10 replies to this topic

[spurs1975]

I have recently had the engine and subframe out my 1987 998 Mayfair for a thorough good clean paint and dressing of stainless nuts bolts brackets etc. All has gone fairly well few hiccup's etc but now I have hit a stumbling point with getting it to fire up. Fuel seems to be problem, none coming from mechanical fuel pump.  All was well before I had the engine out,  car / engine has low miles.

 

I did remove the pump to paint the block so any help would be appreciated ( oh the car has been sat facing upwards on stands for around three months)...

[nicklouse]

you fitted the pump correctly with the spacer?

you fitted the drive arm on the correct side of the cam?

 

remove pump and see if arm is still there.

 

if not then engine out.

[spurs1975]

I have fitted the spacer but not being a mechanic hoping arm is the correct side of the cam,

 

If all is well when i remove (fingers crossed) what side does it need to be as room is limited with engine being back in.

 

Many thanks for your advice will check it out, Haynes Manual was not much help here!

[tiger99]

Where are you using the stainless bolts? They are unsuitable and unsafe for any stressed part of the vehicle. A2 stainless is too weak in tension, while A4 is too brittle and has poor fatigue properties.

If just holding the fuel pump they are ok, but if you are using them on the subframe or stressed engine parts you should change back to the proper grade 8.8 bolts before driving the car again.

[spurs1975]

Pump out and checked ( all in one piece thank heavens ) so guess it wass fitted correctly, will refit and explore other avenues.

[spurs1975]

Where are you using the stainless bolts? They are unsuitable and unsafe for any stressed part of the vehicle. A2 stainless is too weak in tension, while A4 is too brittle and has poor fatigue properties.

If just holding the fuel pump they are ok, but if you are using them on the subframe or stressed engine parts you should change back to the proper grade 8.8 bolts before driving the car again.

 

Wow!  interesting fact I have my front and rear subframes  attached with stainless minus tower bolts, never had problems with mot testing stations

[Carlos W]

Fuel in the tank?

[spurs1975]

I did think this myself as fuel guage has mind of its own so put a gallon in yesterday, think it might be the angle the car is sat at raised up at front for so long. when I get back on all fours and pump back in will try again. cheers

[spurs1975]

Soon as Ruby was on all fours again she fired up straight away. Small amount of adjustment of timing and the trusty Hs4 and she was perfect!

[nicklouse]

Where are you using the stainless bolts? They are unsuitable and unsafe for any stressed part of the vehicle. A2 stainless is too weak in tension, while A4 is too brittle and has poor fatigue properties.
If just holding the fuel pump they are ok, but if you are using them on the subframe or stressed engine parts you should change back to the proper grade 8.8 bolts before driving the car again.

 
Wow!  interesting fact I have my front and rear subframes  attached with stainless minus tower bolts, never had problems with mot testing stations

Not part of the MOT.

It is not part if the MOT to check you are using suitable parts. Just that nothing is failing or about to fail fall off etc. Common stainless and Ti of Alu nuts and bolts should not be used in heigh load areas.

Like the mountain biker who replaced a whole lot of steel bolts with Alu ones. Needs new teeth.

[Spider]

 

Where are you using the stainless bolts? They are unsuitable and unsafe for any stressed part of the vehicle. A2 stainless is too weak in tension, while A4 is too brittle and has poor fatigue properties.

If just holding the fuel pump they are ok, but if you are using them on the subframe or stressed engine parts you should change back to the proper grade 8.8 bolts before driving the car again.

 

Wow!  interesting fact I have my front and rear subframes  attached with stainless minus tower bolts, never had problems with mot testing stations

 

 

Sorry, but as others have said, Stainless is not the wisest choice.

 

It has no Proof Load Rating and a widely variable Yield Strength. It also work hardens with vibration, though that may not be too much of an issue.

 

 

The original Subframe Fasteners were Grade 5