The Ford Barn

37coop · 07-13-2016, 03:29 AM

Hi guys. I,v started the engine on my just restored 39 coupe for the first time in 28 years,fired up quickly ,sounds sweet and throttle responds well,very pleased.....but the oil pressure gauge goes straight round the clock and stays there even on fast tick over ,it has been converted to 12 volt neg earth and fitted with a 6to12 voltage reducer,the oil pan was off and all cleaned out years ago,it has the oil pressure gauge and pump and dial from when I bought it, possibly the original. Any ideas ? It's booked into its first show in August .many thanks. Jim.

Brian · 07-13-2016, 03:41 AM

Firstly, verify with a mechanical gauge what the oil pressure really is. If the original gauge goes off the clock, does it do it as soon as ignition is turned on, ie, before you fire the engine? If so, could be a short in the sender or wire is shorted.

JSeery · 07-13-2016, 07:27 AM

I agree, you have no idea what is going on until you have a known good oil pressure gauge.

37coop · 07-13-2016, 12:54 PM

Thanks for your advice ,the pressure rises when engine runs ,yup I guess the way forward is as you said use a mechanical gauge ,I haven't got one and being here in the U.K might be difficult getting one with American fittings but will get enquiring ,thanks again. Jim.

G.M. · 07-13-2016, 02:15 PM

Quote:

Originally Posted by 37coop

Thanks for your advice ,the pressure rises when engine runs ,yup I guess the way forward is as you said use a mechanical gauge ,I haven't got one and being here in the U.K might be difficult getting one with American fittings but will get enquiring ,thanks again. Jim.

The threads for the gauge are 1/4" pipe. G.M.

JSeery · 07-13-2016, 02:24 PM

Sponsored Links (Register now to hide all advertisements)

If you can order for the US most of the gauge kits come with a large selection of adaptors. Might check out Speedway, Jegs, Simmit, etc.

TomT/Williamsburg · 07-13-2016, 04:39 PM

Check in with Steve Lang - his handle is Langy on the HAMB. He is a dealer in the UK for mostly hot rod stuff but may be or have a source for you ....

Mart · 07-13-2016, 04:45 PM

Julian at Pop parts plus has the three gauge clusters. I bought a set from a mini spares place up north on ebay. The gauges come with the correct adaptors for the flathead motor. I just checked on ebay and couldn't see any, but google pop parts plus - they're listing some, and Julian had loads on display at the nostalgia nationals. Beware that NPT (American) pipe threads are not the same as BSP. (I guess you already know that). Search Sunpro on ebay they come up sometimes. In my opinion the 270 degree sweep gauges are better than the 90 degree sweep ones.

Mart.

37coop · 07-14-2016, 02:30 PM

Quote:

Originally Posted by Mart

Julian at Pop parts plus has the three gauge clusters. I bought a set from a mini spares place up north on ebay. The gauges come with the correct adaptors for the flathead motor. I just checked on ebay and couldn't see any, but google pop parts plus - they're listing some, and Julian had loads on display at the nostalgia nationals. Beware that NPT (American) pipe threads are not the same as BSP. (I guess you already know that). Search Sunpro on ebay they come up sometimes. In my opinion the 270 degree sweep gauges are better than the 90 degree sweep ones.

Mart.

Cheers Mart, I bought a sun pro for my truck,sent over from the states, I was more thinking a temporary unit that I can use to check and hopefully get the in dash working ,I don't mind a mechanical on the truck but I was hoping to keep the 39 dash nice n uncluttered with no add ons ,and I,v got the 270 sweep on the truck ,I will try pop parts plus and take it from there ,most helpful mart as always ,cheers. Jim.

petehoovie · 07-13-2016, 04:53 PM

SMITHS GAUGES - Made in the UK > https://www.merlinmotorsport.co.uk/p...n-style-cb-cop

Smiths Classic Mechanical Oil Pressure Gauge. Gauge reads from 0-100PSi with 270° needle sweep. Pressure pipe is sold seperately. This Smiths Classic gauge can be supplied with either a Chrome or Black bezel. Please select required bezel from drop down menu above when ordering.

37coop · 07-14-2016, 02:31 PM

Thanks for your help guys ,will follow up all advice. Cheers. Jim

Mart · 07-15-2016, 07:55 AM

Jim, for a temporary quick fit to get a sanity check, any pressure gauge with a similar thread will go in (I'm talking a bsp into the NPT port) It won't be perfect and may leak a little, but it would be enough to allow you to run the engine for 10 minutes or so and see what is happening.

If the pressure is really sky high, you ought to be looking at the pressure relief valve.

Mart.

07-13-2016, 03:29 AM	#1
37coop Senior Member Join Date: May 2013 Location: kent , u.k Posts: 519	39coupe oil pressure issue. Hi guys. I,v started the engine on my just restored 39 coupe for the first time in 28 years,fired up quickly ,sounds sweet and throttle responds well,very pleased.....but the oil pressure gauge goes straight round the clock and stays there even on fast tick over ,it has been converted to 12 volt neg earth and fitted with a 6to12 voltage reducer,the oil pan was off and all cleaned out years ago,it has the oil pressure gauge and pump and dial from when I bought it, possibly the original. Any ideas ? It's booked into its first show in August .many thanks. Jim.

07-13-2016, 03:41 AM	#2
Brian Senior Member Join Date: May 2010 Location: Masterton, New Zealand Posts: 3,856	Re: 39coupe oil pressure issue. Firstly, verify with a mechanical gauge what the oil pressure really is. If the original gauge goes off the clock, does it do it as soon as ignition is turned on, ie, before you fire the engine? If so, could be a short in the sender or wire is shorted. __________________ Unfortunately, two half wits don't make a whole wit!

07-13-2016, 07:27 AM	#3
JSeery Member Emeritus Join Date: Nov 2012 Location: Wichita KS Posts: 16,132	Re: 39coupe oil pressure issue. I agree, you have no idea what is going on until you have a known good oil pressure gauge.

07-13-2016, 12:54 PM	#4
37coop Senior Member Join Date: May 2013 Location: kent , u.k Posts: 519	Re: 39coupe oil pressure issue. Thanks for your advice ,the pressure rises when engine runs ,yup I guess the way forward is as you said use a mechanical gauge ,I haven't got one and being here in the U.K might be difficult getting one with American fittings but will get enquiring ,thanks again. Jim.

07-13-2016, 02:24 PM	#6
JSeery Member Emeritus Join Date: Nov 2012 Location: Wichita KS Posts: 16,132	Re: 39coupe oil pressure issue. Sponsored Links (Register now to hide all advertisements) If you can order for the US most of the gauge kits come with a large selection of adaptors. Might check out Speedway, Jegs, Simmit, etc.

07-13-2016, 04:39 PM	#7
TomT/Williamsburg Senior Member Join Date: May 2010 Location: Williamsburg, Virginia Posts: 2,658	Re: 39coupe oil pressure issue. Check in with Steve Lang - his handle is Langy on the HAMB. He is a dealer in the UK for mostly hot rod stuff but may be or have a source for you .... __________________ Run to the LA Roadster Show - 2016 My Run to Bonneville - 2013 My 32 5-Window Build My Run to the LSRU

07-13-2016, 04:45 PM	#8
Mart Senior Member Join Date: May 2010 Location: Solihull, England. Posts: 8,794	Re: 39coupe oil pressure issue. Julian at Pop parts plus has the three gauge clusters. I bought a set from a mini spares place up north on ebay. The gauges come with the correct adaptors for the flathead motor. I just checked on ebay and couldn't see any, but google pop parts plus - they're listing some, and Julian had loads on display at the nostalgia nationals. Beware that NPT (American) pipe threads are not the same as BSP. (I guess you already know that). Search Sunpro on ebay they come up sometimes. In my opinion the 270 degree sweep gauges are better than the 90 degree sweep ones. Mart.

07-13-2016, 04:53 PM	#10
petehoovie Senior Member Join Date: May 2015 Posts: 8,509	Re: 39coupe oil pressure issue. SMITHS GAUGES - Made in the UK > https://www.merlinmotorsport.co.uk/p...n-style-cb-cop Smiths Classic Mechanical Oil Pressure Gauge. Gauge reads from 0-100PSi with 270° needle sweep. Pressure pipe is sold seperately. This Smiths Classic gauge can be supplied with either a Chrome or Black bezel. Please select required bezel from drop down menu above when ordering. __________________ The only thing nice about being imperfect is the joy it brings to others.... *"Silver rings, your butt! Them's washers!"* "We shot our way out of that town for a dollar's worth of steel holes!" - from 'The Wild Bunch' - 1969 https://www.youtube.com/watch?v=7NReUd2_0u0 Last edited by petehoovie; 07-13-2016 at 05:27 PM.

07-14-2016, 02:31 PM	#11
37coop Senior Member Join Date: May 2013 Location: kent , u.k Posts: 519	Re: 39coupe oil pressure issue. Thanks for your help guys ,will follow up all advice. Cheers. Jim

07-15-2016, 07:55 AM	#12
Mart Senior Member Join Date: May 2010 Location: Solihull, England. Posts: 8,794	Re: 39coupe oil pressure issue. Jim, for a temporary quick fit to get a sanity check, any pressure gauge with a similar thread will go in (I'm talking a bsp into the NPT port) It won't be perfect and may leak a little, but it would be enough to allow you to run the engine for 10 minutes or so and see what is happening. If the pressure is really sky high, you ought to be looking at the pressure relief valve. Mart.