Exhaust manifold leaks

shelooner · Post by **shelooner** » Tue Jun 21, 2005 6:41 pm

Hi, I have a surf powered by a 308 hodden, currently there are no flexi joints inthe system, and i have problems with gaskets sealing between the head and the manifold. I think flexi joints may help this, but I'm also wondering how sturdy they are, should i get some and weld em in?

Cheers
Scottie

mumad · Post by **mumad** » Tue Jun 21, 2005 6:46 pm

If it is a manufactured flexi joint then you can weld them in, But if its that flexabile stainless pipe then seal and clamp it. I would just about recommend claping either way so that its easier to remove later on.

pinky · Post by **pinky** » Wed Jun 22, 2005 7:18 pm

you should not need to have flexi joints fitted .but have you checked that your manifold is not warpped as this is the most common problem . but i could be wrong :?:

as im not quite perfect yet .

wopass · Post by **wopass** » Wed Jun 22, 2005 10:14 pm

is the exhaust system rubber mounted or ridged to the body/chassis, if it is ridged to the body/chassis you will have problems all the time as the motor flexes on the engine mounts and strains against the rest of the pipe

or as pinky says,warped manifold face, get it planed/milled flat,new gasket,bolt it up with some maniseal,then fit slip clamp which it should have from block/bellhousing of motor to hold the pipe firm,if it doesnt have clamps then this will also make your problem worse

flexi pipe does help reduce the flex and vibration transfer through to the manifold from the rest of the system and are a good thing to have,but on an old holden motor... i dont think a little bit of extra vibration is gonna hurt it.if your gonna put flexi pipe in, put 1 short piece on each drop pipe just before the collector/balance tube, this will reduce vibration/flex transfer thru to the manifold..... :wink:

my 5c... probably just said a whole bunch of shit you allready knew :roll:

...hehhe ahh well,, at least my typing is getting better

shelooner · Post by **shelooner** » Thu Jun 23, 2005 5:04 pm

Cheers fellers,
its all rubber mounted to the chasis and dont think there are clamps to the block...ill have to look into that one
makes sence that the flange could be warped.. cuz one side seems to be worse than the other..

Thanks

Scottie

Post by **mike** » Thu Jun 23, 2005 10:57 pm

If you decide to you need to take a lick off the face and don't need it same day I can do it quite easily at work for you. Offer is on the table :wink:

Mike

wopass · Post by **wopass** » Fri Jun 24, 2005 8:03 am

should have clamps on the bell housing or block to hold that piece of pipe ridged to the manifold so no flex occurs there, but be rubber mounted from there back... if that makes sense :wink:

shelooner · Post by **shelooner** » Sat Jun 25, 2005 11:53 am

thanks mike, I think Ill take you up on that offer, are you in chch? it might take me a little while to get timing right to borrow a car for a couple of days, but ill sort it out, whats your phone number ill call you about it.

Thanks

Scottie

Post by **mike** » Sat Jun 25, 2005 9:42 pm

Yup in Christchurch. No worries just when ever you get a chance, the work machines arnt going anywhere :wink:

phone 9810911

Mike