Re: Gen 6 lifters and pushrods?
 

hpscarab, no these are just the stock GM ones, the cranes are longer!

Re: Gen 6 lifters and pushrods?
 

The Mercruiser part numbers for the Hydraulic roller lifters are as follows:
502 MPI – 850466T
500 EFI – 849947 T
500 HP – 848158 T1
The 502 MPI lifter is similar to the OEM and used with a .483” lift cam and is not used with the high lift/reduced base circle cams.
The 502 EFI lifter is used with the .598”/ .610” cam
The 502 HP lifter is used with the .576”/ .598” cam
Crane issues these warnings because they manufacture the majority of the valve train components for Mercruiser.
http://www.cranecams.com/?show=brows...21&lvl=2&prt=5
see remarks at bottom

http://www.cranecams.com/index.php?s...&lvl=3&prt=117
see description

http://www.cranecams.com/?show=newsLetters&no=121
see tech tips
http://www.chevyhiperformance.com/techarticles/93620/

http://www.cranecams.com/index.php?s...&lvl=3&prt=117
see descriptions
Tech note from Scoggin Dickey page 11
“B) Thinking about a cam change in your 502? Then you must check for lifter and guide bar interference. The factory hydraulic roller lifter will accept (approximately) a maximum of 0.326” lobe lift (0.555” valve lift) on a stock base circle. If you want more lift than this and wish to retain the factory guide bars and retainers you must purchase the Crane replacement Hydraulic roller lifters. CRA16535-16”
Bob

Re: Gen 6 lifters and pushrods?
 

If you went with a longer valve ? You must of had to shim up the spring The 929 is setup at 1.880 at 145lbs with a stock length valve .

They can cut the seal boss if needed . What seals where you using?




jdnca1 I am fixing to find out on the RPM thing with them . Hine sight 20/20 Now I wish I went with the Morels or Crowers with the vertical bars. I have ran the Crowers up to 7250 before lifter collapse[valve float]


Don't take any chances.

Rob

Here is a pick of my used Crane tappets and the new ones I just put in. They did change some

Re: Gen 6 lifters and pushrods?
 

We ran a set of the Crane 13532's (link bar style) to 6400 on the dyno with no problems on crane 651 cam. Isky springs.

RM, now you've got me curious, do you think Crane or whomever makes (1 off) lifters just for Mercury? If they are the tall ones why do you have to go to shorter pushrods on the aftermarket stuff? Again, trying to learn something today. Maybe they do just to keep us boaters guessing.... :drink: It's hard for me to believe Mercury uses 3 different lifters in their 502 motors, could it be the same lifter with 3 different part numbers?

I have a set of stock lifters out of 500EFI sitting on the shelf at home..I will post a length measurement on them tonight.

Re: Gen 6 lifters and pushrods?
 

Strip;

The lifters that came out of the motor are the same style as "left" ones in your picture.

Lifters are 2 11/16" long from the bottom of the wheel.

Re: Gen 6 lifters and pushrods?
 

I am using pro form seals.
Springs are shimmed to 145 on the seat.

Do the springs take an initial set and lose some poundage like most springs in different applications?
How long does this take?
Does any one have data on how much these 929 springs lose and would it be worthwhile to shim them up a bit on the stiff side to compensate for the initial set?

My stock lifters are 2.60 or 2 11/16 long from bottom of wheel also.
This kind of makes me think they may be the same as the 500EFI lifters.

Thanks. Dave

Re: Gen 6 lifters and pushrods?
 

[QUOTE=jdnca1]We ran a set of the Crane 13532's (link bar style) to 6400 on the dyno with no problems on crane 651 cam. Isky springs.


The ones on the left are the ones that came out of my 500efi . The motors have been into before so they could of been replaced.There 3 years old . they could of change how they look from then?I assume the old ones are the 16535.

The 13532 I don't think we can compare them to the 16535.


My motor had the comp 929's in it for 187 hours and they varied about 5 pounds . so it really doesn't look like it lost enough to worry about in the 187 hours. I bought new ones anyway.

If you have the longer valves?you had to shim it back up the 145 . the shims would be the thickness of the extra length valve ,unless you used a different retainer?

As far as Crane lifter there getting some of the parts from Eaton.Like bob said there are only 2-3 one tier lifter manf and they supply the cam makers with the hole lifter or just parts for them to assemble there own.They build them to how the cam manf ask them to.Price probably comes into the factor on some company's .

Like what I ran into on getting my 16535. they where on back order from Nov 1 to jan 15. they told me they where waiting on Eaton to supply the guts the the tappets to put them together.This sounds to me there is 2 diff manf parts in them .Not saying this is bad .

One thing I try to remember on this board , You have allot of people that give there experience or what the have heard :eek: that gives you advice on what to use .Not to say there is 2 different ways to do something both right . When I give my experience and I am not a 100% sure that there could be a better way or part, I will tell ya.

We have some very knowledgeable people on here and some are getting frustrated butting heads with people and the ones that miss inform .Some have all ready left the board :( There not here to run there post count up.Just help.

I have talked to two different professional engine builders on the board on why they have quit posting. They got tired of the BS and people not thanking them.

I appreciate there help and want to Thank you all. :D :D

Now lets blow up something :evilb: :D

Rob :drink:

Re: Gen 6 lifters and pushrods?
 

I ran into the same problem on the 16535's. ordered them in late december and still no estimate on "when" by mid Feb so I changed to the "link bar" style that were on the shelf. When I spoke to Crane about one style over the other they had no preference..."if anything the retainer style had 1 less part to fail", which I agree with.

I agree with your comments on posting experiences, that's what I try to do. I know I struggled with the lifter / pushrod issue and am trying to help out with what I know worked for me.

My motors had definately NOT been into, so the lifters were stockers (whatever that is from Mercury) and appear the same as yours on the left.

I'm sure there are multiple ways to skin the cat so to speak. :drink:

Your project looks to be coming along well, let us know how it all turns out. :drink: :drink:

Re: Gen 6 lifters and pushrods?
 

It looks like the 13532 "retrofits" need the shorter pushrods and the 16535 retainer style does not....that mystery is solved. :D

Now the question is, are the lifters from Mercury the Crane 16535's?

Re: Gen 6 lifters and pushrods?
 

That's what I've been wondering too.

If you look at the cam card for the 169611,
( HP500) it says use 16535's
http://www.cranecams.com/index.php?s...11&lvl=2&prt=5