The Top DSM Community on the Web

For 1990-1999 Mitsubishi Eclipse, Eagle Talon, Plymouth Laser, and Galant VR-4 Owners. Log in to remove most ads.

Please Support ExtremePSI
Please Support Fuel Injector Clinic

1G Need help determining bolts for oil pump!

This site may earn a commission from merchant
affiliate links, including eBay, Amazon, and others.

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

madcows

Probationary Member
20
0
Nov 19, 2012
Sterling Height, Michigan
Hello,

I'm making [very] slow progress getting this build done. It has been a long time since I tore it all apart and also had to move everything from one house to another in a haste. Compounding that, the car was previously someone else's questionable project, so I wouldn't be surprised if I didn't have the correct bolts in the first place! Therefore, I'm hoping to get some numbers so I can run to a hardware store with a good selection of bolts to hopefully pick up what I need. Any help would be appreciated!

I've seen the diagrams and found a fairly helpful thread here: http://www.dsmtuners.com/threads/how-many-bolts-for-oil-pump.482725/ but I still have a few questions:

1) There are a bunch of different bolt sizes according to the factory diagram, which seems (correct me if I'm wrong), a bit unnecessary. The bottom image in the link cited above lists the majority of the bolts as "12mm short", so is this a "one length fits all" in those spots? The shortest length in the official diagram shows 20mm, so should I go with that in those spots or should I go with something bigger?

2) I can find no mention about the bolt lengths used for the oil pump gear cover on back of the oil pump housing. I found some that fit (but still not enough), though they seem quite long compared to the ones I saw in some youtube videos discussing the pump, but it's hard to compare. Any suggestions on the length I could use there?

Thanks!
 
Here's a pic that might help. It's all the bolts new from jnz, so you can see which you need. That's for a 6bolt not sure what you have exactly?
 

Attachments

  • image.jpg
    image.jpg
    37.9 KB · Views: 305
Thanks, Dsmkauai. I do indeed have a 6 bolt. It appears that kit contains 5 different sized bolts :-/

@1990dsmkid
I've looked at WSRD's offering. Had a difficult time finding others (I'll check out jnz). My main problem is that they don't seem to offer all the bolts I need, so I would still have to pick up the missing ones from a hardware store anyway. Might as well just buy them all that way.
 
@tmoney20g
That's the diagram I was basing it off of and I guess the 25mm bolt would be the only one to potentially change to a 20mm, but I probably shouldn't do that since that's the spot with the dowel pin so the threads are recessed.

Thanks, 1990dsmkid. Again, the problem with these kits is that they contain none of the bolts for the rear pump cover, nor the bolts for the oil filter housing so I still have to go to the hardware store.


That brings me back to the rear cover. Is it ok to use 20mm bolts there?
 
@Dsmkauai
I must be blind because I see neither the bolts for the inside oil pump cover, nor the oil filter housing bolts. :-/
 
Last edited:
Ah, cool. Thanks 1990dsmkid.

@Dsmkauai
As far as I can tell, those bolts are only for the cover to mount them to the block. I also need the bolts for this:
You must be logged in to view this image or video.
 
I just did my front case last weekend, and I dunno if I screwed something up or whoever packaged the JNZ front case kit for me forgot one, but that L=25mm bolt wasn't in the bag, which was vacuum sealed. I was lucky enough to bag all my bolts when I took it apart, so I just used my old one there.

So you can see that the one in question, and the one I used to cover up the pulley from the BSE, are the only one's I re-used. I did have a new one leftover, but I guess that one went where the pulley used to be:

You must be logged in to view this image or video.


I'm going with the FFOFH, as you can see, and I ordered the set of 4 bolts for those 4 holes (which are different than the water-cooled 91-92 lengths).

Edit, and when I ordered my new tensioner, I ordered 2 new bolts for that too. (they're not included in the front case set).

So you'll want the 8-bolt kit:
http://www.jnztuning.com/product_info.php?products_id=3250

You'll want the tensioner bolts:
2 x MD129350

Oil filter housing:
For 1990:
MF241266 (washer assembled 8x65)
MF241261 (washer assembled 8x40)
MF241268 (washer assembled 8x75)
MF241264 (washer assembled 8x55)

For 91-92:
MF241261 (washer assembled 8x40) x 2
MF241268 (washer assembled 8x75)
MF241264 (washer assembled 8x55)

Hope I read that correctly from the diagrams in ASA. But if you call josh @ jnz and know what you want, he'll get you sorted out.
 
Last edited:
Thanks for the thorough reply and part numbers, tmoney20g. Scrounging through the bucket (fml) of bolts I have, I ended up finding most of the ones I needed. Since I wanted to use the original 20mm bolts for the housing to block, I bought some hardware store stainless bolts for the rear pump cover. Since the required torque for those is pretty low, and stainless is fairly compatible with aluminum, I figured I would be okay.

I also couldn't find the 75 and 55mm bolts for the oil filter housing. I managed to find a 75mm from the HW store (again, stainless) but not washer assembled. I actually couldn't find a 55, so I bought a 60 with the intention of cutting it down. I'm less than thrilled about this, and since it looks like I'm missing some other bits of hardware, I might as well pick up the oil filter housing bolts while I'm at it.

I had both tensioner bolts still sitting through the tensioner, or at least I could have sworn I did the other day. Now I can only find one. :banghead:

btw, your build is looking nice. I don't think anything will be leaking out of that balance shaft cover any time soon.


edit: Looking at extreme psi's oil filter housing bolt kit, they mention it being for 90-94, and judging by the pic, the two long bolts are the same size, which doesn't seem right.
 
Last edited:
Yea, I'm gonna go back and check 2 of the bolts, which I'm pissed off about. I'm just second guessing myself now that you made this thread (so thank you, sorta ? :banghead:).

When I put the cover on, it was obvious where the 3 same size one's went at the upper left. And it was obvious where the m10 bolt went. The rest I kinda guessed and I'm stupid and should have referenced the stuff we found for this thread or my haynes manual. Lol, and they're all red-loctited. But better safe than sorry, and at least I'll know I have the right ones in there. What's 10-20 more minutes of work anyway... just to know it's the way its' supposed to be.

I don't doubt 91-94 are the same, since they're all water-cooled regardless of 6/7 bolt. I was just going by ASA. This is weird, just brought up ASA again to look, and the page with the air-cooled housing says pre-9206.1 (4 different bolts). Page 2 is 9207.1- (1+1+2 bolts).
 
@tmoney20g

You would think that there's a reason for all the different bolt sizes, so the longer bolts would be noticeable if you put them in the wrong spot. But yeah, maybe the safest route is to recheck them. I hate doing work twice, but at least all the bolts are right there.

>I don't doubt 91-94 are the same, since they're all water-cooled regardless of 6/7 bolt. I was just going by >ASA. This is weird, just brought up ASA again to look, and the page with the air-cooled housing says pre->9206.1 (4 different bolts). Page 2 is 9207.1- (1+1+2 bolts).

Ugh. This is the kind of crap I hate. I definitely have the air-cooled housing (but I really don't remember having an air to oil cooler.. heh. Should go take a peek). Stupid Haynes book (yeah, I got one too) is almost totally useless. I already caught the wrong main bearings torque specs before it became a problem :ohdamn:. Btw, what's ASA? :coy:
 
ASA is the newer version of Mitsu CAPS program. I have CAPS on an xp machine and ASA on my win7 machine.

....aaaaand i'm pretty sure air cooled was only on 90s, or am i stupid ?
 
Thanks, drewbuddy. I actually came across that list earlier but some of the bolts I was interested in were not listed.[DOUBLEPOST=1416945021][/DOUBLEPOST]>ASA is the newer version of Mitsu CAPS program. I have CAPS on an xp machine and ASA on my win7 machine.

Oh, sweet. I didn't know about this until just know. Nice that it's freely available online. Thanks for the heads up!


>....aaaaand i'm pretty sure air cooled was only on 90s, or am i stupid ?
I'm pretty sure you're right. Mine is a 90, but I have so many various spare parts from the previous owner, it takes a little bit more effort to determine what is original and what is from a newer car. That's what I get for buying someone else's project.
 
Last edited:
Thanks, drewbuddy. I actually came across that list earlier but some of the bolts I was interested in were not listed.

You sure about that? Mind sharing which ones those might be so they can be added?

Oil Filter Housing (all non-turbo and 6-bolt turbo)
2x, top two bolts (washer assembled)
M8 x 1.25 40
1x, bottom left bolt (washer assembled)
M8 x 1.25 75
1x, bottom right bolt (washer assembled)
M8 x 1.25 55

Oil Filter Housing (Turbo 7-bolt)
2x, top left bolt and bottom right bolt (washer assembled)
M8 x 1.25 65
1x, top right bolt (washer assembled)
M8 x 1.25 40
1x, bottom left bolt (washer assembled)
M8 x 1.25 75

Front Case (Oil Pump) to Block (6-bolt)
4x, three around front balance shaft, other is on top and to the far right (flange)
M8 x 1.25 20
1x, down and to the left of largest (flange)
M8 x 1.25 40
1x, largest (flange)
M10 x 1.25 30
1x, on bottom and to the far right (flange)
M8 x 1.25 25

Front Case (Oil Pump) to Block (7-bolt)
- The below do not include OFH, hydraulic tensioner, or balance shaft bolts​
3x, two around front balance shaft, other down and to the right of right-most
hydraulic tensioner bolt
M8 x 1.25 20
1x, down and to the left of right-most hydraulic tensioner bolt
M8 x 1.25 20or22
1x, second bolt along top from right side
M8 x 1.25 40
1x, first bolt along top from right side
M8 x 1.25 25
1x, on bottom and to the far right
M8 x 1.25 32

Oil Pump Inner Casing Bolt (flange)
M8 x 1.25 20

1) There are a bunch of different bolt sizes according to the factory diagram, which seems (correct me if I'm wrong), a bit unnecessary. The bottom image in the link cited above lists the majority of the bolts as "12mm short", so is this a "one length fits all" in those spots? The shortest length in the official diagram shows 20mm, so should I go with that in those spots or should I go with something bigger?

2) I can find no mention about the bolt lengths used for the oil pump gear cover on back of the oil pump housing. I found some that fit (but still not enough), though they seem quite long compared to the ones I saw in some youtube videos discussing the pump, but it's hard to compare. Any suggestions on the length I could use there?

Thanks!

1) Did you read the rest of that thread, particularly the post that I pointed out that diagram you are referencing is nothing but the size of the bolt head?
2) See "Oil Pump Inner Casing" above; they are all the same, hence only the one size listed in the 1G bolt thread provided for you.
 
@19Eclipse90

I understood that the imagine indicated the size of the bolt head, but called three different bolt sizes "short". My question was regarding whether or not the same size bolt could safely be used in all those spots. Sort of irrelevant now (except perhaps to others in the future) as I found all of those.

I totally missed the "Oil Pump Inner Casing" listing! Thanks a lot for pointing it out! I'm glad that I actually bought 20mm long bolts (but 13mm heads, yeah yeah, I know, I let the Japanese down).[DOUBLEPOST=1417048260][/DOUBLEPOST]I actually feel a bit better after learning grade 10.9 metric bolts are the equivalent to grade 8. They're stainless rather than zinc, though, so I don't know if they're better or worse in terms of corrosion resistance and material compatibility.
 
Last edited:
Support Vendors who Support the DSM Community
Boosted Fabrication ECM Tuning ExtremePSI Fuel Injector Clinic Innovation Products Jacks Transmissions JNZ Tuning Kiggly Racing Morrison Fabrications MyMitsubishiStore.com RixRacing RockAuto RTM Racing STM Tuned

Latest posts

Build Thread Updates

Vendor Updates

Latest Classifieds

Back
Top