Powder coated valve covers and intake manifold for the 164 V6 Turbo

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itsoman
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Joined: Wed Jun 10, 2020 9:48 am

Powder coated valve covers and intake manifold for the 164 V6 Turbo

Post by itsoman »

Hello fellow 164 owners. I just could not go on without sharing my newly painted valve covers.

So my valve covers were looking quite old and oily. Really dirty, the intake runners were rusty and the whole engine looked quite tired because of that. So I couldn't take it anymore and decided to do something about it. So there I was disassembling the 164 on the street parking to where I live. Took apart quite a few things and took home the two valve covers, the intake manifold and the intake runners. I've cleaned the valve covers as good as I can and went on the internet to search for a sandblasting company which will bring back the beautiful look of the engine. I've found a local company that offer sandblasting and powdercoating. I've went there with the parts, the guys took a look at the parts and sent me away to find a steam pressure washer to clean the backside of the covers. As it turns out there were 30 years of oil sludge on the back side of the valve covers. So this had to be taken care of since the sand would mix with the grease like stuff and will be hard to clean. So having these cleaned (or at least I thought I had cleaned them) I went back and the guys took the parts and told me that they would call me when it's done. So the end result looks like that:
IMG_20211022_230135.jpg
IMG_20211022_230152.jpg
IMG_20211106_210305.jpg

I decided to go a bit untraditional and paint the text black instead of my first thought, red.

Also I've used a brass wire brush to clean the intake runners from the rust. They turned out quite good. And while I was tearing down everything I had some time to inspect the some of the bolts that were there. It turned out that the car did have hard or at least messy life. Most of the hex bolts were overtight and the inner hex was ruined on quite a few. Along with being rusty. So a trip to the general store was made for some new stainless steel bolts. I have replaced the bolts which were holding the intake runners. The bolts on the valve covers were a rare size. M7 x 25mm length. Turns out this is not something I can just buy since no one is using these bolts around here. I had to get radical. I've ordered some M8x30 stainless bolts and these are being turned to M7x25 via a machine shop. Once I have these ready I'll share some more photos of them.
1992 Alfa 164 V6 Turbo
1999 Alfa 166 V6 TB
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itsoman
Posts: 11
Joined: Wed Jun 10, 2020 9:48 am

Re: Powder coated valve covers and intake manifold for the 164 V6 Turbo

Post by itsoman »

And here is the the 164 being tucked away for the winter next to my 166 V6 TB
IMG_20211107_141753.jpg
1992 Alfa 164 V6 Turbo
1999 Alfa 166 V6 TB
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Alfan
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Re: Powder coated valve covers and intake manifold for the 164 V6 Turbo

Post by Alfan »

They make a very nice pair 😎

You got a good result for the valve covers 👍

Yes, that bolt size is not easy to find, I used ebay to track some down.
1994 Alfa Romeo 164 Q4 Proteo R
1989 Lancia Thema 8.32 Verde Indy
2001 Alfa Romeo Spider 3.0 24V Blue Lightning
2015 Alfa Romeo 4C Rosso Comp
2021 Alfa Romeo Giulia Sprint Anodized Blu
1980 Alfa Romeo Alfetta Blindata Bianco
2003 Alfa Romeo 166 3.2 Grigio
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itsoman
Posts: 11
Joined: Wed Jun 10, 2020 9:48 am

Re: Powder coated valve covers and intake manifold for the 164 V6 Turbo

Post by itsoman »

Thanks, I do love both of them equally as each has its own perks and feel when driving.

And just recently(4 days ago) I have acquired another 166 V6 Turbo for parts. It came with a spare engine. So I could now try to achieve my ultimate fantasy with the 2.0 V6. I've been thinking of going 100mm sleeves and 3.0 24v heads. The end result should be 3.1 V6 24v with extremely short stroke that it rev happy. Coupled that with a turbo it should be a beast.

However I'm not sure if the 2.0 V6 block could accept 100mm liners. I'll have to consult with the machine shop which will be performing the work. But first I'll get a sample 100mm sleeve and send the engine block and sleeve to the machine shop for some measurements.
1992 Alfa 164 V6 Turbo
1999 Alfa 166 V6 TB
User avatar
Alfan
Q4 owner
Posts: 1305
Joined: Thu Oct 22, 2009 8:20 pm
Location: Denmark
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Re: Powder coated valve covers and intake manifold for the 164 V6 Turbo

Post by Alfan »

That would be an interesting experiment. Please update with what you decide to do 👍
1994 Alfa Romeo 164 Q4 Proteo R
1989 Lancia Thema 8.32 Verde Indy
2001 Alfa Romeo Spider 3.0 24V Blue Lightning
2015 Alfa Romeo 4C Rosso Comp
2021 Alfa Romeo Giulia Sprint Anodized Blu
1980 Alfa Romeo Alfetta Blindata Bianco
2003 Alfa Romeo 166 3.2 Grigio
User avatar
itsoman
Posts: 11
Joined: Wed Jun 10, 2020 9:48 am

Re: Powder coated valve covers and intake manifold for the 164 V6 Turbo

Post by itsoman »

Thanks Alfan,

Actually I've managed to get some parts which should help with this idea of mine. Since it is still in its early stages I believe a new thread won't be necessary but once I have some progress (once the machine shop confirms that the block can be sleeved with 100mm sleeves) I'll start a new one. So I have obtained the following so far:
  • Lancia Thesis 3.0 V6 24v heads - The Thesis uses the Alfa V6 in 3.0 and 3.2 guise and I got these extremely cheap around 13EUR per head
  • Piston with a rod from a Subaru EJ254 - This is the 2.5 liter flat 4 Subaru Engine. Piston diameter is 99.5 and there are 100mm pistons as well. Also as it turned out from my internet research the rods are quite similar in dimensions and by similar I mean the piston pin is 23 vs 22, big end diameter appears to be basically the same and rod length has a 0.5mm difference. Unfortunately the width of the big end is less compared to the Alfa one.
  • A piston rod from an Alfa 2.5 V6 24v - I've been reading through the internet that the rods for 2.5 and 3.0 are the same. However I'm not sure about the length of the 2.0 V6
I still have to get a sample sleeve which to be tested if it will fit. I've stopped my attention on an old Russian truck. The engine in this truck has a 100mm pistons and the block is sleeved. Engine block and heads are cast iron. Everything is made to last a lifetime and since we have these trucks around here quite a lot it's not an issue to source a new sleeve for next to nothing. Actually I saw this idea from another forum where one of the users converted his 166 3.2 to 3.7 using the same sleeve with a few modifications to it of course.

A few pictures of the aforementioned parts:

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Image

Image

Image

The last picture i have downloaded from the internet since I don't have a sleeve at the moment but will obtain one soon. Next steps would be to take the engine apart and get the bare block with the sample sleeve to the machine shop for the diagnosis of whether it can take it or not. I've been reading that the 2.5 will be able to accept 100mm sleeves and with talks that the 2.0 V6 is based on the 3.0 I have hopes that it could be done.
1992 Alfa 164 V6 Turbo
1999 Alfa 166 V6 TB
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