Why You Should Never Use Delrin Diff Mounts
06-02-2005, 01:07 AM
#12
Senior Member
Join Date: Dec 2003
Posts: 203
[quote name='Cheers!' date='Jun 1 2005, 06:27 PM']So I made my self some fancy delrin rear diff mounts.
Guess what? DO NOT EVER USE THOSE. ESPECIALLY if you have a racing beat torque brace for the engine.
Anyone want to guess what the outcome is? I'll put up pics after I get out of the shower
[/quote]
One of the cars I built used:
Delrin upper diff mounts, steel tranny mounts, steel engine mounts, steel front diff mount, steel torque limiter (no shock like the racing beat unit incorporates).
I built all of the mounts myself. I don't like using aluminum pucks in place of the stock mounts, so I welded new engine mounts altogether that mount directly to the subframe. For the tranny, I made a one piece unit to replace the entire crossmember assembly. The torque limiter was incorporated to the rear of a triangulated strut tower bar.
The car has yet to see any problems other than excessive NVH to the driver, and it has been running for a while now....
Between the two of us, one of us will be an isolated incident.
Guess what? DO NOT EVER USE THOSE. ESPECIALLY if you have a racing beat torque brace for the engine.
Anyone want to guess what the outcome is? I'll put up pics after I get out of the shower
[snapback]720020[/snapback]
[/quote]
One of the cars I built used:
Delrin upper diff mounts, steel tranny mounts, steel engine mounts, steel front diff mount, steel torque limiter (no shock like the racing beat unit incorporates).
I built all of the mounts myself. I don't like using aluminum pucks in place of the stock mounts, so I welded new engine mounts altogether that mount directly to the subframe. For the tranny, I made a one piece unit to replace the entire crossmember assembly. The torque limiter was incorporated to the rear of a triangulated strut tower bar.
The car has yet to see any problems other than excessive NVH to the driver, and it has been running for a while now....
Between the two of us, one of us will be an isolated incident.
06-02-2005, 01:08 AM
#13
Senior Member
Join Date: Dec 2003
Posts: 203
[quote name='Cheers!' date='Jun 1 2005, 06:55 PM']=(
it's leaking tranny oil... i noticed a nice spot under the car today as I lifted it up. I wonder if ithat is what is killing my clutch... i opened up the inspection plate and could not tell if the disc was wet or not... will drop it tommorrow
[/quote]
Your pictures don't look like anything outside of the normal casting cracks... all of the tranny casing have them, even brand new trannies.
it's leaking tranny oil... i noticed a nice spot under the car today as I lifted it up. I wonder if ithat is what is killing my clutch... i opened up the inspection plate and could not tell if the disc was wet or not... will drop it tommorrow
[snapback]720032[/snapback]
[/quote]
Your pictures don't look like anything outside of the normal casting cracks... all of the tranny casing have them, even brand new trannies.
06-02-2005, 06:58 AM
#14
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Thread Starter
Join Date: Nov 2002
Posts: 3,108
[quote name='scathcart' date='Jun 2 2005, 01:08 AM']Your pictures don't look like anything outside of the normal casting cracks... all of the tranny casing have them, even brand new trannies.
[/quote]
I guess I just have no other tranny to compare to that is what is giving me concerns. I did notice it's leaking. THe bottom of the tranny is all wet with fluid, and a spot of tranny oil built up on the ground rught underneth the inspection cover / bell housing. I opened it and took a look see, and the flywheel looked dry and the disc looked a bit worn.
Right now i'm trying to figure out where a tranny would leak from. The drive shaft looks dry as well so it doesn't appear to be the rear seal. THe flywheel and PP look dry so that might rule out the front seal. The neutral/reverse switch was soaked in tranny fluid as well as the starter. Quite a bit must have leaked out because the presilencer was oily. However when I drained the tranny I got alot of oil out. I wonder where it is coming from.
[snapback]720120[/snapback]
[/quote]
I guess I just have no other tranny to compare to that is what is giving me concerns. I did notice it's leaking. THe bottom of the tranny is all wet with fluid, and a spot of tranny oil built up on the ground rught underneth the inspection cover / bell housing. I opened it and took a look see, and the flywheel looked dry and the disc looked a bit worn.
Right now i'm trying to figure out where a tranny would leak from. The drive shaft looks dry as well so it doesn't appear to be the rear seal. THe flywheel and PP look dry so that might rule out the front seal. The neutral/reverse switch was soaked in tranny fluid as well as the starter. Quite a bit must have leaked out because the presilencer was oily. However when I drained the tranny I got alot of oil out. I wonder where it is coming from.
06-02-2005, 07:31 AM
#16
Senior Member
Join Date: Feb 2004
Location: Orange Park FL
Posts: 363
Many castings have those lines.
The aluminum was a little cool, and/or the flow was a little slow when it was cast.
The result is not perfect, but still probably up to spec.
I suspect a loose neutral or reverse switch or maybe the linkage seal.
The aluminum was a little cool, and/or the flow was a little slow when it was cast.
The result is not perfect, but still probably up to spec.
I suspect a loose neutral or reverse switch or maybe the linkage seal.
06-02-2005, 09:11 PM
#17
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Thread Starter
Join Date: Nov 2002
Posts: 3,108
Ok so the clutch is in perfect condition. Flywheel is in perfect condition. Pressure Plate in perfect condition
Anyone want to take a guess why it started to slip? I'll give you guys 3 chances before I reply back with the answer.
Anyone want to take a guess why it started to slip? I'll give you guys 3 chances before I reply back with the answer.
06-02-2005, 09:25 PM
#18
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Join Date: Dec 2003
Posts: 203
[quote name='Cheers!' date='Jun 2 2005, 03:58 AM']Right now i'm trying to figure out where a tranny would leak from. The drive shaft looks dry as well so it doesn't appear to be the rear seal. THe flywheel and PP look dry so that might rule out the front seal. The neutral/reverse switch was soaked in tranny fluid as well as the starter. Quite a bit must have leaked out because the presilencer was oily. However when I drained the tranny I got alot of oil out. I wonder where it is coming from.
[/quote]
Take out the guess work and get a leak detection kit.
Cdn tire sells an alright one for $50, meant for use in the oil system. You throw in some dye, run the engine, wear some fancy goggles, shine a fancy flashlight, and then wait for the fancy fluid glow to show up.
No reason you couldn't put it in your tranny, disconnect your halfshafts at the rear pumpkin, set the car on jackstands, get proper exhaust ventilation,. and then run the car with cruise control on.
You'll see exactly where the leak was coming from.
Works for me.
[snapback]720153[/snapback]
[/quote]
Take out the guess work and get a leak detection kit.
Cdn tire sells an alright one for $50, meant for use in the oil system. You throw in some dye, run the engine, wear some fancy goggles, shine a fancy flashlight, and then wait for the fancy fluid glow to show up.
No reason you couldn't put it in your tranny, disconnect your halfshafts at the rear pumpkin, set the car on jackstands, get proper exhaust ventilation,. and then run the car with cruise control on.
You'll see exactly where the leak was coming from.
Works for me.
06-02-2005, 09:29 PM
#19
Senior Member
Join Date: Dec 2003
Posts: 203
[quote name='Cheers!' date='Jun 2 2005, 06:11 PM']Ok so the clutch is in perfect condition. Flywheel is in perfect condition. Pressure Plate in perfect condition
Anyone want to take a guess why it started to slip? I'll give you guys 3 chances before I reply back with the answer.
[/quote]
1. Too much power. (unlikely)
2. Step machined into flywheel... but thats not really a perfect flywheel.
3. sticking clutch hydraulics causing the pressure plate to be pratially disengaged all the time.
4. Incorecctly adjusted clutch pedal freeplay causing patrial pressure plate disnegagement at all times.
5. You put the clutch disc in backwards.
(That one had better not be it!)
Anyone want to take a guess why it started to slip? I'll give you guys 3 chances before I reply back with the answer.
[snapback]720506[/snapback]
[/quote]
1. Too much power. (unlikely)
2. Step machined into flywheel... but thats not really a perfect flywheel.
3. sticking clutch hydraulics causing the pressure plate to be pratially disengaged all the time.
4. Incorecctly adjusted clutch pedal freeplay causing patrial pressure plate disnegagement at all times.
5. You put the clutch disc in backwards.
(That one had better not be it!)
06-02-2005, 09:32 PM
#20
Senior Member
Thread Starter
Join Date: Nov 2002
Posts: 3,108
[quote name='scathcart' date='Jun 2 2005, 09:29 PM']1. Too much power. (unlikely)
2. Step machined into flywheel... but thats not really a perfect flywheel.
3. sticking clutch hydraulics causing the pressure plate to be pratially disengaged all the time.
4. Incorecctly adjusted clutch pedal freeplay causing patrial pressure plate disnegagement at all times.
5. You put the clutch disc in backwards.
(That one had better not be it!)
[/quote]
well since i'm honored by having scathcart post in my thread I'll answer. (no disprespect with the sarcasim ofcourse, i just think your one of the smarter rx7 guys around).
THe Disc still has 60+% life left in it. THe flywheel has no heat damage and is in
mint mint condition. Looks like it was just resurfaced, which i did less than 20,000 kms ago.
The culprit... The breather decided to stop working. So when you are at the track and you are running her real hard the air has to go somewhere. With the breather clogged up the air has no where to go. So where does it go???? IT PUSHES OIL PASS THE FRONT AND REAR MAIL OIL SEALS !!!!!!
arggghhh!!!!!!!!!!!! Immediately when I took a close look at the tranny I could see a nice spray pattern of oil near the tail of the tranny and oil dripping from the inspection plate.
So i have a perfectly good clutch disc ruined because it's completely
soaked in oil then got cooked in. I'm not a happy camper.
That and I just spent 630 bucks on a a SPEC aluminum flywheel and their stage 3 clutch kit. I'm getting contingency sponsor from them as well as a 25% front end sponsorship. I would rather not have had to change anything. I was content on my OEM setup...
2. Step machined into flywheel... but thats not really a perfect flywheel.
3. sticking clutch hydraulics causing the pressure plate to be pratially disengaged all the time.
4. Incorecctly adjusted clutch pedal freeplay causing patrial pressure plate disnegagement at all times.
5. You put the clutch disc in backwards.
(That one had better not be it!)
[snapback]720511[/snapback]
[/quote]
well since i'm honored by having scathcart post in my thread I'll answer. (no disprespect with the sarcasim ofcourse, i just think your one of the smarter rx7 guys around).
THe Disc still has 60+% life left in it. THe flywheel has no heat damage and is in
mint mint condition. Looks like it was just resurfaced, which i did less than 20,000 kms ago.
The culprit... The breather decided to stop working. So when you are at the track and you are running her real hard the air has to go somewhere. With the breather clogged up the air has no where to go. So where does it go???? IT PUSHES OIL PASS THE FRONT AND REAR MAIL OIL SEALS !!!!!!
arggghhh!!!!!!!!!!!! Immediately when I took a close look at the tranny I could see a nice spray pattern of oil near the tail of the tranny and oil dripping from the inspection plate.
So i have a perfectly good clutch disc ruined because it's completely
soaked in oil then got cooked in. I'm not a happy camper.
That and I just spent 630 bucks on a a SPEC aluminum flywheel and their stage 3 clutch kit. I'm getting contingency sponsor from them as well as a 25% front end sponsorship. I would rather not have had to change anything. I was content on my OEM setup...