1/2 x 20 oil pan banjo bolt for gXi-F?

[GUnshipgator]

My oil pan rotted and I replaced it with an Aftermarket pan from basic power.com. Trouble is, the pan I bought is a 20 thread, where the original is a finer thread. I heard that prior to '96, Volvo used 1/2 x 20 bolts. Anyone else confirm this? I could use the solid bolt that. Ame with the pan, but then have no oil dipstick as the original dipstick tube runs external to the engine and to a small fitting that the original banjo bolt goes through. Any help to be had, or am I going to be stuck buying the Penta oil pan for 4 times the price?

 

[bruceb58]

Re: 1/2 x 20 oil pan banjo bolt for gXi-F?

You could have a welder cut out the old fitting on the original pan and replace the one on your new pan. Otherwise, you need to find the correct pan. Make sure you do a good paintjob on your new pan before you replace it. Make sure there are no nicks in the paint.

 

[Scott Danforth]

Re: 1/2 x 20 oil pan banjo bolt for gXi-F?

GM oil pan thread is 1/2-20.

Volvo got their oil pans ON engine from GM

 

[bruceb58]

Re: 1/2 x 20 oil pan banjo bolt for gXi-F?

GM oil pan thread is 1/2-20.

Volvo got their oil pans ON engine from GM

You sure about that? I know with OMC, the oil pans were special to accomodate the fittings for the dipstick tube and they varied from year to year. Also, the location of the drain hole is different than many of the automotive pans. After the OMC/Volvo joint venture, I believe this still exists.

 

[Scott Danforth]

Re: 1/2 x 20 oil pan banjo bolt for gXi-F?

I am 100% positive. same with engines that GM supplied to OMC. These are truck/industrial engines from the GM powertrain industrial engine division, not car engines. The specific marinization happenes by each marine engine supplier. The drain hole is generally on the bottom

However the OP purchased an Aftermarket oil pan. Not a factory GM oil pan.

 

[bruceb58]

Re: 1/2 x 20 oil pan banjo bolt for gXi-F?

The reason I stated this was that many years ago, I was doing the same thing as what the OP is doing, I could not locate the proper GM pan and I was going through GM dealers.

 

[Scott Danforth]

Re: 1/2 x 20 oil pan banjo bolt for gXi-F?

you can not go thru GM automotive dealers unless you have a part number. The automotive dealers can only look up what is on cars. you could go to a GM industrial engine dealer.

 

[bruceb58]

Re: 1/2 x 20 oil pan banjo bolt for gXi-F?

This was at a GMC truck dealership. Not the same?

 

[Scott Danforth]

Re: 1/2 x 20 oil pan banjo bolt for gXi-F?

no GMC truck dealership is an automobile dealer.

do a google search for GM industrial engine dealers, and you will get generator sales, irrigation pump sales, boat engines etc. unless the dealer also is an industrial or marine dealer, they do not have access to the IPL's (individual parts lists)

 

[GUnshipgator]

Re: 1/2 x 20 oil pan banjo bolt for gXi-F?

Well, if oil pans were provided on engine, then 2005 GXi-F wasn't a 1/2 x 20. The pan I got was that thread and then original banjo won't fit. Called the guy doing the work and told him about getting the original fitting cut and braised in and he's telling me that for that much work, i might as well buy the original. Don't know why it's so hard to get it off now except maybe that he undercoated the pan to save it further rot like the first one. I'm going to take the original pan and banjo bolt to a machine shop Monday to see if it wouldn't be easier to remanufacture the bolt with the correct thread. It's not a straight plug bolt though; cut grooves in it for the dipstick fitting and an O-ring groove will make this a pain to do.

 

[bruceb58]

Re: 1/2 x 20 oil pan banjo bolt for gXi-F?

When I replaced the pan on an older OMC(1988), they weren't 1/2 x 20 either and they changed them from year to year so I had to get all new fittings and a new dipstick when I changed my pan.

I take it Scott has replaced the pan on his later model Volvo or OMC V8 engine so he has personally experienced this mess?

 

[GUnshipgator]

Re: 1/2 x 20 oil pan banjo bolt for gXi-F?

OK, for the sake of clarification, the replacement (aftermarket) pan is 1/2 x 20 and the Penta banjo bolt that went to the Penta oil pan (original equipment) is 1/2 x 12 (estimated, counting threads per the 1/2 inch of threads on the bolt). At least in my case, Scott's info is off. It looks to be stainless, which makes sense. If only that same thought carried over to the WHOLE PAN! (Dear Volvo and ALL boat manufacturers; Stainless steel or aluminum oil pans are a requirement. Thank you for your cooperation). Now, if only I could get this thing machined to my threads or replicated. Seriously considering getting 10 of them made and selling them for $100/ea. Even at that price, I'd be $200 ahead of buying Volvo's oil pan.

 

[Scott Danforth]

Re: 1/2 x 20 oil pan banjo bolt for gXi-F?

that would be a M12 x 1.75 thread (metric). Just buy a banjo bolt for the 1/2-20 threads vs the M12x1.75 that you have.

 

[GUnshipgator]

Re: 1/2 x 20 oil pan banjo bolt for gXi-F?

Thanks for the clarification on the thread. Figures they'd put a metric thread on it. Looked into a couple colutions. First was buying a banjo bolt to fit, but couldn't find one readily available - It's not a standard banjo but has an o-ring and is machined down in the middle. Looked into a readily available oil drain kit that would fit the pan and then install a mercruiser-type oil dipstick though the fitting in the block on the starboard side. Of course, the plug in my block didn't want to come out and I didn't want to drill it and get shavings in the engine. Finally found another pan from Michigan Motorz that they guy assures me is the correct thread (he said he was familiar with the set-up and double checked and called me back quickly). They had two options; an aftermarket brand new or a GM original take-off (taken off a new zero hours engine). They were the same price, $95. So, I think all I've eaten is the 2 weeks delay in parts and the $89 for the first pan. If I can sell that for 1/2 what I paid for it maybe this will just be a $45 mistake. Two things I've taken from this are that Volvo's part number only system is purposely designed to stick it to the consumer AND if I had to do it over again, I would have changed my set-up to an oil drain and mercruiser dipstick set up long ago before the plug rusted in place. Hope this helps someone else and I'll reply back if there are further issues with the new pan.

 

[Scott Danforth]

Re: 1/2 x 20 oil pan banjo bolt for gXi-F?

Bruce58, I did not change the pan on my VP, it is stock with the 1/2-20 threads. I do however have experience with many marine engines from my last job as well as the industrial division since we used them for irrigation pumps and natural gas gen sets when I worked at Cummins.

 

[bruceb58]

Re: 1/2 x 20 oil pan banjo bolt for gXi-F?

Only problem with switching to the Mercruiser set up is that you can no longer suck the oil up through the dipstick with the garden hose attachment which I feel is worth the cost of getting the Volvo pan setup and having your dipstick set up stock.

Scott, you are telling him now that he has a 12 x 1.75 thread. He states that his thread is finer than a 1/2 x 20! Maybe my calculations are wrong but a 1.7mm pitch thread is more coarse than a 20 thread.

 

[Scott Danforth]

Re: 1/2 x 20 oil pan banjo bolt for gXi-F?

the two oil pan plugs that I know of for a GM SBC is the 1/2-20 and M12 x 1.75.

i do not know of anything finer than that. However if someone swapped over to a hydraulic banjo bolt, there is a M12 x 1, or a 7/16 x 24. I can not find any 1/2" commercially available banjo bolt with a thread finer than 1/2" could it simply be that the threads were cross-threaded and double chassed in the bolt?

A picture would help, as well a accurate measurement of the threads (caliper and thread gauge)

here is a source to buy banjo bolts

https://www.pegasusautoracing.com/group.asp?GroupID=BRAKEBANJOBOLT

http://www.godmanhiperformance.com/index.php?group_id=15&category_id=91

 

[bruceb58]

Re: 1/2 x 20 oil pan banjo bolt for gXi-F?

the two oil pan plugs that I know of for a GM SBC is the 1/2-20 and M12 x 1.75.

I agree! I know it doesn't make sense but I still think there is another pan that is put on these and its not the factory GM pan.