Go back to home



We have detected that you are using ad blocking software.
The MR2 Australia forum is made possible by ad revenue.
Please disable your ad blocker to ensure that this site lives on.

Hot!Exhaust manifold gasket change

Page: < 12 Showing page 2 of 2
Author
stuka
MR2 Deity
  • Total Posts : 1171
  • Scores: 100
  • Reward points: 3843
  • Joined: 2011/04/07 19:51:15
  • Status: offline
Re: Exhaust manifold gasket change 2018/07/09 08:02:02 (permalink)
0
Good on you for giving this a go, take your time and you will be alright. Do you have a copy of the workshop manual BGB PDF? It should have diagrams of the turbo and ancillaries in there.
 
If you don’t undo the turbo oil feed hard line you will be in sorts of strife and you will end up damaging/bending it. This is the combined hard pipe that also returns oil to the sump, it would be easiest to undo the banjo bolt from the block. It’s a big one, maybe 32mm but cant remember exactly.
#16
maccardo94
MR2 Enthusiast
  • Total Posts : 73
  • Scores: 1
  • Reward points: 994
  • Joined: 2016/04/17 00:04:54
  • Status: offline
Re: Exhaust manifold gasket change 2018/07/09 10:14:01 (permalink)
0
No i dont have the pdf. Where can i find this? Also should i drain the oil lines. Or plug them up when i remove them. Or are they only pumping when the engine is going if that makes sense

Sent from my CPH1725 using Tapatalk

#17
stuka
MR2 Deity
  • Total Posts : 1171
  • Scores: 100
  • Reward points: 3843
  • Joined: 2011/04/07 19:51:15
  • Status: offline
Re: Exhaust manifold gasket change 2018/07/09 12:13:21 (permalink)
0
Im not sure where you download it, someone else on here might know.
 
The oil lines drain when the engine is not operating
#18

Mrskylighter
MR2 Deity
  • Total Posts : 2150
  • Scores: 169
  • Reward points: 4066
  • Joined: 2011/04/07 19:51:15
  • Location: NSW Australia, Hills District
  • Status: online
Re: Exhaust manifold gasket change 2018/07/09 13:03:26 (permalink)
0
The manifold you have is somewhat rare. It is from a Celica GT4 Group A Rallye/ WRC anti lag setup. 
 
Here's a pic of the complete setup. It is not is use on the production car though. Just fitted for Homologation purposes.
 

 
http://gtfour.supras.org.nz/homologation.htm
 
Anti-Lag
The Group A was the first production car I know of with anti-lag standard, although again not operational. The system uses an ECU signal to switch two VSV's on the back of the block which provide vacuum (via a canister) to the special bypass valve fitted right beside the entrance to the IC. This heavy duty metal valve has a poppet valve which when opened directs some of the air (which usually all goes through the BOV) down four metal tubes into the exhaust manifold. A special manifold has a hole just after each exhaust port. A small heatshield sits between the manifold and the intercooler.
 
How do you make it work? You don't.
 
Anti-lag is *very* hard on turbos due to the shockwaves and high temperatures produced. Unless you have a rally team budget, forget it.
 
Here is some of what you need to do to activate it. My bypass valve seems to be jammed shut, maybe it has an internal spacer to stop it opening. The fittings connecting the pipes to the manifold are also not drilled though. With those aspects fixed the system will mechanically work. The VSV's are wired to the ECU, however an aftermarket ECU is needed to apply 12V to make them work. I'm guessing that (like most systems) the ECU retards the timing while continuing fuel injection. The mixture burns in the manifold, keeping the turbo spinning. This is very harsh on the system, therefore the pipes are just to supply cool air to keep temperatures down (conjecture!).
 
 

1989 AW11 Gen3 3sgte
#19
maccardo94
MR2 Enthusiast
  • Total Posts : 73
  • Scores: 1
  • Reward points: 994
  • Joined: 2016/04/17 00:04:54
  • Status: offline
Re: Exhaust manifold gasket change 2018/07/09 19:56:22 (permalink)
0
Awesome good stuff! Nice research too

Sent from my CPH1725 using Tapatalk

#20
Page: < 12 Showing page 2 of 2
Jump to:

© 2018 APG vNext Commercial Version 5.5