forced Posted April 7, 2010 Share Posted April 7, 2010 Does the exhaust pipe have a partial blockage in it? The ONLY time I've ever blown out exhaust gaskets is when I've had a turbo sitting after the gasket which of course causes a build up of pressure at the manifold. Steve Quote Link to comment Share on other sites More sharing options...
Cazza Posted April 8, 2010 Author Share Posted April 8, 2010 lol it definately doesnt have a turbo. nah no blockages. did have the exhaust rehung and put in flexi and it all looks pretty good but yeah i will definately have a look at the extra brace option. uterus- it ALWAYS blows straight up the top of #4. everytime. Quote Link to comment Share on other sites More sharing options...
Cazza Posted April 18, 2010 Author Share Posted April 18, 2010 Brace your exhaust to your bellhousing, it can make a huge difference.I had issues with an older set of extractors on my old van that kept snapping within an inch of number 4 port, I added a fairly heavy brace to the bellhousing which cured the problem. I also had the same prob as you with blowing the gasket at number 4 with brand new extractors, again a brace solved the problems. anyone have a photo of their braces for this that i can have a gander at/blatantly copy? Quote Link to comment Share on other sites More sharing options...
Cazza Posted April 19, 2010 Author Share Posted April 19, 2010 *bump* keen as to attempt bracket build - need pics though please? as my engineering skills are somewhat lacking to say the least... Quote Link to comment Share on other sites More sharing options...
Toucan Posted April 19, 2010 Share Posted April 19, 2010 Be different depending on exhaust. A strap of steel bolted between gearbox and an exhaust clamp would do the trick. Quote Link to comment Share on other sites More sharing options...
shizzl Posted April 20, 2010 Share Posted April 20, 2010 Be different depending on exhaust.A strap of steel bolted between gearbox and an exhaust clamp would do the trick. totally.. most are bolted to one of the bellhousing bolts. an easy model: get a saddle clamp (exhaust clamp) and put it on the front pipe roughly next to the bellhousing(dont tighten the clamp all the way up yet). take a bit of flat bar 25-40mm wide and 5-8mm thick and however long youll need it. drill a hole in one end big enough for a bellhousing bolt to go through. measure how far away from the bellhousing the saddle clamp is and make a right angle bend so the flat bar sits against the saddle clamp base when its bolted to the bellhousing. then weld the flat bar to the saddle clamp base. i can take some pics of one and put them up tomorrow if you like.. i have 3 hilux's booked in for exhaust jobs tomorrow...most popular for repairs these things but they do usually have good clamps/brackets... lastly tighten the saddle clamp bolts(do this last)... done Quote Link to comment Share on other sites More sharing options...
dwlee Posted April 20, 2010 Share Posted April 20, 2010 I had similar problems with a GTO where the cast manifold (4 into 2) joins to a pipe 2 into 1 section before joining the exhaust pipe proper. I tried a brace (original), no brace, flexi section, new 2 into 1 pipe section, surface planing ....etc. The joint would only last about 4 weeks Max It didn't matter what I did until I threw the cast manifold away and made some 4-2-1 headers. I have not had a problem since (3 years) . Did your old manifold blow in the same place as the replacement you are now using? Quote Link to comment Share on other sites More sharing options...
Cazza Posted April 21, 2010 Author Share Posted April 21, 2010 i can take some pics of one and put them up tomorrow if you like.. thankyou for the instructions! will totally be following those this wknd- but yes if you could get photos then that would be super helpful also (like i said-im a bit of a munce when it comes to engineering-need all the "paint-by-numbers" kinda help that i can get... Quote Link to comment Share on other sites More sharing options...
Cazza Posted April 21, 2010 Author Share Posted April 21, 2010 I had similar problems with a GTO where the cast manifold (4 into 2) joins to a pipe 2 into 1 section before joining the exhaust pipe proper. I tried a brace (original), no brace, flexi section, new 2 into 1 pipe section, surface planing ....etc. The joint would only last about 4 weeks Max It didn't matter what I did until I threw the cast manifold away and made some 4-2-1 headers. I have not had a problem since (3 years) .Did your old manifold blow in the same place as the replacement you are now using? nah old manifold didnt used to blow- replaced it cause it had massive cracks all through it Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.