Exhaust manifold
Discussion
Hi all.
I have just ordered a set of Clive Fs GT manifolds and Y piece. I have been thinking about removing the old manifolds and my thoughts as I don’t want to keep them is to cut through the pipes close to the mounting flange which will give me good access to the bolts to undo. Clive advised using the ACT ARP manifold bolt kit to fit the new manifolds which are meant to be easier to use. Thought on my plan please.
Rob.
I have just ordered a set of Clive Fs GT manifolds and Y piece. I have been thinking about removing the old manifolds and my thoughts as I don’t want to keep them is to cut through the pipes close to the mounting flange which will give me good access to the bolts to undo. Clive advised using the ACT ARP manifold bolt kit to fit the new manifolds which are meant to be easier to use. Thought on my plan please.
Rob.
Having done mine a number of times including having a couple of bolts snap in the head on the 1st attempt I'd start by soaking the bolts in a penetrating oil like plus gas.
They're do able and assuming your existing set are in ok condition you'll likely find someone who would buy them, there's a pair on ebay for eg without the Y piece for £500 for eg.
The advice re the smaller headed bolts is good however the standard nordlock washers ACT supplied me with the kit aren't rated to the temperatures they will endure and some of mine split and dropped off. I replaced them with the high temp variants but why pay for something that's wrong.
I think that the £500 on ebay is ambitious but I imagine they'd likely fetch enough to pay someone to do the job if you don't fancy it.
They're do able and assuming your existing set are in ok condition you'll likely find someone who would buy them, there's a pair on ebay for eg without the Y piece for £500 for eg.
The advice re the smaller headed bolts is good however the standard nordlock washers ACT supplied me with the kit aren't rated to the temperatures they will endure and some of mine split and dropped off. I replaced them with the high temp variants but why pay for something that's wrong.
I think that the £500 on ebay is ambitious but I imagine they'd likely fetch enough to pay someone to do the job if you don't fancy it.
You will still have to go from underneath to tighten the lower bolts on the new manifolds which requires the starter motor to be removed o/s and dropping the exhaust n/s to gain access so you might aswell remove the old manifolds properly.
Just soak the bolts and use your grinder to reduce the outside face of your spanner to make getting the bolts out easier or get a decent TVR man to do it for you and sell your manifolds to offset the cost.
The Catted y piece is worth £150 let alone the manifolds.
Many people who went de cat often go back to standard after their hearing suffers or the headaches after a long journey become tiresome
Just soak the bolts and use your grinder to reduce the outside face of your spanner to make getting the bolts out easier or get a decent TVR man to do it for you and sell your manifolds to offset the cost.
The Catted y piece is worth £150 let alone the manifolds.
Many people who went de cat often go back to standard after their hearing suffers or the headaches after a long journey become tiresome
Looks like skinned knuckles then. I will be replacing the exhaust with an ACT cherry bomb unit at the same time so the old exhaust will be off the car. I hope to have a new scissor lift in the garage before i tackle this so hopefully will be a bit easier. I will have to have a look at the old invoices later to see if any manifold gaskets have been replaced in the past. I’m lucky that the car came with all its history going back to when it was new. The new manifolds etc should be delivered in a couple of weeks time.
Rob
Rob
You'll be fine and as BritishTvr450 says modify a few spanners to help you with the job helps I bought some quality branded 2nd hand ones to slim down with the thought that they're probably stronger than budget ones. With the smaller bolts I was able to remove my near side completely from above.
ARP Exhaust Header Bolts - AZ325 they're available cheaper from other dealers. Check the part number yourself to be 100%
ARP Exhaust Header Bolts - AZ325 they're available cheaper from other dealers. Check the part number yourself to be 100%
Robbo D said:
Well a bit of good news. I thought I would try the bolts I could get to ok and all came undone nice and easy. Just hope the bottom bolts are just as easy.
Rob
That’s good. Rob
But….. you might be well advised to keep top bolts in at least until you have loosened the bottom bolts slightly as keeping the top bolts in and nipped up can remove some pressure on the bottom bolts especially the rear ones, they are the most difficult to do so getting them loose first is good practice. Good luck and take your time.
Expect each manifold to take 2-3 hours to remove and if you manage it quicker count it as a blessing. Remember the bolts might not have been removed for years.
Robbo D said:
BritishTvr450 said:
Robbo D said:
Well a bit of good news. I thought I would try the bolts I could get to ok and all came undone nice and easy. Just hope the bottom bolts are just as easy.
Rob
That s good. Rob
But .. you might be well advised to keep top bolts in at least until you have loosened the bottom bolts slightly as keeping the top bolts in and nipped up can remove some pressure on the bottom bolts especially the rear ones, they are the most difficult to do so getting them loose first is good practice. Good luck and take your time.
Expect each manifold to take 2-3 hours to remove and if you manage it quicker count it as a blessing. Remember the bolts might not have been removed for years.
Rob
Well that wasn’t the nicest job I have ever done on a car. Starter removal tip thanks. The worst bolt was on the NS manifold near the engine mount. Could only use an open ended spanner so rounding off the bolt was a real risk and it was tight but we got it in the end. Now to clean the chassis etc apply some paint and heat shield on the chassis near the exhaust. The manifolds and Y piece all look in very good order cats look very good. Just need to sell them now along with the std exhaust. New Cherry bomb is going back on.
Rob
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