf
Of urq-request at audifans.com
Sent: Friday, May 25, 2007 11:00 AM
To: urq at audifans.com
Subject: urq Digest, Vol 43, Issue 31
Send urq mailing list submissions to
urq at audifans.com
To subscribe or unsubscribe via the World Wide Web, visit
http://www.audifans.com/mailman/listinfo/urq
or, via email, send a message with subject or body 'help' to
urq-request at audifans.com
You can reach the person managing the list at
urq-owner at audifans.com
When replying, please edit your Subject line so it is more specific
than "Re: Contents of urq digest..."
Audifans urq list digest
Unsubscription info is available at
http://www.audifans.com/mailman/listinfo/urq
Please do not repost complete digests!
Send posts to: mailto:urq at audifans.com
Today's Topics:
1. Re: [s-cars] Head for your UrQ engine build (QSHIPQ at aol.com)
2. RE : Fuel pump inter-compatibility? (Louis-Alain Richard)
3. Re: [s-cars] Head for your UrQ engine build (Bruce Bell)
4. Fuel pump inter-compatibility? (Ben Swann)
5. custom IC in progress (Brandon Rogers)
----------------------------------------------------------------------
Message: 1
Date: Thu, 24 May 2007 22:25:04 EDT
From: QSHIPQ at aol.com
Subject: Re: [urq] [s-cars] Head for your UrQ engine build
To: shr42 at msn.com, brogers at terrix.com, urq at audifans.com,
s-car-list at audifans.com
Message-ID: <ca6.fb073bc.3387a300 at aol.com>
Content-Type: text/plain; charset="US-ASCII"
The gasket will not solve the problem of WXblock/MChead. An MC head will
bolt onto the WX block, but neither head gasket will be correct. See my
post
from 5 days ago.
I've seen folks trying to use the gasket to solve the problem. It lasts a
few months, then the unsupported part of the gasket material fails and can
cause catastrophic engine failure. The easiest thing to do is modify the
head,
since that is already out of the car.
The direct bolt on hydraulic head for the WX block is the 1985 5000 turbo
head with the WX head gasket. 86> 10vt heads require modification.
Scott J
In a message dated 5/24/2007 5:01:55 P.M. Central Standard Time,
shr42 at msn.com writes:
Brandon , I was told that the MC-1 would fit the wx block if I used the MC
Head gasket. I don't know what the machinist knows , as the shop owner
is
the only one who has contact with him--I do not... I seem to remember some
posts about water or oil passages, but no details. I am assuming that
the
gasket somehow "solves" the problem by blocking off some passages or
something like that. I hope I have it right. I don't want another
meltdown or the
like! Thanks for the imput ... ...Stephen R. '85Urq.. Oh, by
the way, if it was you who told me about Ron Davis Radiators, thanks... It
is working quite well !-- no increase in water temps on all the dyno
pulls.
In a message dated 5/19/2007 7:04:45 P.M. Central Standard Time, QSHIPQ
writes:
In the meantime, try to find a WX head to replace the one you have. A
5000turbo head past 1985 here in the states will NOT bolt onto the WX block
without modifications to either the block or the head. For more on this,
get both
10vt gaskets (WX and MC), you will see what you need to do. The 85 turbo
head will give you hydraulic lfiters and allow you to use the WX head
gasket.
************************************** See what's free at
http://www.aol.com.
------------------------------
Message: 2
Date: Thu, 24 May 2007 23:52:18 -0400
From: "Louis-Alain Richard" <laraa at sympatico.ca>
Subject: [urq] RE : Fuel pump inter-compatibility?
To: <urquattro at comcast.net>, <urq at audifans.com>
Message-ID: <001101c79e80$18274de0$6401a8c0 at dell8200>
Content-Type: text/plain; charset="Windows-1252"
EKTA doesn't help much as the urQ fuel pump (431 906 091A) is unique to
urQ...
But...
Last week, a guy form the mother list sent us this link from Bosch:
http://www.boschautoparts.com/Resources/VehiclePartFinder/
There, you can search for the urQ fuel pump: 69429 and 69438 (we'll see
later why there is two part numbers).
Next, a search for a 1980 5000T, a 1986 4000CSQ or a 1987 Coupe : 69429 and
69433.
At least, you now know that Bosch has a universal fuel pump that works on
any Audi 5 cylinder (try a google search with "Bosch 69429"). But we don't
know why the 69438 is unique to urQ in that period. Different fuel pressure?
Different electrical connectors? Different fuel line connections? Anything
is possible.
We also know from this site that 69438 (or 0 580 254 968) is the direct
interchange to 431 906 091A:
http://store.autopartsliquidations.biz/0580254968.html
Will that help ? Maybe you can try to locate a Bosch distributor and ask him
the specs of each fuel pump ?
Good luck !
Louis-Alain
> -----Message d'origine-----
> De?: urq-bounces at audifans.com [mailto:urq-bounces at audifans.com] De la part
> de urquattro at comcast.net
> Envoy??: 24 mai, 2007 18:12
> ??: urq at audifans.com
> Objet?: [urq] Fuel pump inter-compatibility?
>
> I'd like to try a stock-spec urq fuel pump to see if the uprated one I'm
> using is causing my perennial rich-idle issue. A cheapy junkyard one would
> work best for testing purposes, since I'm not sure that's where the
> problem is and a brand new one is 200 bones.
>
> Obviously, the junkyards aren't brimming with urqs; anybody know a
> compatible external-type unit from another car I could try? Coupe? 4k?
> Early 5k? VW something?
>
> TIA
>
> -Jon
------------------------------
Message: 3
Date: Fri, 25 May 2007 00:45:35 -0600
From: "Bruce Bell" <bbell at surview.com>
Subject: Re: [urq] [s-cars] Head for your UrQ engine build
To: <QSHIPQ at aol.com>, <shr42 at msn.com>, <brogers at terrix.com>,
<urq at audifans.com>, <s-car-list at audifans.com>
Message-ID: <000001c79e98$4eb04160$7c14a8c0 at piedmont>
Content-Type: text/plain; charset="us-ascii"
Yep, listen to Scott, modify the head. VW boys have been doing that since
'83 when they retrofitted GTI heads on earlier blocks. BTDT. In fact IIRC
you will lose CR with the MC head. Scott weren't the early heads a 27 cc (or
was it 25?) combustion chamber VS 30 for the hydraulic lifter heads on the 5
cyl? I remember ending up with a mis-match of head and piston on my old '81
jetta and ended up shaving 1 mm (.040) from the head and carefully checking
piston to valve clearances with the new cam.
Bruce
-----Original Message-----
From: QSHIPQ at aol.com [mailto:QSHIPQ at aol.com]
Sent: Thursday, May 24, 2007 8:25 PM
To: shr42 at msn.com; brogers at terrix.com; urq at audifans.com;
s-car-list at audifans.com
Subject: Re: [urq] [s-cars] Head for your UrQ engine build
The gasket will not solve the problem of WXblock/MChead. An MC head will
bolt onto the WX block, but neither head gasket will be correct. See my
post
from 5 days ago.
I've seen folks trying to use the gasket to solve the problem. It lasts a
few months, then the unsupported part of the gasket material fails and can
cause catastrophic engine failure. The easiest thing to do is modify the
head,
since that is already out of the car.
The direct bolt on hydraulic head for the WX block is the 1985 5000 turbo
head with the WX head gasket. 86> 10vt heads require modification.
Scott J
In a message dated 5/24/2007 5:01:55 P.M. Central Standard Time,
shr42 at msn.com writes:
Brandon , I was told that the MC-1 would fit the wx block if I used the MC
Head gasket. I don't know what the machinist knows , as the shop owner
is
the only one who has contact with him--I do not... I seem to remember some
posts about water or oil passages, but no details. I am assuming that
the
gasket somehow "solves" the problem by blocking off some passages or
something like that. I hope I have it right. I don't want another
meltdown or the
like! Thanks for the imput ... ...Stephen R. '85Urq.. Oh, by
the way, if it was you who told me about Ron Davis Radiators, thanks... It
is working quite well !-- no increase in water temps on all the dyno
pulls.
In a message dated 5/19/2007 7:04:45 P.M. Central Standard Time, QSHIPQ
writes:
In the meantime, try to find a WX head to replace the one you have. A
5000turbo head past 1985 here in the states will NOT bolt onto the WX block
without modifications to either the block or the head. For more on this,
get both
10vt gaskets (WX and MC), you will see what you need to do. The 85 turbo
head will give you hydraulic lfiters and allow you to use the WX head
gasket.
************************************** See what's free at
http://www.aol.com.
_______________________________________________
Audifans urq mailing list
Send posts to: mailto:urq at audifans.com
Manage your list connection: http://www.audifans.com/mailman/listinfo/urq
Have an urq question? Check the Audifans Knowledgebase!
http://www.audifans.com/twiki/bin/view/Audi/UrQuattro
Have an urq answer? ... Please help others by adding to the KB ... all
contributions welcome!
------------------------------
Message: 4
Date: Fri, 25 May 2007 09:34:37 -0400
From: "Ben Swann" <benswann at comcast.net>
Subject: [urq] Fuel pump inter-compatibility?
To: <urquattro at comcast.net>, <urq at audifans.com>
Cc: quattro at audifans.com
Message-ID: <019401c79ed1$704f7f00$6801a8c0 at swansong>
Content-Type: text/plain; charset="us-ascii"
You can use a 4000 Q or CGT pump, but I'd go with the later higher flow one
from NG equipped 87.5 CGT or Model 80 (even the 4 cyl CIS-E ones have this
pump) which might be even easier to find. Will be a direct replacement, but
will need to adapt to a larger inlet hose. Worth doing and will facilitate
future fuel mods without wrecking your present mixture setup. BTDT on
several
cars, both stock and modified. Make sure you have a pre-filter on prior to
pump (suction-side). I have seen several without this and ofter leads to
premature pump failure including failure of new pumps. Trap the crap before
it gets to the pump! Leave the micron size particles for the big filter.
Ben
[Date: Thu, 24 May 2007 22:11:54 +0000
From: urquattro at comcast.net
Subject: [urq] Fuel pump inter-compatibility?
To: urq at audifans.com
I'd like to try a stock-spec urq fuel pump to see if the uprated one I'm
using
is causing my perennial rich-idle issue. A cheapy junkyard one would work
best
for testing purposes, since I'm not sure that's where the problem is and a
brand new one is 200 bones.
Obviously, the junkyards aren't brimming with urqs; anybody know a
compatible
external-type unit from another car I could try? Coupe? 4k? Early 5k? VW
something?
TIA
-Jon]
------------------------------
Message: 5
Date: Fri, 25 May 2007 09:19:57 -0600
From: "Brandon Rogers" <brogers at terrix.com>
Subject: [urq] custom IC in progress
To: "Urq List" <urq at audifans.com>
Message-ID: <002b01c79ee0$27ab5030$0f01a8c0 at BCROGERS>
Content-Type: text/plain; charset="us-ascii"
Guys-
Well I'm having a local fabricator do up a custom IC for me. After my
issues with the alternator when I had the 944T IC in there ( I still have
A/C - kinda - crappy R134 ) I decided I would pursue a bigger IC that
allowed the alternator to remain in stock location. I did some lookin' and
figurin' - and it looked like a thicker IC could extend forward on the outer
side of the IC, and extend rearward on the inner end - especially with use
of a shorter alt belt. Keep in mind I'm using an RR alternator bracket on
the 3B block - so I went from 840mm to 815mm length. My new core is 12L x
6.8H x 4.5D, vs. 12L x 5.5H x 2.5D for stock WX (both bar/plate) so same
length hence no need to move alternator - however I've been running an RR IC
since the 3B conversion - its dimensions are 12 x 6.5 x 2.5 tube/fin. So it
flows a little more than WX IC. Per Bell's site, this new core should flow
a good 500 CFM whereas the RR IC was closer to 275 CFM. I have a few
in-progress pics if anybody is interested - I think I'll post them up at
Motorgeek soon. Obviously this is not the way to go for the guys that want
monsters - which has never been my goal for this car - just more reliably
starting, consistent power, slight increase in power - and this IC will
hopefully optimize performance some more, while staying in my parameters.
3B motor is stock save RS2 EM and turbo and running about 22 psi.
Brandon
'84 ur 20Vt
------------------------------
_______________________________________________
Audifans urq mailing list digest
Send posts to: mailto:urq at audifans.com
Manage your list connection: http://www.audifans.com/mailman/listinfo/urq
Have an urq question? Check the Audifans Knowledgebase!
http://www.audifans.com/twiki/bin/view/Audi/UrQuattro
Have an urq answer? ... Please help others by adding to the KB ... all
contributions welcome!
End of urq Digest, Vol 43, Issue 31
***********************************
More information about the urq
mailing list