turboswede SuperDork
March 10, 2010 12:36 p.m.

Helping a co-worker change the headgasket on his 92 Protege DX (1.8L 16-valve SOHC) and we can't seem to find headbolts for it.

I've found tons of info on how to swap in a DOHC motor, but he just needs his commuter back as he's got a street bike and three rambunctious young boys to get his excitement.

So, since I'm new to the whole B-series Mazda motor thing, I'm wondering if the DOHC bolts are the same as the SOHC bolts?

Do you really need to replace the bolts or can they be used twice?


Keith SuperDork
March 10, 2010 12:37 p.m.

The DOHC ones can be used multiple times. Never worked on a SOHC, but I'd be amazed if they were different.

turboswede SuperDork
March 10, 2010 1:20 p.m.

Thanks, that helps. Since he has to take the head in to be checked, I'll have him look at prices and availability at NAPA.


Lesley SuperDork
March 10, 2010 4:13 p.m.

I just re-used the ones in my 323. Don't they have to be "stretch bolts" to be replaced? Whatever that means?

93celicaGT2 SuperDork
March 10, 2010 5:25 p.m.
Lesley wrote: I just re-used the ones in my 323. Don't they have to be "stretch bolts" to be replaced? Whatever that means?

Yeah, Torque-to-Yield bolts.

You'll need to log in to post.

Also on Grassroots Motorsports

First Drive: Turbo ND MX-5

1 day ago in News

We hit the track with Flyin' Miata's latest power adder.

This Weekend at the Mitty: The Ultimate Auto Festival

1 day ago in News

Gates open this Friday for the Classic Motorsports Mitty at Road Atlanta.

ND Miata Turbo Kits Now Available!

2 days ago in News

Add 70 horsepower and 70 ft.-lbs!

What's the Plan, Man?

3 days ago in Articles

Thoughts on our racing plan for the year.

Meet the Rebels Who Started the Cannonball Run

4 days ago in News

Relive those desperado days through movie excerpts, and hear the real facts and wild stories from the legends themselves.

Up for Auction: All of Level 5 Motorsports's Hardware

4 days ago in News

It's a pro race team part out.

Can You Really Live With a Low-Buck Porsche 911?

4 days ago in News

For the past two years, on of our forum regulars has been chronicling his life with a Porsche 996.

Project Turbo Miata: Fire Fighting

4 days ago in Project Cars

We transfer the fire system to our new Miata.

Reader's Ride of the Week: Autocross Abomination

6 days ago in News

Classic British styling with a rotary engine?


1 week ago in Articles

If you’re going to host the search for the ultimate street car, perhaps you should drive one yourself.

Chris Albin’s Flying VW Golf: What Really Happened?

1 week ago in News

What really happened to send Chris Albin's VW Golf flying?

Drive Cars From the Lane Motor Museum Collection

1 week ago in News

Love older, maybe slightly weirder cars? This event is for you.


Grassroots Motorsports Magazine

Subscribe Today

Also get your instant access to the digital edition of Grassroots Motorsports Magazine!

Learn More