HP manifolds finally installed

[GBsPanhead]

What a day! Had bought some HP manifolds last year, hoping I did my research properly, and got all the right parts.

Been putting it off for months. Scared of horror stories of studs breaking off etc. Sprayed the nuts down last night with WD40. I don't think it was necessary in my case. 50 years of oily grime kept the nuts from rusting and locking on to the studs lol. Each nut took a strong, quick jerk on the socket wrench, but once loose, spun off with just fingers. No gaskets between head and manifold. Hope these new ones don't leak. Old manifolds didn't leak.

The pics here are just mocked up to make sure all went back together OK...it did. Not sure I want to pull manifolds off and paint or leave as is. Either way, manifolds coming back off so I can clean best I can on sides of block etc.

Pulled a spark plug from each head to aid in pulling manifolds out. Plug color looks pretty good to me.

Once all installed, will take to my exhaust guy to have him weld up a new section for the manifolds's different exit angle. Waiting for new valve cover gaskets and hardware so I can finish that swap too.

 

[GBsPanhead]

OK, I don't know why my pic of my Aprilia won' delete. I went to edit, removed it so I thought, but still shows up. Hmmmm. Took her out to the canyons this morning before working on the 300.

 

[Davea Lux]

Do not paint the manifolds. Most of the stuff they paint on burns off unevenly and the remainder is a PIA to get rid of. Mild patina is a sign of normal and expected use.

Dave

 

[GOLDMYN]

Very nice job, how far do you have to drive? I'm thinking a tad loud for the freeway in La...

 

[GBsPanhead]

I agree! Wouldn't go with my new/used OEM valve covers I just installed, if I were to paint them.

I would drive the 300 to the welder. Its a few miles, but worried about cooking a valve. I may flatbed to shop, or use some of those flexible exhaust joints temporaily to get me t0 the shop, or buy a HF cheap welder and try it myself.

 

[65sporty]

You should be fine driving to the exhaust shop. I have driven a few with open manifolds without issues.

 

[1978 NYB]

Manifolds look great!

 

[67440NewYorker]

Looks great! And i drove mine to the exhaust shop when i did mine with absolutely no issues! I wouldnt hesitate to do it again to save on a tow bill.

 

[GBsPanhead]

Well, finalized install. Left the manifolds in natural/unpainted state.

I found a torque spec for nuts that hold manifolds to the head....30ft pounds. That sound about right? That's were I torqued them to. Just want to double check. Thanks!

 

[Davea Lux]

Well, finalized install. Left the manifolds in natural/unpainted state.

I found a torque spec for nuts that hold manifolds to the head....30ft pounds. That sound about right? That's were I torqued them to. Just want to double check. Thanks!

30 ft/lbs is correct.

Dave

 

[GBsPanhead]

Thanks Dave!!

 

[bajajoaquin]

Nice ‘priller

 

[GBsPanhead]

Got my valve cover hardware today. Bolted it all together. Fired her up. No way can I drive this to my muffler guy. Loud as hell with just the manifolds open, not connected to anything. Hmmmm lol.

 

[Fratzog]

Looking good. To keep the HP manifolds on the Monaco from rusting and a natural patina I give them a thin coat of anti seize compound annually. Don't get carried away otherwise they will look too shiny.

 

[GBsPanhead]

Looking good. To keep the HP manifolds on the Monaco from rusting and a natural patina I give them a thin coat of anti seize compound annually. Don't get carried away otherwise they will look too shiny.

Anti seize...hell I gotta huge jar of that somewhere. Have to find it and try it. Thanks!

 

[Turboomni]

Never heard of that using anti seize on cast iron manifolds. But they should be rust free to begin with I assume?

 

[thrashingcows]

Do not paint the manifolds. Most of the stuff they paint on burns off unevenly and the remainder is a PIA to get rid of. Mild patina is a sign of normal and expected use.

Dave

If you use the Eastwood manifold paint they will last many years...BUT you have to prep them properly. They need to be blasted clean, wiped with acetone/laquer thinner and then install the manifold paint, let it dry a day or two then once installed make sure the vehicle is outside and let the motor run for 15-30 min to cure the coating.

I have been using this product for many years on my vehicles and it holds up well, but might need a little sanding on portions each year and a fresh area touched up to keep them looking good. Worse if the vehicle is parked outside, but if stored inside and driven in good weather the coating will last many years.

 

[1978 NYB]

If you use the Eastwood manifold paint they will last many years...BUT you have to prep them properly. They need to be blasted clean, wiped with acetone/laquer thinner and then install the manifold paint, let it dry a day or two then once installed make sure the vehicle is outside and let the motor run for 15-30 min to cure the coating.

I have been using this product for many years on my vehicles and it holds up well, but might need a little sanding on portions each year and a fresh area touched up to keep them looking good. Worse if the vehicle is parked outside, but if stored inside and driven in good weather the coating will last many years.

Picture?

 

[Turboomni]

Looking good. To keep the HP manifolds on the Monaco from rusting and a natural patina I give them a thin coat of anti seize compound annually. Don't get carried away otherwise they will look too shiny.

Got a pic?

 

[thrashingcows]

Picture?

These are the manifolds on the wagon....not properly prepped other then a rough sanding about 8 years ago, and many months parked outside and driven in the winter for a few months......Still holding up not bad.

Only pics I have of the manifolds right now.