MonteCarloSS.com
MonteCarloSS.com
Previous Thread
Next Thread
Print Thread
Page 3 of 3 1 2 3
#1062507 - 06/25/19 04:44 AM Re: McLeod RST clutch install [Re: mmc427ss]  
Joined: Jan 2000
Posts: 4,361
mmc427ss Online content
15+ Year
mmc427ss  Online Content
15+ Year
Member

Joined: Jan 2000
Posts: 4,361
Pottstown, Pa
On Fri had to put the priorities in order. First pickup a new water heater in the afternoon, get the 86 out for some miles on the clutch and fill the tank for the Sat trip to Carlisle, wash the car and make it a 50 footer again. Sat up early to be parked in Carlisle by 9. Oh, water heater I did sweat the copper lines in on Sun afternoon after a Cars and Coffee thing in the morning. You need to get your priorities in order.

Very happy with the clutch pedal effort, easy to push. It takes some getting used to, seems to grab high in the pedal stroke. Pulling out in 1st gear requires just a little finesse to leave softly. I do think as the disc get broke in this will get better. Once moving the up shifts are much smoother than the previous clutch. When downshifting the clutch bites abruptly, this I think due to the fact the dics don't have a spring hub.

Have been playing with the linkage changing ratios of the arms to try and optimize the clutch engagement verses pedal travel. Did some measurements tonight of the various travel points in the linkage, the fork rod being the most important. Currently 1" travel at the end of the fork which translate to .466" at the throwout bearing, this includes the freeplay. Standard GM fork ratio is 2.33:1. Will make a call to McLeod to pick there brain about finger travel on these clutches. Because the intent is that this new RST needs to be the clutch for the future it needs to be made as good as it can get now.

The 115 mile trip to Carlisle Sat went flawlessly. The alternator R&R done earlier in the week was a success. With the cruise set at 72, engine running at 2400 rpm , A/F meter showing a consistent 15.2, mpg was 21 for the 235 round trip. Not bad for a 427 SBC with an antique carb, 4.11 gears and an R12 A/C cranking.

Only when a long turnpike trip is on the schedule does the carb to cruise diaphragm rod get installed, all other times it's pulled off. I did learn a little lesson about how to make the cruise operate a little smoother at turnpike speed. Simply lube the rod to diaphragm point and the apply is SO much smoother. never paid much attention there before. Just installed the rod and thought the old 86 cruise system was a little abrupt. Gotta remember that for the 200 mile trip to UMI in Aug which will be several hours using the cruise. Did I mention how nice it is have a cruise with a T56, SWEET.

So far haven't noticed any 3rd 4th shifting problems because of one of the three keys is not installed any more. Time will tell but it appears that can be something to deal with if, when, it's time to open up the T56 again.
One of the reason to pull the flywheel was to see if the freeze plugs in the back of the block were leaking, that was a, NO, they were fine. Tonight had antifreeze stains on the bell housing again, not as much as before. Before the Sat trip dropped two more dissolved stop leak pills in the rad. Did they help, maybe, but still need to find the pisser. Starting to suspect a head gasket at the back of #8. Can't be a head bolt as all the head bolts on a Dart block are blind. The leak appears to be more when I run the engine hard, more rpm, more cyl pressure. Just hate the thought of pulling the heads on this engine.

As far as the RST choice goes I think it was the right clutch at this time, my left leg is thankful, my wife will like the smoother engagement, as the disc break in feel should get better, rated at 700 lbft it's overkill, insurance.
Bob

#1062513 - 06/25/19 07:38 PM Re: McLeod RST clutch install [Re: mmc427ss]  
Joined: Jun 2006
Posts: 1,690
Travis Jones Offline
10+ Year
Travis Jones  Offline
10+ Year
Member

Joined: Jun 2006
Posts: 1,690
Ferndale, MI
Originally Posted by mmc427ss

One of the reason to pull the flywheel was to see if the freeze plugs in the back of the block were leaking, that was a, NO, they were fine. Tonight had antifreeze stains on the bell housing again, not as much as before. Before the Sat trip dropped two more dissolved stop leak pills in the rad. Did they help, maybe, but still need to find the pisser. Starting to suspect a head gasket at the back of #8. Can't be a head bolt as all the head bolts on a Dart block are blind. The leak appears to be more when I run the engine hard, more rpm, more cyl pressure. Just hate the thought of pulling the heads on this engine


any chance it could be from the intake? I've seen coolant run exactly down the seam between the head and block and enter the bellhousing on a small block chevy before...


86 SS 6.0L LQ4, TBSS GEN IV intake, 92mm TB, 30lb injectors, Summit Stage 3 NA Cam, Stainless long tube headers, Stainless 3in exhaust, Microsquirt ECU, FABbot AR5 5-speed, Torsen LSD, QA1 Lvl 3 Suspension Kit, UMI Front & Rear Braces. Check out my build blog on Summit Racing's OnAll Cylinders https://www.onallcylinders.com/author/travis-jones/
#1062536 - 06/27/19 01:39 PM Re: McLeod RST clutch install [Re: mmc427ss]  
Joined: Jan 2000
Posts: 4,361
mmc427ss Online content
15+ Year
mmc427ss  Online Content
15+ Year
Member

Joined: Jan 2000
Posts: 4,361
Pottstown, Pa
Travis you got me thinking about a coolant leak at the rear of the intake. That's a very hard area to view with all the stuff located back there.
Because the intake gaskets are failing again (pushing the corners) it was time to pull the intake and look at gaskets. Have a 400 mile round trip in the car in Aug and needed to get that fixed before then. So last night pulled the intake and it's 100 little pieces to fix the gaskets.. The intake gaskets where oil soaked, but no sign of leaking at the coolant passages. Yep some of the bolts showed they had coolant on the threads but nothing to say they leaked. The amount of oil in the head passages and on the stem of the intake valves says the oil seeping at the intake gaskets has been a problem for awhile. The reason oil consumption has be more for this engine.

#1062540 - 06/27/19 02:40 PM Re: McLeod RST clutch install [Re: mmc427ss]  
Joined: Dec 2007
Posts: 5,927
SSLance Offline
10+ Year
SSLance  Offline
10+ Year
Member

Joined: Dec 2007
Posts: 5,927
Peoria, AZ
Having just pulled the intake on one of these, I commiserate...and feel your pain.

Hope you discover the leaky culprit soon...


Lance
1985 Monte Carlo SS Street Car
#1062567 - 06/28/19 06:27 AM Re: McLeod RST clutch install [Re: mmc427ss]  
Joined: Jan 2000
Posts: 4,361
mmc427ss Online content
15+ Year
mmc427ss  Online Content
15+ Year
Member

Joined: Jan 2000
Posts: 4,361
Pottstown, Pa
Well the intake manifold is sitting on a bench at my TIG guys shop. Will have more material welded to the outside, top of the three runners I should have fixed when I had 5-7 area fixed. Hindsight,
Will be starting a new intake topic in ENGINES, Gotta put his RST topic to bed for awhile.

Have had the car out several times now, over 300 miles on the clutch. Break-in only about 1/2 done. I do believe it takes a lot of shifts and driving time to get the disc fully run in, there are now six faces instead of four that need to bed. Even though this is the smallest, lightest duty McLeod it's still good for 700 lbft, and the disc are not sprung so engagement can be snappy. I will give it time and see how it behaves at the end of the Summer.

The clutch linkage is now tweaked for best ratios obtainable. Pedal is very light, you have to relearn driving the clutch. Going from a very firm to a very comfortable pedal was a goal for the new clutch. YEA!
Still have to figure out how to check the disc air gap at full disengagement. The feel of the pedal as you engage the clutch tell you where engagement happens and the amount of travel below that is what you need to be careful about. After driving three different clutch in this car over the past 17 years you have a good idea how to drive this clutch. It's a feel thing right now.

Other than the coolant leak I'm chasing no signs of ATF anywhere yet so maybe the new front seal in the T56 fixed that. Trans vent tube leak fixed, no leaking at the speedo housing, no leaking from the rear seal, no leaking from the yoke plug in the driveshaft. YEA.

Trans 3/4 shifting is OK despite one of the three keys is laying on the bench. Neutral detent is the primary duty of the keys, neutral feels OK. Until it become necessary to fix that problem will continue to baby that 3/4 syncro. No interest in opening up the T56 again for parts.

The only issue I have with the whole clutch project is i still have a binding feel in the pedal when the engine is off. Drive the car down the road and it's not noticeable at all. Every piece of the linkage has been removed and R&R'ed, I know the binding is not in the linkage. There are three QA1 rod ends used. This binding has plagued this stick setup for all three clutches. The suspect is always the same, throwout bearing chattering on the bearing retainer when pressure is applied to disengage the clutch. Have installed three retainers over the years, the last one I had hard chromed which stopped the heavy wear on the retainer. Have chamfered the inner edges of the throwout bearing, used a moly lube on the friction areas. Just can't put my finger on a cure.

So much for this clutch project, it's time to move on, lots of other things need done. Retirement isn't easy, it keeps you real busy.
Later
Bob

#1062712 - 07/14/19 12:27 AM Re: McLeod RST clutch install [Re: mmc427ss]  
Joined: Aug 2007
Posts: 1,011
pearl83SS Offline
Member
pearl83SS  Offline
Member

Joined: Aug 2007
Posts: 1,011
Chicago
Cool project. Might I ask how you installed your shifter boot to the console ?


83 ss monte, 383c.i., Holley 750, super 40's, 350 trans, 9" w/ 3.70's

http://s183.photobucket.com/albums/x67/pearl83SS/
Page 3 of 3 1 2 3

Random Images
809/thumbs/monteeee.jpg
by jenifuriouSS
1113/thumbs/BadAssFender1.jpg
by Z65_Paul
500/thumbs/dad_his_flowers_35_.jpg
by BENCHSEATRACIN
500/thumbs/DSC03034_1_.jpg
by Rodney
1164/thumbs/IMGP6656small.jpg
by Witman69
Help MonteCarloSS.com


Recent Contributors
OneOwner85
Authorized Vendors
Tell them you saw it
on MonteCarloSS.com!


CustomMonteSSParts.com
Dixie Monte Carlo Depot
GSI Interiors
HRpartsNstuff
Mikes Montes
Savitske Classic & Custom
Powered by UBB.threads™ PHP Forum Software 7.6.0