valve spring lenghts

Engines, Transmissions & Final Drive questions and answers

Moderators: timk, Stu, zombie, Andrew, The American, Lokiel, -alex, miata, StanTheMan, greenMachine, ManiacLachy, Daffy

ralt
Fast Driver
Posts: 423
Joined: Thu May 19, 2011 11:10 am
Vehicle: ND - 2
Location: brisbane

valve spring lenghts

Postby ralt » Wed May 08, 2013 7:12 pm

Hi.
Would anybody know if there is a difference in the free lengths of valve springs in the 1.6 and 1.8 engines please. The lengths if known would help me.

manga_blue
Forum Guru
Posts: 4897
Joined: Mon Apr 24, 2006 7:27 pm
Vehicle: NA8
Location: Moruya, NSW

Re: valve spring lenghts

Postby manga_blue » Wed May 08, 2013 7:24 pm

NA8:
free length IN and EX 46.26mm,
min length 39.5mm under a fixed load of 22.8 to 25.8 Kgf

NA6:
free length IN 48.0 mm / EX 48.3 mm EX,
min length IN 40.0 mm at 22.1 to 25.1 Kgf / EX 40.0 at 17.7 to 20.0 Kgf

So slightly different. Call Performance Springs in Qld if you want replacements: best and cheapest.
’95 NA8

ralt
Fast Driver
Posts: 423
Joined: Thu May 19, 2011 11:10 am
Vehicle: ND - 2
Location: brisbane

Re: valve spring lenghts

Postby ralt » Fri May 10, 2013 11:13 am

Hi.
Thank you manga blue for the information

manga_blue
Forum Guru
Posts: 4897
Joined: Mon Apr 24, 2006 7:27 pm
Vehicle: NA8
Location: Moruya, NSW

Re: valve spring lenghts

Postby manga_blue » Fri May 10, 2013 11:37 am

No problem. FWIW I had 2 sets of NA8 springs, both with about 170,000kms on them. 2 springs out of 32 passed the loaded length test.
’95 NA8


Return to “MX5 Engines, Transmission & Final Drive”

Who is online

Users browsing this forum: No registered users and 109 guests