Pics of Melling potential disasters!!!!!
01-02-2008, 10:08 PM
#201
Melting Slicks
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Location: Heidelberg PA
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i've just got my Melling pump
and now im scared !!!
maybe i've just got the BAD style pump !
is it no good for my L98 ?
im currently rebuilding it
and i dont want it to fail
if its really the bad one,which pump should i go with ?
thanx
here pics of my new never used pump
and now im scared !!!
maybe i've just got the BAD style pump !
is it no good for my L98 ?
im currently rebuilding it
and i dont want it to fail
if its really the bad one,which pump should i go with ?
thanx
here pics of my new never used pump
01-02-2008, 10:53 PM
#203
Le Mans Master
Originally Posted by Slalom4me
Originally Posted by Slalom4me
However, now I wonder if there are three levels
of castings: weak, intermediate and heavy.
of castings: weak, intermediate and heavy.
He brought out an M55, M55HV and an M-Select 10555 for us to
look at. (These do not have equivalent dimensions, they happened
to be what he had available in the three models.)
The M55 clearly has the least material in the pump leg, the notch
created when the bolt hole was spot-faced was <= 3/16" wide.
The top of the leg where it joins the main cap is surfaced flat with
no pocket. The casting is light/medium gray in colour.
The M55HV is the same colour but the notch is wider. The top of
the leg has a pocket. The picture Midnight 85 posted above is
pretty much the same as the pump I looked at. The same warning
card is in the box.
The M-Select 10555 comes in different, black packaging. The casting
colour is much darker. The notch is wider than the M55HV. The
casting seemed beefier in the main body, too, with more rounded
corners and less casting flash. The top of the leg has a pocket.
shipped with Melling's warning card.
If I was building an engine for performance use and had the luxury of
waiting, I would choose to exhange the M55HV for an appropriate
M-Select pump from Melling (or from one of their resellers.)
If an M55HV was installed in a completed car, I'd have to think about
my intended use of the vehicle and weigh the risks of failure against
the effort & expense of replacing the pump.
.
01-02-2008, 11:09 PM
#204
Melting Slicks
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From #145 (12/2006)
The M55HV had more material in the leg than the M55, but it still
shipped with Melling's warning card.
If I was building an engine for performance use and had the luxury of
waiting, I would choose to exhange the M55HV for an appropriate
M-Select pump from Melling (or from one of their resellers.)
If an M55HV was installed in a completed car, I'd have to think about
my intended use of the vehicle and weigh the risks of failure against
the effort & expense of replacing the pump.
.
The M55HV had more material in the leg than the M55, but it still
shipped with Melling's warning card.
If I was building an engine for performance use and had the luxury of
waiting, I would choose to exhange the M55HV for an appropriate
M-Select pump from Melling (or from one of their resellers.)
If an M55HV was installed in a completed car, I'd have to think about
my intended use of the vehicle and weigh the risks of failure against
the effort & expense of replacing the pump.
.
I on the other hand, being conservative, would never let a potential failing POS melling standard pump in any small block.
jeffyc - DO not use a bolt to hold the pump on - USE A STUD/NUT.
Last edited by 85vet; 01-02-2008 at 11:18 PM.
01-03-2008, 12:48 AM
#206
Le Mans Master
i dont want to take the risk
so i think im buying
http://www.milodon.com/oil-system/oil-pumps.asp
but i dont know which one !!
or maybe the Melling # 10553 old style oil pump
or maybe reuse my old stock pump
what you think ?????????
so i think im buying
http://www.milodon.com/oil-system/oil-pumps.asp
but i dont know which one !!
or maybe the Melling # 10553 old style oil pump
or maybe reuse my old stock pump
what you think ?????????
01-03-2008, 07:40 AM
#207
Melting Slicks
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i dont want to take the risk
so i think im buying
http://www.milodon.com/oil-system/oil-pumps.asp
but i dont know which one !!
or maybe the Melling # 10553 old style oil pump
or maybe reuse my old stock pump
what you think ?????????
so i think im buying
http://www.milodon.com/oil-system/oil-pumps.asp
but i dont know which one !!
or maybe the Melling # 10553 old style oil pump
or maybe reuse my old stock pump
what you think ?????????
01-03-2008, 08:36 AM
#208
Le Mans Master
01-03-2008, 09:01 AM
#209
Le Mans Master
ARP sells at least four styles suitable for the SBC: 230-7001 through
to 230-7004. Two have conventional hex nuts (SV & HV castings) and
two have 12 point nuts (SV & HV castings).
As for a source for M-Select pumps, forum supporter Jegs carries the line.
.
01-03-2008, 03:25 PM
#212
Le Mans Master
Why?
The following is paraphrased from Chapter 5 - Bolt Specifics
"Carroll Smith's Nuts, Bolts Fasteners and Plumbing Handbook"
Motorbooks International
ISBN-10: 0879384069
$25 @ Amazon
The following is paraphrased from Chapter 5 - Bolt Specifics
"Carroll Smith's Nuts, Bolts Fasteners and Plumbing Handbook"
Motorbooks International
ISBN-10: 0879384069
$25 @ Amazon
In highly stressed applications, studs are preferable to bolts
for two reasons.
frequent removal and installation of parts occurs. This is because
when studs are used, thread wear/damage occurs on the studs,
instead of on the threaded holes in the casting. Replacing a damaged
stud is easier and cheaper than repairing a threaded hole.
Note that studs are intended to be inserted finger-tight only, not
torqued into the hole. Theoretically, a Class 5B tap should be used
to form the female threads - this results in a slight interference
fit which helps prevent the stud from backing out when the nut
is removed. However, in practice where studs are used in holes
originally tapped for bolts, the application of Loctite will serve to
achieve the desired interference fit.
.
for two reasons.
- First, less of the force of tightening is used up in overcoming
thread friction, so the desired level of residual stress can be
more accurately approximated. - Second, residual stress in a stud is more evenly distributed
than in a bolt.
frequent removal and installation of parts occurs. This is because
when studs are used, thread wear/damage occurs on the studs,
instead of on the threaded holes in the casting. Replacing a damaged
stud is easier and cheaper than repairing a threaded hole.
Note that studs are intended to be inserted finger-tight only, not
torqued into the hole. Theoretically, a Class 5B tap should be used
to form the female threads - this results in a slight interference
fit which helps prevent the stud from backing out when the nut
is removed. However, in practice where studs are used in holes
originally tapped for bolts, the application of Loctite will serve to
achieve the desired interference fit.
01-03-2008, 03:55 PM
#213
Le Mans Master
Thanx ! Good explanation ! now its crystal clear for me
i found this on another board,Camaro related
and the same ...a guy broke his Melling pump in almost two !!!!
the new casting its really weak and i dont want to take the risk !
Look at this !!! :
i found this on another board,Camaro related
and the same ...a guy broke his Melling pump in almost two !!!!
the new casting its really weak and i dont want to take the risk !
Look at this !!! :
01-03-2008, 05:26 PM
#214
Le Mans Master
the M-Select casting and the revised casting for the traditional pumps.
My vote is that the M-Select is the newest casting, while the revised
versions of the original castings are said to have been in production
since 04/05.
The pump shown above is not an M-Select. This pump has a narrow
gusset extending to the leg from the body and there is no pocket in the
flange mount where the oil exits into the rear main cap. The M-Select
casting is much heavier in the leg area and all versions I have seen
include a pocket in the flange.
.
01-03-2008, 05:53 PM
#215
Le Mans Master
Yes i know is a regular pump
that's why we should go with a M-Select one
But ....now that you say...
maybe there is a "new version " of the M-Select too ???????
btw ....how many of you had problems with your oil pump ?
maybe its all hype
that's why we should go with a M-Select one
But ....now that you say...
maybe there is a "new version " of the M-Select too ???????
btw ....how many of you had problems with your oil pump ?
maybe its all hype
01-03-2008, 06:51 PM
#216
Le Mans Master
You wrote "the new casting its really weak" and posted a picture of
what appears to be an M55. My understanding is that the M-Select
line is the newest series of pumps.
Chronologically
- Traditional Melling M55 & ect.
. - 'Improved' lightweight Melling M55 & ect.
. - M-Select 10553 & ect.
choice for performance use than the lightweight Melling M55 & ect.
.
01-03-2008, 08:04 PM
#218
Le Mans Master
From the Melling website
in 04/05.
.
Welcome to the NEW Melling Select Performance Line of Engine Parts!
In 2006, our 60th year in business, we are re-inventing ourselves
and creating this new chapter in our history book.
The Melling Select Performance brand was conceived in November 2004
to better market our current performance oil pumps, camshafts, timing
components, valve train, and cylinder sleeves. We also have a goal to
further analyze the performance engine parts market, specifically
the “hobbyist street rodder” and the “weekend warrior racer” to
develop new and innovative engine parts for them.
The re-engineered M55 series pumps are said to have been releasedIn 2006, our 60th year in business, we are re-inventing ourselves
and creating this new chapter in our history book.
The Melling Select Performance brand was conceived in November 2004
to better market our current performance oil pumps, camshafts, timing
components, valve train, and cylinder sleeves. We also have a goal to
further analyze the performance engine parts market, specifically
the “hobbyist street rodder” and the “weekend warrior racer” to
develop new and innovative engine parts for them.
in 04/05.
.
01-04-2008, 02:10 PM
#220
Burning Brakes
hi
maybe also take a look at the bottom of page 10....
PM gears now in them.....
http://forums.corvetteforum.com/show...558337&page=10
regards
maybe also take a look at the bottom of page 10....
PM gears now in them.....
http://forums.corvetteforum.com/show...558337&page=10
regards