exhaust manifold

Hi i have a leaky exhaust manifold and need new gaskets on which is the best bolts to use to bolt the manifold back on and to secure them in place

threads are unc ,and best answer is to buy stud kit ,locktite studs in

or reuse the original bolts thow the tabs away and use spring washers just as good

i ditched the tabs in place of bone stock flat washers and new gaskets.

no leaks nearly a year later. result.

oh yeah i think the size is 3/8" UNC x 1 1/16" but i could only get 3/8" UNC x 1 1/8" and they fitted fine. i used stainless bolts and flat washers.

cheers

I have just brought a standard full system for a 3.5 defender. Mine Is a 3.9 efi but was out a disco so original exhaust didn't fit, got the 3.5 system as I wanted to do away with the cats. But now the down pipes from the system I have just purchased don't match up with the manifolds from engine??? Any ideas???

Change the manifolds, modify the pipe flanges to suit the existing manifolds, or remove the cats from the 3.9 Y pipe.

sible88 said:

I have just brought a standard full system for a 3.5 defender. Mine Is a 3.9 efi but was out a disco so original exhaust didn't fit, got the 3.5 system as I wanted to do away with the cats. But now the down pipes from the system I have just purchased don't match up with the manifolds from engine??? Any ideas???

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cut a feckin hole in the bonnet and stick em out that.fook the exhaust pipe.go in drag dude...it suits you.

I just skipped some tubular manifolds theyre in the garden in th escrap bin if you want them Only think they are good for scrap tho TBH they need welding back together after somone cut them off to make them any good. Just about to fit early RRC manifolds to the 80 inch as they are much tighter to the chassis rails than later ones. Not as big and manly tho but I'll take a nice exhaust run over a big bore cut and shut anyday.

Sible,

My brother used hedman headders (cant remember the size probably 3 inch I think I have a pair of 3.5 inch or 2.5 inch here that they never used boxed) from Real Steel and lots of 3 inch sections to make up a pattern exhaust. Then went to a local performance place that bent up 2 exhaust systems minus turbo mufflers these again got from Real Steel for the 90. I will ask but they were like only £40/50 each exhaust and the muffler was only like 30 quid. The hard part was making the pattern with plenty of room around it and keeping it up protected out of harms way. Fastest 90 I've ever driven (only 15 at the time in my brothers workshop) took many sessions on a rolling road to get the 3.5L jetted correctly but once it was it was soo darn good. I'll ask for the final read out from the rolling road sessions it was some stupid torque figure enough for the engineers to question the actual CC twice.

The beauty about the 3.5 is that you can compete in upto 3.5L class in some comps and if you have a well sorted engine you could out perform the average rebuilt 3.9's and some of the later larger engines just by getting the engine components matched and working together.

This engine was that good that one of the main national scruteneers for the comps we do had to have it for his competition motor. We took the rocker covers off after ?K miles and the oil was still golden and like new.

Rover V8 is my brothers thing much like guy that did your engine I suspect. The work that went into it was just no compromise. The engine caused a bit of havoc as once it was fitted to the trials vehicle that the scruteneer had I had people pestering me for his contact details when ever I went trialling. Nobody could buy this type of rebuild he would not do it for anyone. It was built with care and putting bits that work rarther than the usual (I got a TVR engine, well heads, and cam bollix) it was an awsome engine completly built for the 90 new. My bro trained with LR upto and including RR efi, Had his own buisiness for many years, trialed, raced and built offroad spaceframed specials for competition for many years in his workshop aswell as the usual service stuff. I helped after school and was brought up learning as you do usually getting diff oils and abused as you do in any workshop.

Engine building is about matching parts that perform well together. Bolting on bits especially to an older engine circa 100K depending on its previous use/abuse isn't always the best idea. At 100K It will probably need a camshaft anyhow and you may aswell rebuild it properly if your tearing it apart.

My bro is talking about doing an engine rebuild again soon making the V8 more viable affordable for everyday use aswell having all the performance and more by making it far more efficient. Watch this space. (maybe a little while tho but it will happen there is a list of motors to re chassis rebuild as new first)

I have a 3.9 in my 80 inch which no doubt will have been pulled out a RRC and messed with. Apparently has had a cam I just hope its not some stupid person fitting a race cam and I hope they havent replaced the lifters with some high spec ones cos it might end up a rocket ship with bugger all low down oomph.

ahhhhh.

i donated my +8 to ralph.he put it in the back of o metro ffs.

he made a sweet manifold real tight to the engine.ill txt him and see if i can get pics....

I saw a sweet Metro 4x4 with a V8 on a metro forum well neat and the exhaust manifold was well nice piece of artwork.

jai_landrover said:

I saw a sweet Metro 4x4 with a V8 on a metro forum well neat and the exhaust manifold was well nice piece of artwork.

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take it you see ralphs link.top metro eh....the guys a loon.

Any1 want to buy a 3.5 v8 exhaust system??

yes, whats it like?, PM me.

i also do, i think

you can have it noisy, I want manifolds with mine

It's single pipe for a carb motor

its hard to get the doubles for my carb motor, all the stainless one like double s and rimmer bros all have the single pipe like the later 3.9's FFS :doh:

Budget around £500, want tubular headers and all stainless with twin pipes, any ideas (for the 72 rrc btw)

You are dreaming if you want manifolds and full s/steel system for £500