More Griff advice
Discussion
Some will know I'm in the process of rebuilding a Griffith.
It currently looks like this
When I pulled the carpets out the exhaust has burnt through the footwell and been smouldering the underlay and carpet.
I'm going to fit Fatmat underlay under the new carpets but am after ideas on the damage and ways to prevent it happening again. These will ideally not involve taking the bloody engine out!!
It currently looks like this
When I pulled the carpets out the exhaust has burnt through the footwell and been smouldering the underlay and carpet.
I'm going to fit Fatmat underlay under the new carpets but am after ideas on the damage and ways to prevent it happening again. These will ideally not involve taking the bloody engine out!!
Inside the engine bay there should be some aluminium heatshield rivet to the side of the engine bay and transmission tunnel. I assume that yours is missing/damaged.
No idea if it is possible to replace that with the body in place but you might get better access doing a 2" lift of the body, that doesn't require the removal of the engine.
More tricky I suspect is going to be the repair of the fibreglass that is burnt/scorched. That will need cutting out and a new section glassing into place, tricky on a vertical section as it will need supporting while it cures and something to get the shape right
No idea if it is possible to replace that with the body in place but you might get better access doing a 2" lift of the body, that doesn't require the removal of the engine.
More tricky I suspect is going to be the repair of the fibreglass that is burnt/scorched. That will need cutting out and a new section glassing into place, tricky on a vertical section as it will need supporting while it cures and something to get the shape right
The heat shield is present and correct, it just hasn't worked very well
I've already started re-glassing the footwell, it's going to be patched across. Can't really see the point in going much further than that at this point, the area of fibreglass is much smaller than the area of damaged carpet.
Was wondering if I pulled the manifolds off, had them aluminium coated and then wrapped I'd bring temps down significantly?
I've already started re-glassing the footwell, it's going to be patched across. Can't really see the point in going much further than that at this point, the area of fibreglass is much smaller than the area of damaged carpet.
Was wondering if I pulled the manifolds off, had them aluminium coated and then wrapped I'd bring temps down significantly?
IMHO, it might indicate to me that either the pre-cat or the main cat is blocked and/or the fuelling is a bit amiss.
I had a Chimaera and never experienced this level of heat into the footwell to cause the carpets to scorch. My current TVR, a Tuscan, showed evidence of paint blistering on the main bonnet prior to a re-spray. Fairly common on the Tuscan with the 2 x cats on the pass. side and heat build-up in slow moving traffic. However, there is no sign of heat damage to pass. side carpets or to the grp tub....That seems to me to be a fairly intense heat source that your carpets have been exposed to?
Recall seeing 'photos of exhaust glowing red when there has been fuelling and catalyst problems on the RV8.
Nick
I had a Chimaera and never experienced this level of heat into the footwell to cause the carpets to scorch. My current TVR, a Tuscan, showed evidence of paint blistering on the main bonnet prior to a re-spray. Fairly common on the Tuscan with the 2 x cats on the pass. side and heat build-up in slow moving traffic. However, there is no sign of heat damage to pass. side carpets or to the grp tub....That seems to me to be a fairly intense heat source that your carpets have been exposed to?
Recall seeing 'photos of exhaust glowing red when there has been fuelling and catalyst problems on the RV8.
Nick
Heat damage to the footwell GRP was a known problem with the early pre-cat Griffs caused by the original exhaust manifold design, see here:
http://www.geocities.ws/pbtn6/exhaust.htm
There was a TVR designed fix, as mentioned above, to increase the air gap between the manifolds and the GRP engine bay wall. This involved reshaping the two areas so that the GRP recessed into the interior footwells.
http://www.geocities.ws/pbtn6/exhaust.htm
There was a TVR designed fix, as mentioned above, to increase the air gap between the manifolds and the GRP engine bay wall. This involved reshaping the two areas so that the GRP recessed into the interior footwells.
I've both reshaped the inner wing and used some sticky backed heat shield, both to very good effect.
I'll have a dig later to see if I can find the posts, because I remember writing all about it on here.
For now, I have logs to stack and garden tree lights to repair after hacking the wiring to bits with the hedge cutters
I'll have a dig later to see if I can find the posts, because I remember writing all about it on here.
For now, I have logs to stack and garden tree lights to repair after hacking the wiring to bits with the hedge cutters
Back again now the log store is full and the garden twinklies are twinkling again.
I'm ruddy glad to be sat down researching this for you though, my back is killing me!
Here is the story of my heat-shield burning issue
clicky
But before you go running off and checking your exhaust, have you done anything with your engine mounts recently?
My problem started, as you will see in the thread I've linked to, when I changed my manifolds, but if you haven't done anything with yours you need to understand what might have caused your problem, and the engine mounts are certainly your #1 suspect.
Have a read of this thread too
Clicky
I'm ruddy glad to be sat down researching this for you though, my back is killing me!
Here is the story of my heat-shield burning issue
clicky
But before you go running off and checking your exhaust, have you done anything with your engine mounts recently?
My problem started, as you will see in the thread I've linked to, when I changed my manifolds, but if you haven't done anything with yours you need to understand what might have caused your problem, and the engine mounts are certainly your #1 suspect.
Have a read of this thread too
Clicky
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