What part of the stock solenoids actually fails?
#2
RX-7 Bad Ass
iTrader: (55)
I have cut a bad one open, but didn't find anything conclusive. I think the culprit is the rubber seals in the solenoid vulcanize and don't seal properly. It's a magnetic winding that moves the solenoid back and forth.
Dale
Dale
#3
Place your ad here...
There are three main failure points of the stock solenoids. The first is the nipples. They become hard and brittle, and are prone to cracking and breaking (especially when servicing the vacuum lines). The second (as Dale pointed out) is the internal rubber seal. When these fail, you get air leaks. The third is the actual solenoid operator. This is the electrical coil that, when energized, causes the seal to engage/disengage. This is a very common failure and often hard to diagnose. Often, the operator can fail intermittently and at high temperatures. In other words, it works fine when you test it on the bench, but when the solenoid is up to engine operating temps, it fails. This is due to the internal coating on the operator disintegrating over time.
I'm currently testing a new aftermarket solenoid setup that will hopefully cure most (if not all) the concerns with the stock solenoids.
-Rob
I'm currently testing a new aftermarket solenoid setup that will hopefully cure most (if not all) the concerns with the stock solenoids.
-Rob
#4
Rotary Enthusiast
Have not disected one yet. Historic info:
1) known to pass bench test cold, but fail bench test when 150-200F.
2) known to pass bench test cold, and not work properly installed and under pressure/vacuum load.
I had occasional lower boost, somewhat related to track events. New TCA and CCA solenoids and problem stopped.
1) known to pass bench test cold, but fail bench test when 150-200F.
2) known to pass bench test cold, and not work properly installed and under pressure/vacuum load.
I had occasional lower boost, somewhat related to track events. New TCA and CCA solenoids and problem stopped.
#5
Place your ad here...
You're right. I forgot to mention that. Failing under load is typcally due to the rubber seal failing, but in some cases it can also be attributed to a bad operator. Hopefully, this info will help some people. Keep in mind that just because you tested it on the bench cold, doesn't mean that it works at operational capacity.
Also, just as an FYI the TCA (pressure) is one of the most commonly failed solenoids that cause turbo problems. I have had so many of these go bad, I lost count.
-Rob
Also, just as an FYI the TCA (pressure) is one of the most commonly failed solenoids that cause turbo problems. I have had so many of these go bad, I lost count.
-Rob
#6
Rotary Freak
iTrader: (8)
Originally Posted by saxyman990
There are three main failure points of the stock solenoids. <SNIP>
I'm currently testing a new aftermarket solenoid setup that will hopefully cure most (if not all) the concerns with the stock solenoids.
-Rob
I'm currently testing a new aftermarket solenoid setup that will hopefully cure most (if not all) the concerns with the stock solenoids.
-Rob
I was thinking about using the Mercedes solenoids. . .
:-) neil
Mercedes pn# 001 540 86 97, WorldPac pn# O4045-70190
#7
Place your ad here...
Originally Posted by M104-AMG
Rob, please share your aftermarket solenoid setup.
I was thinking about using the Mercedes solenoids. . .
:-) neil
I was thinking about using the Mercedes solenoids. . .
:-) neil
I posted a thread with some preliminary information in it. I'm not done testing, but I'll have an update fairly soon. Here's the thread:
https://www.rx7club.com/3rd-generation-specific-1993-2002-16/custom-replacement-solenoid-system-404243/
-Rob
Trending Topics
#8
Got Rotors?
iTrader: (1)
Join Date: Aug 2004
Location: Des Moines, Iowa
Posts: 580
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by saxyman990
Neil, the mercedes solenoids look like they would possibly work, but I would be afraid that the internals are similar to the stock FD ones (rubber seals, non-molded coil, etc). I would have to look at them and examine the internals to be sure (just like I did for the stockers).
I posted a thread with some preliminary information in it. I'm not done testing, but I'll have an update fairly soon. Here's the thread:
https://www.rx7club.com/showthread.php?t=404243
-Rob
I posted a thread with some preliminary information in it. I'm not done testing, but I'll have an update fairly soon. Here's the thread:
https://www.rx7club.com/showthread.php?t=404243
-Rob
-David
#10
Place your ad here...
Originally Posted by Stix37867
What kind of problems have you had so far with your system? I need basically all new solenoids because i'm doing a vacuum hose job and keep breaking the plastic ends off of them. If you get it working fairly soon, i'll pay for another prototype the same day they work. I've already broken over $300 worth of the factory solenoids. Post with updates on how it turns out.
-David
-David
-Rob
#12
Place your ad here...
The operators are manufactured by Peter Paul electronics. They do a lot of stuff for the automotive world, so they were a pretty knowledgable source of information for me.
Thread
Thread Starter
Forum
Replies
Last Post
trickster
2nd Generation Specific (1986-1992)
25
07-01-23 04:40 PM
Frisky Arab
2nd Generation Specific (1986-1992)
13
08-18-15 05:30 PM