sprint backplate bolt size
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cleverusername
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sprint backplate bolt size
The sprint engine I am rebuilding came without a backplate, I have one, but no bolts. I now have the pistons in and the siezed engine now turns with new rings and bearings. However I have no way of screwing the backplate to the engine. Does anyone know the correct bolt size?
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Toledo Man
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Re: sprint backplate bolt size
You will need 4 x HU856 (5/16" UNC and 3/4" long) and 2 x HU857 (5/15" UNC and 7/8" long). The washers are WP8.
Hope this helps.
Edit: Those are for the back plate on the cylinder head. For the engine block back plate you will need 6 x HU0806 (5/16" UNF and 3/4" long), 4 x HU0815 (5/16" UNF and 1 7/8" long) and 3 x HB0818 (5/16" UNF and 1 7/8" long).
Sorry for any confusion!
Hope this helps.
Edit: Those are for the back plate on the cylinder head. For the engine block back plate you will need 6 x HU0806 (5/16" UNF and 3/4" long), 4 x HU0815 (5/16" UNF and 1 7/8" long) and 3 x HB0818 (5/16" UNF and 1 7/8" long).
Sorry for any confusion!
Toledo Man
West Yorkshire Area Organiser
Meetings take place on the first Wednesday of the month at 8.00pm at The Railway, 1 Birstall Lane, Drighlington, Bradford, BD11 1JJ
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Check my blog at http://triumphtoledo.blogspot.com
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"There is only one way to avoid criticsm: Do nothing, say nothing and BE nothing." Aristotle
West Yorkshire Area Organiser
Meetings take place on the first Wednesday of the month at 8.00pm at The Railway, 1 Birstall Lane, Drighlington, Bradford, BD11 1JJ
2003 Volvo XC90 D5 SE (PX53 OVZ - The daily driver)
2009 Mercedes-Benz W204 C200 CDI Sport (BJ58 NCV - The 2nd car)
1991 Toyota Celica GT (J481 ONB - a project car)
Former stable of SAY 414M (1974 Toledo), GRH 244D (1966 1300fwd), CDB 324L (1973 1500fwd), GGN 573J (1971 1500fwd), DCP 625S (1977 Dolomite 1300) & LCG 367N (1975 Dolomite Sprint), NYE 751L (1972 Dolomite 1850 auto) plus 5 Acclaims and that's just the Triumphs!
Check my blog at http://triumphtoledo.blogspot.com
My YouTube Channel with a bit of Dolomite content.
"There is only one way to avoid criticsm: Do nothing, say nothing and BE nothing." Aristotle
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Mad Mart
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Re: sprint backplate bolt size
There are only six bolts holding the backplate to the block. These should not have any washers of any type on them so you should use some thread lock on the bolts.
Sprintless for the first time in 35+ years. 
... Still Sprintless.
Engines, Gearboxes, Overdrives etc. rebuilt. PM me.
2012 Porsche Boxster 981 S
... Still Sprintless.Engines, Gearboxes, Overdrives etc. rebuilt. PM me.
2012 Porsche Boxster 981 S
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cleverusername
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Re: sprint backplate bolt size
Thanks, will order, shame you can't buy imperial bolts in a shop anymore.
Following assembly instructions in the little book of lies. It says backplate, flywheel, timing gear and then cylinder head in that order.
Following assembly instructions in the little book of lies. It says backplate, flywheel, timing gear and then cylinder head in that order.
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Toledo Man
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Re: sprint backplate bolt size
You should be able to get the correct bolts from a few of the usual suspects.
Toledo Man
West Yorkshire Area Organiser
Meetings take place on the first Wednesday of the month at 8.00pm at The Railway, 1 Birstall Lane, Drighlington, Bradford, BD11 1JJ
2003 Volvo XC90 D5 SE (PX53 OVZ - The daily driver)
2009 Mercedes-Benz W204 C200 CDI Sport (BJ58 NCV - The 2nd car)
1991 Toyota Celica GT (J481 ONB - a project car)
Former stable of SAY 414M (1974 Toledo), GRH 244D (1966 1300fwd), CDB 324L (1973 1500fwd), GGN 573J (1971 1500fwd), DCP 625S (1977 Dolomite 1300) & LCG 367N (1975 Dolomite Sprint), NYE 751L (1972 Dolomite 1850 auto) plus 5 Acclaims and that's just the Triumphs!
Check my blog at http://triumphtoledo.blogspot.com
My YouTube Channel with a bit of Dolomite content.
"There is only one way to avoid criticsm: Do nothing, say nothing and BE nothing." Aristotle
West Yorkshire Area Organiser
Meetings take place on the first Wednesday of the month at 8.00pm at The Railway, 1 Birstall Lane, Drighlington, Bradford, BD11 1JJ
2003 Volvo XC90 D5 SE (PX53 OVZ - The daily driver)
2009 Mercedes-Benz W204 C200 CDI Sport (BJ58 NCV - The 2nd car)
1991 Toyota Celica GT (J481 ONB - a project car)
Former stable of SAY 414M (1974 Toledo), GRH 244D (1966 1300fwd), CDB 324L (1973 1500fwd), GGN 573J (1971 1500fwd), DCP 625S (1977 Dolomite 1300) & LCG 367N (1975 Dolomite Sprint), NYE 751L (1972 Dolomite 1850 auto) plus 5 Acclaims and that's just the Triumphs!
Check my blog at http://triumphtoledo.blogspot.com
My YouTube Channel with a bit of Dolomite content.
"There is only one way to avoid criticsm: Do nothing, say nothing and BE nothing." Aristotle
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Jon Tilson
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Re: sprint backplate bolt size
Note that the backplate location bolts have to be in different places for manual and auto cars.
If you put them in the right place for a manual car they foul on the torque converter to flex plate bolts.
Jonners
If you put them in the right place for a manual car they foul on the torque converter to flex plate bolts.
Jonners
Note from Admin: sadly Jon passed away in February 2018 but his humour and wealth of knowledge will be fondly remembered by all. RIP Jonners.
Okay, as i have said before.......
Marine, agricultural and commercial machinery suppliers all do.cleverusername wrote:Thanks, will order, shame you can't buy imperial bolts in a shop anymore.
Ian.
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