Josho

What size (thread & length) Bolts do I need to get to mount an 86' NA motor on my engine stand?

Thank you in advance,

Josh

Yabo

2.5-3 inches should be long enough. I just bought the bolts but I can't remember which sized they were. Bring in one of your bellhousing bolts and have them match it up. It's metric. Grade 5 or better should be ok.

Josho

I guess I should have thought of that, well it's been a long week . Thanks for the quick reply.

Yabo

If you are worried about length, get a 3.5 inch bolt and use a bunch of washers to shorten it.

theedge

The cross member bolts work in a pinch.

Those or the bell housing bolts.

Zero10

Yep, 2 of the bellhousing bolts are long enough for most engine stands, and take the others from the crossmember, since it always comes out when the engine is out (or it should). That or use all 4 from the crossmember.

jaje

I have to get some bolts for a used engine I will start rebuilding this winter (bought the engine but it did not come with bell housing or cross member bolts) so I need to get them from hardware or auto store but not sure what thread the engine takes

what i'm figuring is metric > 3.5" but coarse style (not thin)...what sized bolt...m6, m4?

tia

joseph mitro

no they are huge, more like M12 IIRC. the length depends on your engine stand bracket....mine had to be about 4" long. thread pitch is somewhat unique. i'll have to check the workshop manual when i get home.

jaje

so it is the higher the number the larger the bolt (always thought it was like guage of a wire the lower the wider)...it will probably need at least 3.5" as i've had several honda engines on there in the past but this will be the first porsche one

if you can check back that will help me a lot as just don't know which one. Thanks

nine-44

Take the lower bellhousing bolts to the store. I normally use 4 of them with some spacers on the stand, works fine for me.

Geo

I just went out and bought some. They are M12x1.5. I needed 80mm long for my stand. YMMV.

jaje

just found that out tonight as i went to home depot (they don't carry 1.5 pitch)...i went to advanced auto and they don't carry 1.5 pitch...where did you buy yours from?

Geo

I bought mine from a fastener supply near my shop. My local auto parts store usually has them but was out.

joseph mitro

yea, i had to buy mine from a specialized bolt shop (or fastener shop, to be technical )

jaje

well the porsche dealer has them of course...$8 for a bell housing bolt (~90mm), $6 for subframe bolt (~70mm), and $10 for a control arm bolt (~100mm)

found a bolt shop but they are of course closed on weekends - will get some next week.

thanks everyone