Got the engine bay cleaned up a bit... Redid hood insulator (1 Viewer)

[Clint0511]

I think I got most of my oil leaks from above dealt with. Valve cover, distributor o-ring, pump seal and main.

After all that, my hood insulator was thrashed. Ordered 12mm heat shield, pulled old insulator down and traced as much as a template as I could. I then used foil tape to hem the edges. Only thing I should have done was added and extra inch to the perimeter to allow for the new insulator to conform to all the curves. A small screw with a nut was put in each of the clip holes so I could press it on to make my hole.

Overall pretty happy with the result. I guess looking forward to figuring out where my oil is going now. I think lower pan. I sprayed everything down, ran a sprinkler underneath for a bit to wash off some crud.

 

[Outsane]

Any quieter?

 

[inkpot]

Any quieter?

May be hard to tell. If you have biggie tires and/or noisy exhaust like me, it is moot. I lthrew mine away because it was starting to fall apart, and I don't really think I needed it to hold more heat in the engine bay,

 

[Clint0511]

Any quieter?

I didn't really notice much of a difference in sound.
I don't see how you can really quiet down that engine bay too much.

 

[Dr Gil]

I think I got most of my oil leaks from above dealt with. Valve cover, distributor o-ring, pump seal and main.

After all that, my hood insulator was thrashed. Ordered 12mm heat shield, pulled old insulator down and traced as much as a template as I could. I then used foil tape to hem the edges. Only thing I should have done was added and extra inch to the perimeter to allow for the new insulator to conform to all the curves. A small screw with a nut was put in each of the clip holes so I could press it on to make my hole.

Where did you buy your heat shield material from?

 

[Cruzerman]

I could totally be wrong, but I thought that the shield was more than just noise reduction. In a fire, it will fall down and help smother the fire. Again, could be pulling this out of my backside. Wouldn't be the first time.

 

[flyingmonkey]

Would this make your engine run hotter by keeping heat in the bay? My liner has seen better days but I figure if I do anything to the hood it will be to add vents. Not knocking your work as it looks really good just throwing out my line of thinking so I can get schooled.

 

[Clint0511]

Where did you buy your heat shield material from?

Amazon. It's an adhesive backed. I haven't pulled the backing yet, as I'm not sure I want that stuff stuff to the hood. It's sticky, and if I had to get rid of it, it would probably be easier to buy a new rig.

 

[Clint0511]

Amazon. It's an adhesive backed. I haven't pulled the backing yet, as I'm not sure I want that stuff stuff to the hood. It's sticky, and if I had to get rid of it, it would probably be easier to buy a new rig.

SOOMJ 10mm/394mil 78" x 39",Heat Shield,Car Sound Deadener Material Road Noise Dampener Sound Deadener & Heat Barrier Mat, Closed Cell Foam with Aluminum Sheet 1100(AA) https://www.amazon.com/dp/B073RLZPJ7/ref=cm_sw_r_cp_apa_q-PGBb7ZB6ZYC

 

[Clint0511]

I could totally be wrong, but I thought that the shield was more than just noise reduction. In a fire, it will fall down and help smother the fire. Again, could be pulling this out of my backside. Wouldn't be the first time.

I did look through a bunch of threads, and that is one of the proposed functions for the liner. Without actually seeing the engineers fmea, I am not sure. I do know I don't want to be the one putting my hand on the hood without something there after a couple hours of driving.

 

[Clint0511]

Would this make your engine run hotter by keeping heat in the bay? My liner has seen better days but I figure if I do anything to the hood it will be to add vents. Not knocking your work as it looks really good just throwing out my line of thinking so I can get schooled.

The oem liner also has a foil backing. It's just reversed (contacts the hood). The fiberglass matting faces the engine, which possibly helps extinguish an engine fire. This stuff would possibly do the same when the clips melt, which is why I didn't pull the adhesive backing.

Which makes me think I'm not trapping additional heat. I run a 190.4 per my obd2 Bluetooth. If that is now higher, I'll report back.

 

[COYS]

I replaced mine with new OEM including plastic clips that are brittle after 21 years of duty.

I’m always curious how so many of us that supposedly laud Toyota engineering on the 80, piece by piece, sub in backyard garage made in who knows where products and even begin to suggest it’s an improvement justified by some similar backyard garage r&d.

I conjecture that these are the types of things, including the arrogance or ignorance or both spurring them on, make OGs like beno lose his appetite.

YMMV I guess.

 

[Jcreme]

I could totally be wrong, but I thought that the shield was more than just noise reduction. In a fire, it will fall down and help smother the fire. Again, could be pulling this out of my backside. Wouldn't be the first time.

The purpose of hood insulation is, generally, to help the engine warm up faster (or maintain proper temp in super cold climates) to improve efficiency and improve emissions. The catalytic converters only do their thing once they are up to temp, for example.

For noise reduction, I don’t think this has a real impact. I’ve recently removed mine and didn’t notice it being any noisier.

If you live in an area that is cold for a significant amount of time of the year, I would keep/replace the insulation.

Uhh.. just to qualify my opinion: I’m a mechanical engineer specializing in internal combustion. BUT obviously I wasn’t on the original design team, so take it for what it’s worth....

 

[Clint0511]

I replaced mine with new OEM including plastic clips that are brittle after 21 years of duty.

I’m always curious how so many of us that supposedly laud Toyota engineering on the 80, piece by piece, sub in backyard garage made in who knows where products and even begin to suggest it’s an improvement justified by some similar backyard garage r&d.

I conjecture that these are the types of things, including the arrogance or ignorance or both spurring them on, make OGs like beno lose his appetite.

YMMV I guess.

Also a mechanical engineer here. I did attempt to source an oem hoodliner. Not available, or the cost is benefit didn't warrant it. Therefore, took a look at the construction, and made something reasonable. OEM makes sense sometimes. But an ABS clip? Your mileage may very, but I'll take the $200 in savings with my DIY solution, and put it towards something that matter... Like gas for a weekend road trip.

 

[Clint0511]

The purpose of hood insulation is, generally, to help the engine warm up faster (or maintain proper temp in super cold climates) to improve efficiency and improve emissions. The catalytic converters only do their thing once they are up to temp, for example.

For noise reduction, I don’t think this has a real impact. I’ve recently removed mine and didn’t notice it being any noisier.

If you live in an area that is cold for a significant amount of time of the year, I would keep/replace the insulation.

Uhh.. just to qualify my opinion: I’m a mechanical engineer specializing in internal combustion. BUT obviously I wasn’t on the original design team, so take it for what it’s worth....

Totally agree.

 

[COYS]

Also a mechanical engineer here. I did attempt to source an oem hoodliner. Not available, or the cost is benefit didn't warrant it. Therefore, took a look at the construction, and made something reasonable. OEM makes sense sometimes. But an ABS clip? Your mileage may very, but I'll take the $200 in savings with my DIY solution, and put it towards something that matter... Like gas for a weekend road trip.

Like I said ymmv - have a blast.

 

[BILT4ME]

I'm not an Engineer, but I stayed at a Holiday Inn last night.....

It also helps to keep from cooking the paint on the hood and making it discolor. The lighter colors of paint will start to discolor over time over 220°F. About 240°F, they start to turn brown.

 

[Jcreme]

I'm not an Engineer, but I stayed at a Holiday Inn last night.....

It also helps to keep from cooking the paint on the hood and making it discolor. The lighter colors of paint will start to discolor over time over 220°F. About 240°F, they start to turn brown.

Experience > schooling

 

[rolliges]

I did look through a bunch of threads, and that is one of the proposed functions for the liner. Without actually seeing the engineers fmea, I am not sure. I do know I don't want to be the one putting my hand on the hood without something there after a couple hours of driving.

If you still have the original; would you mind testing it over a small fire? Seriously.

 

[Tedward]

Crap, just tossed mine out Wednesday. Would have tossed in on a fire for giggles, I mean for science.