Bonnet Seal
Bonnet Seal
Author
Discussion

Alan Whitaker

Original Poster:

2,054 posts

203 months

Sunday 3rd September 2017
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What seal should there be between the body and the bonnet, also is this the seal that keeps water out of the engine area or is the water just run onto the top of the body area above the master cylinder

Alan

LawrieS

338 posts

137 months

Sunday 3rd September 2017
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Does this help?


GreenV8S

30,996 posts

305 months

Sunday 3rd September 2017
quotequote all
On my V8S that seal partially filled the gap rather than actually sealing anything. The panel in front of the windscreen is shaped to carry water to the edge of the engine bay where it will eventually either evaporate or drip to the ground. Before I added the bonnet vents I took that seal off to improve cooling while stationary, and never bothered to put it back. It didn't seem to me that it made much difference either way. There are a few variations in the bonnet fit and if yours comes close to the bodywork in the middle then the seal might protect the bonnet from damaging the tub, but I don't see any other particular need for it.

Alan Whitaker

Original Poster:

2,054 posts

203 months

Sunday 3rd September 2017
quotequote all
Just thinking where all the rain finish up after it runs down the screen, looks like it just runs into the engine bay

mentall

472 posts

151 months

Sunday 3rd September 2017
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In September 2015 I said:

"OK, let’s start a fight.
My S won’t be living outside until I’ve solved the problem, neglected by all those wonderful TVR engineers, of control of the rainwater which comes off the windscreen when parked, and off the back of the bonnet while travelling.
What they decided to do was to dump it all over the brake servo, the steering column UJ and the roadcrap that has already collected around the front outrigger, making totally sure that they live in a permanently moist environment.
Have any of you ever had any problems with these three components?
Look at any other post-war car. Look at a 1930’s MG Midget. Look, even, at the fairly adequate attempt that TVR made to protect your precious belongings in the boot from the rain. But not your precious belongings on the front of the firewall. Oh no.
Does anybody wonder why the UJ and servo live a long and happy life in the cars they were designed for, to the extent that we can use them for second-hand spares? Because they live in the warm and dry, that’s why.
No. my car will be a garage queen until I’ve found a way around that one."

It's still in the garage, mostly because I can't get it to run well enough for the MOT.
But the day will come..............
And when it does, I have a fiendish plan to fit a drainage channel across the bulkhead, which will not impede the airflow.

Alan Whitaker

Original Poster:

2,054 posts

203 months

Sunday 3rd September 2017
quotequote all
I was thinking just the same, all the water just runs onto all the bits you want to keep dry, I look forward to seeing your drain idea.

GreenV8S

30,996 posts

305 months

Sunday 3rd September 2017
quotequote all
The only moisture that my brake servo sees comes from spray thrown up by the wheels. This is unavoidable and means the bottom of the servo is going to rust out eventually regardless of where you drain the rain water.

I've seen the rear wheel arch liner extended to protect the front edge of the outrigger tube from stone chips and that seems like a good idea, but it's directly behind the spray from the front wheel so nothing you do is going to keep that dry.

You can dramatically extend the life of the upper steering column UK by putting a boot over it to protect from it exhaust heat and dirt. A generic steering rack end gaiter does the job nicely.

phillpot

17,436 posts

204 months

Monday 4th September 2017
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Personally I'd be very wary of home made improvised gaiters on the steering uj, unless you get it 100% sealed water and muck will get in and be held there...... promoting corrosion rather than reducing it.
Unprotected but kept clean mine is still good after 7 years, I'm happy with that smile

GreenV8S

30,996 posts

305 months

Monday 4th September 2017
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It's not a problem - the suggested gaiters have one end that is a tight fit on the upper column, and one end that goes over the joint and needs to be pulled down over the lower column with a zip tie. It has proved much more reliable than the original unprotected joint.

Alan Whitaker

Original Poster:

2,054 posts

203 months

Tuesday 5th September 2017
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Hi All
This is the area I want to keep the water out, it just runs down into anything you put on here, going to mount the ECU's there and the ECU fuse box as well. Going to mount the main fuse box on the other side as well


phillpot

17,436 posts

204 months

Tuesday 5th September 2017
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Not a good place in my humble opinion for lots of electrics. How about in the voids between the wing and the footwell behind the side repeaters?

Alan Whitaker

Original Poster:

2,054 posts

203 months

Tuesday 5th September 2017
quotequote all
True but still not a great idea to have all the water pun down into the brake servo and down onto the steering bush and then into the front out riggers, there must be a way to reduce or stop water from running in. Have a idea but will have to wait a few weeks the sun is calling

phillpot

17,436 posts

204 months

Tuesday 5th September 2017
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True but whatever runs down is nothing compared to what gets thrown up by the wheels or generally spread around by airflow scratchchin

GreenV8S

30,996 posts

305 months

Wednesday 6th September 2017
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If it's under the bonnet, it's going to get wet at some point. Your fuse panels and ECU etc will need to be weather proof in any case.

Alan Whitaker

Original Poster:

2,054 posts

203 months

Wednesday 6th September 2017
quotequote all
I will be hard to keep water from the wheels so I have these, they go right down and are about 1" below the out riggers, Just need to sort out some brackets so I can remove them with ease.